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 0x992a3c1fe3011bf9e272dde7459732f707aa31e25b7b98372e2659afca2151ff. 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/a56dddc7-d194-483b-8005-058b09ee6154.json and https://artists.proofprofile.net/proofs/artist/a56dddc7-d194-483b-8005-058b09ee6154.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 0x02acee43ad1991ce8e60ba11cef9a164e50824ec2755c7365b1ffd8b03c09380. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/NLGM11701699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233bb74340618a0596928738b94dda8216757204249edb0508659cf9a3151a1e. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:37Z), 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/NLGM11814210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8035bc1a8631e949704637d5deee12d2c883af92becf8f226b433797aed5e41a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:46:43Z), 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/NLGM11814211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5528d313da7c9b62b457fba48e05bf9431ca2cc56caaa7e13754ad784baf3e78. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLGM11814212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867c6c8e11bb0d5b5118f3cc8e890d3d820012735f4523cfa374541ce33eeeeb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLGM11814213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba6f0071c9fab60405a3f2a48e94df6e54010a5774ba23f1b5ea863221279c2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:44Z), 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/NLGM11814214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf619d2bca7c81aa305a12e24c124dd850f2de0b86e7ab93d30d6f621875097bf. 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/NLGM11814215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d5ba2d9710cb48ad0538d84ccd1830ff703bfae7d92fdcb2c7c42b0929bab3. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NLGM11814216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d4d701c73c6f5489242a4ad3b1359acf7a4aa4db9b1afc6c1549d5afe25d5. 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/NLGM11814217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95cdd72720b720941690a2db630f643d29b0cc1b576dde135442660934e5e46. 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/NLGM11814218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c7014b135f6ffea9cf700249c3feeee2aa303edd65ee43c279045c21e94ac2. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:08:00Z), 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/NLGM11902030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf712c1a6a604022a68f0459800ab4793926e1939dc8b24929634b777aa35161f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:20Z), 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/NLGM11902037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c94778313280b69ec2bf798553a65b3b759d922137022d1b7702d18c06fe6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLGM11902110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e551d26b8fd0544ef01d05137ad046dd77b1981901d497671ed6c870e1e482. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:19:30Z), 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/NLGM11902071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9ed6209073e8d18326fd9a9596506ddf160914a3a01d1ebeea1ff0ac0f9d4d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:52Z), 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/NLGM11927200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5932835e39a7e7050726c226a93e6ed8377808f327c1deb7ccbe8bb64b8e96. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:48:24Z), 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/NLGM11927202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87634b16852b7466f7b9864d4641c076feb60918dffc9db25b480fd5011490d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLGM11927203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93399adf32614e9acce799bf71fee4904e0e523665b263f6a5c5aeda35dea2ee. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLGM11927204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c43335988f3ef10708f3225e8a567e090ba3b03f433e3355764b976622b7f7. 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/NLGM11927217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb430d60ae13c6572459da4bf174599ac396737bf3b2e3baecae49bad0732eadb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLGM11927205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7715f449777603550c6b15860f7845c5da98ca26c3037dac79df970a68c8ef2. 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/NLGM11927206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b2e23f6cea5906fee646883dec0184f2d6ad66de332ce553d4eee0a307a060. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLGM11927207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace3fa9b28a0d371cabe0749596eb8f48688cf3c561eb9b6e17839cf925b94e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLGM11927208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8911c0b22749932ec5ef0e2ded9e5b47e160f20512dce761d7d40da68a9cb25. 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/NLGM11927209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e708ecf96ef06ab1272be3dc1354b419de975e9ffa0dbdec0971108921f88f9. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NLGM11927210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a7b120c3ac5bd13c363ba07ad740d52b73f9f47e25b411d12dfb7e9369f8a1. 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/NLGM11927211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870bb6b07850c921ff0b75d40b116973aa2ec8f513fffc58ea5c73088849f27a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLGM11927212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b7824b10e0712fe177758a9bb21e1c5b95ab473eb7a34554833c5aad7ca2e6. 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/NLGM11927216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083ba5b16f8372efd1324e45309aecbb1b7d4bc43ee7375faec34dc90d8fdfa8. 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/NLGM11927218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342a60d6c08183d8bdc2c2e6794bb0833f8e71ef0287b3654afdeefda3636f68. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NLGM11927214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc053ffaf1a73a9dbffb3199083a3fe7ea09ac158020799e0073ddfdade75e825. 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/NLGM11927215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadc2afb2f1df91210d616ce6137950521965dc2857a8877c64600119c02030c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLGM11927219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37b8844ec7c1140e70e0287c9c257afca45bc741547ee42ebe0c485317c8194. 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/NLGM11927623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf9b8f2198c210072e41a543c8189e2690966e845b08b66902fcf7ebf2a7252. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2274166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe160b3d85703cf8cbb1381e481f59361ec04dcb86c8795656610cec60152dbea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2274168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e1f06d47725ad73e39cc4a3d03773ebe73c0064ddedbf028dbc8627023ec8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2274171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cdec00f471fd6025428ebc46cd094c9ae9d95f86e011e0838819a4989de7a8. 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/CA5KR2274174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c464ea67a01c63615a80cf6283159cd9dbb6e3c38810b10be7b92fb5bb992e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CA5KR2274169.
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 0x646d66232cace008e704d16e85c4dafc305d95f346dcd0685998642634000df5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR2274170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec10eda0013ef5139b1c1f41c67d99fa1de1c68ef095ef1b75bf579ce13164. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CA5KR2274172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b186b9b8fdf99efee79f15ca2ec773f7ea202811a4279368682f35f30cc557. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR2274173.