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 0x399c1215df40b7a5ef9f36d45bf55c5a4319ee9a4e99c6811ee3e09a46bfa41c. 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/e53debb8-4a77-4d5d-a613-7e89d1d9452a.json and https://artists.proofprofile.net/proofs/artist/e53debb8-4a77-4d5d-a613-7e89d1d9452a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Motorcycle Diaries with additional Music
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 0xd1bbce32ccf8423936722bdee2cb779b6384340f01e2a9e9490dc141a1411411. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEN960430301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128a60614f03533a0b23067afcda03145008fc9832401d9732465800d7448674. 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/DEN960430302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e9ba927bcebbcb1a74e4d3777f913d1e234a769e37745b6e7c38a182a52ae9. 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/DEN960400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce0180c75dc6c2ce167e6656d55d0bdb58dcf250a05c30cceac88909d82957f. 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/DEN960430307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a09b374e869c5c34bc50d0dcadc068cb3f697c0d7b937b687c320b8106bd79. 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/DEN960430308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae46c80e867212d8e4ffc41e9dfb2f193612353d6dd81e1c92d63ed3c6e5bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960430309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910b25ebcb29381d4ca9968bf8d0a71f4b8528fa82b634b2effc95ac44b9b138. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN960400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed783d727d6d4b8be60ba27af4544fb36ad487ccc5f3ec240b5e82eea89ab1b. 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/DEN960430310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9ed31e01562ac59fe7c484d60792c4d283ac58298f0f0a99ba7ef61c037a1. 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/DEN960430313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef696d63080ee6327d527a3ec1635c6462eccd844d8c376292a97e5c4cdda5f. 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/DEN960400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f181b6b822b1cb5c7df9eb480c890dd2673b6e92f4e7fe3e4ae1ee3fa608cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEN960430314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373a61c74b97a57032ce6580ae1bde9bdb27d9df9617f52e91e36af81ba390b1. 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/DEN960430315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122822dd814dc24cdb33705264aecfe8fc1b4a4c70af9152cffcf92a68ca07c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960430316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e9c282cab7af6c78c55cd52ef6219e855efc6a899d010a2d67a09f50d567f. 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/DEN960430318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bbce32ccf8423936722bdee2cb779b6384340f01e2a9e9490dc141a1411411. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN960430301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128a60614f03533a0b23067afcda03145008fc9832401d9732465800d7448674. 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/DEN960430302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b972a765f61f5606be674295681921abbda4603fb927ef8cefe2dcd9493a317. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN960430303.