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 0xecebd76c30393cc9f2bdf7fed151831c9c16bf864ebd5dc1fe66070d205d9424. 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/e5d2046f-5ede-4ba0-99e8-f1761e3dae18.json and https://artists.proofprofile.net/proofs/artist/e5d2046f-5ede-4ba0-99e8-f1761e3dae18.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 0x53aff47fd9302d7579565b01ed0f2f40be42ef60e000019c37cd1a2b53258029. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/AEA0D1859954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f7549700c44913d6c2b5e594a8f848d552be7d073e5fd574d92502c067b3ad. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/AEA0D1859955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8d04a31dd3472c9b9ce4a0ed4672cfe58b36d547041bd0d5e88c20a34ea03. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AEA0D1859956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d850f5bd798ea35cda65b880ee36130c25d0fffd3cc14934b188e740c2cbad3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AEA0D1859657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd0f5becdf8e3843c849e59dc527779c37aa6cd0c082519f6a5737b628847f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA0D1859659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9a5c57bd285cba4eccd44c0249ade38a31c32bd50af0964177f1086c7190c6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/AEA0D1859660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ec91c393bb6d11f4b0fb4098b83fc0d68cbe2c1a3ca13a540d3ada4c9d18a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/RUA1H2060047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf151c53f268a02dfcf7ebee904876f934a1f6cecc0af1fa8f8998362c6206. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/RUA1H2060049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cd58bb666cb182cb9d4399f5c542a632bc73a25ee912e196fbd29e2c70bffc. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/RUA1H2060050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5490dcb8fc284cba15b9a169e516fa68c3a73025b5a9117309da58cdd87a4d2e. 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/AEA0D1859664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b677c511de0a9182cdd056517c96481f860c2e72fb66e5b64395085efae79c. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/AEA0D1859666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ae88a487db631760850e8b12f540d1fa53508953d81684c59653d7a8a3c7b8. 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/AEA0D1944656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0f43a1d319a7b8160692a2a79601a070e3efcf1a772a99ab8df574dba5164c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AEA0D1944657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60042deb824a7cf6eca2d0118da68a120d28207d08e373c49348c4fefe31b258. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/RUA582002480.