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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33edc2d19e547883836eb15b378ef1cbf4c40bdeffac101212087ae9bf3c79d. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54a182e3-a21e-4b5f-92b4-cfc94f724c49.json and https://artists.proofprofile.net/proofs/artist/54a182e3-a21e-4b5f-92b4-cfc94f724c49.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En attendant Mélodies & Cantiques à Dieu
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321486da5ebac26bb50bffe76588ffee63cef7534bf39516bc32174d4ba51993. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAEI1927544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d369b1c9de88cd20dd5e85e7c5c1959cf4441c7a658067d32ae2fd59db95f49. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEI1911447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd90c4b25c7afc5973fa7917520902efcc88ad8b68e9e626ae7b186318bc0a5. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:39Z), 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/TCAEI1945777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf90ac97f1a16d548282b65c6aa8868aab2356db6628d418c1ac546e5e1f465. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/TCAEI1945793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb660628c95692f7d96ffd98d899d42aec57945e98244ce09e26d141669f36669. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:29Z), 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/FR9W12231737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398dea42a239a7bcb4e65915a0fc644d72f03deb0194df98acdb76732c41e5b7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:22Z), 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/FR9W12231738.