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 0xeed98448ef9b149eaae98023a42652ddef0a2adbedc3e9bae1c74ddf82d2de7d. 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/87dd4c75-e9bc-4021-a4c2-1f8e61805ca6.json and https://artists.proofprofile.net/proofs/artist/87dd4c75-e9bc-4021-a4c2-1f8e61805ca6.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 0x9c68dfa868ec4e16423aab747fb6405a587c81f4400197a899095bb74dfd4efd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR6V80663291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395e4ae0f00b5b66b7235bc871ab7caa30dc0fac8f428a5fe7ded6668556254f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FR6V80663293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d934e8dfacd1feb2991d21ee952769e7166818ed3ed0c2e1560f2a3ee0109. 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/ITQ031300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cb94c0c46291933ebe8beaa3166376533ffc286a122df7426b681ffb635bba. 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/ITQ811300020.
La Zumbera - Jack Mazzoni vs Christopher Vitale Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd072eecd1f17f45bfef5a9b55ab3db021e6f6d87d056831d26af32bef53cba97. 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/ITQ811300022.
Summer Time (Fiesta, Coco, Rumba, Zumbera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36bda371dcff922fe33bb219a1889104b24200b4b51bcb75045e648753f5498. 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/ITQ031400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d934e8dfacd1feb2991d21ee952769e7166818ed3ed0c2e1560f2a3ee0109. 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/ITQ031300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8209babd3f8e20bea50deaa5edffa6e302bedd7263d4e81143dc7a2eaec996bf. 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/ITQ031400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdda3ecedf32c46f74702ed9f1b4e7b7d30992ce74d96048835585a9f85a8f6c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITQ031500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf15772e0dbc044dcb1ed6c2323e7bca4639ff17920f9cfcd0210c5818f14c0. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/ITQ811900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa297a1aa6ec15e8ca71fbd9173d8b603fd2bf2ab6a0c9412ca345022b4f903ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITQ032000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a8464568c0c3c15bb2e71b031cac29548ee16e14f1e7a1cfdd37d99ce6168. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ITQ032000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281fdbe82505d7bafb9e5a9dd18665eb7a6828e755b086eb8e314b14166b2762. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITQ032000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1bce967bec73dae6bacde43026ac29972ac7502247d95fa1366b33ced775b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITQ032200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d358b2e7788a5c304576dd929f7310c2f8b0bf256c9fc64c415bb7358b0fb25. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ITQ032200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd4339dbdba04d887ced7b37dc1508d54406b65528ccd00211071f89538bc9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITQ032200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e5a911d6371e5fea2ce2d91e508beee78292d756be290fc6111498efd2a7e2. 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/ITT4X2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38641882d1f366dd31e6126e015968330aa1e0592bb0b7e428c917c21d75c60a. 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/ITLQR2501303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1478d46bd204be1aafc8ceb4b91badc2b913a464e74c06e6feee7516df25638. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ITLQR2501305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6bc1e490142678636c6cb2f5d159d6dcc6f26421de3a0a60770e68356afa3d. 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/ITLQR2501306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72174cbc54bb518b6a0438a5222c711b81a44ce545e990cf17f92a00f3e40db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITLQR2501307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b08de1004c99677883baed4310719b04139971c46fefcf18e175aa385c644. 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/ITLQR2501308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa297a1aa6ec15e8ca71fbd9173d8b603fd2bf2ab6a0c9412ca345022b4f903ca. 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/ITQ032000025.