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 0xf47a54504ad495e5b3aba4ea76809ff9daa251a81199ecae4d48525718f5b35a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f896631-78e4-4e69-96ec-0d5e910b1b7a.json and https://artists.proofprofile.net/proofs/artist/5f896631-78e4-4e69-96ec-0d5e910b1b7a.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 0x0be9507492d0074c51633c74715c1932085b1a8f2cc7d2cbc885a60f3542b163. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRYU01900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c2eae4582f8d8c0cc9eefb0dcc72914337281984126d39244bad239acf3a7. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BRYU01900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a5ba5efe6c1eb5b360ab04b180edc52e81baaba422b80365d3be8d167a1d24. 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/BRYU01900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e531798590827821e02441777af785c6d26a111959854802d71bee9dc2c82d. 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/BRYU01900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3180556a19fcf7195526e51f30085e458cd88158004dee9fe0517fee23abe32. 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/BRYU01900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470354bc76ee59c8afc82fd9b376d9194f751f18ba7f64a47630b21c197c4aa1. 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/BRYU01900007.
De Encontro Com a Morte (Releitura Facção Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a84ce46791c6252392fd1abbf28e561a484ac65bd20bfbb7f2ab6d70dc7e37. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRYU01900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cfba11dc2db1bc29c04054dcf650aa1aa94fcd8b1bd8ea95209bff236f1543. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRYU01900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288542efb1176465a28db3a9f8105e58a1fec644e09f65d80eb28d607b27b040. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRYU01900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381f4d6d16acb9acff9686c85c175e0dd61427a1ce7c53ca3e7c1c5a777e601b. 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/BRYU01900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92177693c875ce1d0465902066f46d6aed0220fc75722decc07cbdb8a955ad25. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRYU01900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26107cb4171102fb585d6adcdfd1d34ace1ebe80e40145d8e77af1639253a5ad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRYU02300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc021d6381813ace84ece1b4a1b81150320bc4e583d9784664d22b2455e28af9c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRYU02100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0555cc5fd2b470e4a48e93fb971b5bfffdf6892decdc3fed645550b1ca440c. 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/BRYU02100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f72cc0b2e823cbb1648dad5409268e5deae10be0f86681ddfccc499b699046a. 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/BRYU02100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca75e083dfcc8198ccc761145ccbbd48e27a0f47be28a7e16ee99c0e767de6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRYU02200003.