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 0x37c5c9779fe89cbc343bc47302ce71d56f94f3a55425261d842f58394011d576. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36b371a6-82c8-4cbb-b863-6b8b11898e1d.json and https://artists.proofprofile.net/proofs/artist/36b371a6-82c8-4cbb-b863-6b8b11898e1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roça do Ventura (Zogbodô Bogun Malé Seja Hundé)
Candomblé Jêje Mahi & Nagô (Edição Bahia) (Vol.2)
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 0x9fe241e4162b1673eaf0d07df49b4c7a24050519112f3211597e64e35c994c17. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BR33T1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4f6413154382fb39c40b8bef8afdffa8505fd403f727e36cb22fefa51ab987. 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/BR33T1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde657b0eb8bbfc1b27a6373309bef52cadfaaa9fcc2ec72be56260ca927b173e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR33T1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc9fd998189ecbd8e68de073903629d9ce731aff3dfe6cf5a71c70fa34c911. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BR33T1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba3920b6c318e858bee8e0c0ef9d52fa15dc659402841959e01fc972eea3478. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BR33T1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8039990e51467c1fa689d4c912fb6280b21ecd038e4ac79889e99a1def67e9. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BR33T1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f94c217586b9b20785abdb2e06b2b5ce295dcfed5bac110b3330627e3881f4d. 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/BR33T1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754d0b89694f0f7e70ebc778de7cf208e1ae948f3c36964d80acbd31c291ee1b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/BR33T1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8902b1e2cf8c998af3824e26870c11c513dc8347ae2194098874c507c7d0d9d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BR33T1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be654d19ad7fbc4917f5305dbcd37b7725baf35548c2bd55e179bd2b675ab8b. 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/BR33T1900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc710915d4ca6fe2166a5898c69f1ed92f0dc044e0a5d66c904a203dc305a4cbe. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BR33T1900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956ff694735c0b62e57db0b855a0d57562fc0a9030513d07e86b0f250b7757c3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BR33T1900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae96778ee28cb4c960959873ed09a65489fb53d93216a6cb4a64043d987af16d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR33T1900039.