Doctor Krápula is a Colombian ska punk band, made up of Mario Muñoz, David Jaramillo, Nicolás Cabrera, Sergio Acosta and Germán Martínez. Although the band is recognized more as a rock and punk band,
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac27a32b47337c4354916046fc4be0215219a37c2f6cd03d9cd0f196b8026ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81cb7f2e-5935-45ef-98e5-029683e88716.json and https://artists.proofprofile.net/proofs/artist/81cb7f2e-5935-45ef-98e5-029683e88716.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35dfe6cc259bb3edaea94e8456e466d8e6412c6de39c7711b80b9e3d26b704. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACM1678341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa788b53f7d8ffc932e10834d9412a77aece366081722ce86c2302f1fb662b848. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACM1678371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a256ddb08b154d706a242d3c80007fbfdc5d337833e918816cfbcfe3483b9c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACM1678482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2491e859e0f9ab9601d2ac42706afe4d352316f5745046d9b67ac8819339994. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACM1678501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704f23f599ea5851036dbe9f9e4c5139f58c6eed1b80c3f8e0596634814a4c4c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACM1678504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80f48bdcf8e87f91953e0f91be2e34bcbbdb84c856ca26b307cbe127697f7cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COSO10800918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a66b4668d72c979a1d5c092fa0fdbd82cf8d653020cef2f17be4367bf446352. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:20:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COSO10800916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2e95ca62ba0fe1999606fd788986becf92304edfe8acd7af17b00d1a427a43. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COSO11000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09548ceae79ca993d93ab2e8ccbe9ddae01241f2e8c4a73afed38be53a2309e5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COSO11000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df9fcb12b611fc732b235f854f2387af08f88838fb9833ab2a1938761dc57d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COSO11000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37038ab4248d77562b1041c241f3cf201ec91f2bd0561e40eebc5b20327190aa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1657700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f0bd31380708721374c0614ae6a756beb897872009c053a3ee2d66e2ed0e9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1657702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91651ee0854bfaea63a7add26617052466d729243d31e13de5c74956365de396. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1657708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2fa59fd9e746b0287b6869f686bd5396807e621edf1ac24f333d3800d43fc. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41414270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7d66bef14186c27e43285c44259338e738eb84a709b6b2688b5f95dce6aba. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41414275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c558e0f9d6b602329c406e935db448333a4b694910888b8917232b46792c933. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX451598952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff50901f7167be913f3dc937f5a61d2f2546afb348058c8bae4ccca65a8452f. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1674955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45a752c6e33eb391f0c26db47ed6105e796932fd4e8d1f87f5cf2913cc1c7b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:54:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1674960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e0de32a45ca3c943fd7b8dfd4c990c5673b51acafda312419de0a342b7f77. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1674946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd8ae44a53044982bac9ea0ae1e8ecf6b484b96fd2cfc198f00309bb1a2fb9c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1674957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f9a41148e37fc8fd112022673a8bfcd3f65b3748e1dc1c59aa05f8e11cba42. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1674958.
Tour Doctor Krápula: México 2015 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdd488b4d8e2b4b813aec8cea4120434d07209acc8bdd7e38d998eade1eb1b5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES321700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdd488b4d8e2b4b813aec8cea4120434d07209acc8bdd7e38d998eade1eb1b5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES321700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e32fbf34aafe572dfdef59ac9d8a1e7963ba1e4850f3c591025bfa16796a7b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41878740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28c140e85f4bd12dfeb126906fd1fdf1a71d371ba3f7bed33fa4cb43843f8b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1642187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db61f214c0988ed12c0ccf816c74cae510d5cf70b784c6242eeaa19a90251df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41975359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cbc06744bde5c9f39f2f9cec4bb6cfef81829bc63de04a4d332b27c480a2ca. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R1961622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683a7617ee96256193b05c922c1f0da47e8e58e1f2e7f5fe458c2a0b6f593849. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762035047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e292e3e8f48c190b756ac5037b87400516ca307a9080928c412b88433747f. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA062212572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d5c6559088dfedfcb637631f9fd01e16dd7f115f2d122e37bf58a14a6185ac. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2126490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2382b79824947521122143d208e9b13abeae1086a72312c49f6cec5e822030b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762335247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c930bdab84324f6e4ed1ead809f0677627fc13bc874b84188ef13d6dd4c6c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22409849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ac82a1e30077462153a16e2a4d9e51c474cf0049c78ae6665a52af79634483. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22473739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460c0f86e901680085685dd68af814b5e32d67fb96648d05de7603922acc1ae3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKXN22597601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c739bcfba4e19526d0bcacb8bc898e2190f5dc0bf432778f51147c607be7f8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXH2J2504481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b407dd4972beb12b9f8a30a94bd44b87553a53f34c5c4eee86e147a608bd23d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92126608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d39a1c9cc11c5c3ca9cafddd0f8616a2e315cd26fa3d419ce5b200131f44b6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADQ1896643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3351523543e0d395ba0318c88112418ea11b2344748980cd7011fa34c852b58e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDXS2203985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f57864221cf418a4210ed5abd29aa0dc0b78383d5bd34cdf4bcb2ddfe12152. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COGM11614001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72995fefe229378c29918ac3aee555dec91adc5b6a59344848902407fa2a905c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41559883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b407dd4972beb12b9f8a30a94bd44b87553a53f34c5c4eee86e147a608bd23d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92126608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6ee9f52cb7aec76f4d90177bf047c119aecc7a9c8d63ef2d4289f6aa34a82a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COSO11700034.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe8d00aa5ccc8bd8e47ef88d402139f783b543785fb99e59f5647483333b929. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDXS2203984.