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 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 0x6615b82a0a5ef894d8d7dfe451ddc3d275994de845103710ed3708c68d9917cf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7acc432-593e-4fb4-a7a7-d8a911675fa2.json and https://artists.proofprofile.net/proofs/artist/d7acc432-593e-4fb4-a7a7-d8a911675fa2.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 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 0xf8da1443474eaebc1492114a4bdeedcf4557664ff3cd5fe3b2677bf12a56196f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX282098240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8eca8a1ded15cb8efab329cad3b733e17e1bdd34ad7a2aaafaadf04cfcb135. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA072150315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14006050f226db5360796e8e1b7c60d71dfb4bbe97cee28454ad449c103ccfd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX452189080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd7c274701f177607558192043fde88d56dbc6d9263d738b1095070a0db81b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282175123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ddb36ea1092b374b8d32eeebf3a1307c02555373f195cc4970c4b8002c5b15. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FRS182072397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d40f9d187bd7ed249f436230b1ae20d35b5b57d4414c323b1568196d395ad88. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX762065097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a87f28fe72126cb2cf46feac54108c9e4f9dcdc531220529d73b58a73a98063. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762173204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e9347d13011e5c2a2cf526e228abf9ba01540f93538ce3709ff531dc55216f. 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/FR96X2250830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b69123d3f0878207bead99fe02af3b50128413cf07fdc7d0159a021cd545e74. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR10S2273080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b948e7a732fedeca2bfa6b591d5b505a496a128103a1143d0c8056dc0a3700f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR2X42296547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113551e5b36c356f6c1c716067f0b1ae23e1598fa131fde8a0b8eaf660c89451. 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/FRX762186106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025d665d4be25131f02b7ff6483675a0ccf7a14e9e34de7cdae03455186f188b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX762173203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1432aa6bec2cec9313e2ca41db69e13d81ba80b4223d9e651833cecf2a2e340c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX282398720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07e807f49cde7288d070da68e064e6b46f3bcfd4d9ddb5163a6f09c3b86e1ec. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAHD2332131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee49bd09044059c249198016671d8aa2e87966f1093be3cde7f19cdc94d89437. 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/DGA052303163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6101f3e4b7ac122c2c59aa7ab319cedc964fdbe69a567b85c2dca676fb3171a0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DGA0R2335055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dc742f98decb69e3f97d8154222a26ce39c3ae3c35478e5fc4c2620031886e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FRX452442380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246a8307216437d9ffa16a4c7ab7a0167071c4c9780568e1bfd78c863b2a2d1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR96X2428280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1432aa6bec2cec9313e2ca41db69e13d81ba80b4223d9e651833cecf2a2e340c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX282398720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eae82157114f93a6eb2ab26f9ceabb58ab459a7893a72fa953589829a45a577. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA052440221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dc742f98decb69e3f97d8154222a26ce39c3ae3c35478e5fc4c2620031886e. 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/FRX452442380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe228e58d96629dba8214f560152b78a1230f52185034bf5b93e295b056c9acff. 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/DGA0M2316381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eae82157114f93a6eb2ab26f9ceabb58ab459a7893a72fa953589829a45a577. 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/DGA052440221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a50388fcac86c2009af7a8b6355217e9b2589cc6f6af8e0740bb4b362947be. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA0L2343959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246a8307216437d9ffa16a4c7ab7a0167071c4c9780568e1bfd78c863b2a2d1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR96X2428280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1432aa6bec2cec9313e2ca41db69e13d81ba80b4223d9e651833cecf2a2e340c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX282398720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886eab279bd01a13a9ba5a74dbaad470e4952391f6ee1b6f85ff69ea2e068dea. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DGA082398560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1d32aa9c426c0dfab25d508b5a0091b20de2abdd10d55ad25ea5c39e1135c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA0P2402390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c826802872dfffb17ee04fbab37747acd059d027b733548ee0691886bc95a3. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/DGA0R2443411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1d32aa9c426c0dfab25d508b5a0091b20de2abdd10d55ad25ea5c39e1135c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DGA0P2402390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1d32aa9c426c0dfab25d508b5a0091b20de2abdd10d55ad25ea5c39e1135c. 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/DGA0P2402390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c826802872dfffb17ee04fbab37747acd059d027b733548ee0691886bc95a3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DGA0R2443411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212328f1c44e7d8c97faa1d7eaebfed4c4e4d3d057cff5bf26eda3054c5099c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X42536771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9943886b8869bd61de306cba16418f5abc817a3c246edce36ba7fd998d3af5fa. 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/TCAJR2517118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c207bb4a91ec760e71b25c0cf68579377c4b36f28b1d59aa2b9cdb2e3acee2. 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/TCAJU2578475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e47f3abd60b44f3e040675c4896193ef0a15fd728d15b681e8655840467e0d7. 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/DGA052539316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be01d77fffce40d3455f78e3ec4dda597d5cdcb11d854f8a3ad12e1ab7de7a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA062508490.