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 0x699268222a899b06d09215c1d64e273cf221f9061fea938857a2b2f1473ceb54. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a031669f-ae16-4f93-a15d-cb94eddeb504.json and https://artists.proofprofile.net/proofs/artist/a031669f-ae16-4f93-a15d-cb94eddeb504.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee2b41160c8ba315e089b86fe11a6082e1b9b91e71f95bd8f295b9bbb8468e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:44Z), 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/QZMHK2396163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d0b755ce906e271fedb3333124d1cb2a227cc273c84fc9ca15a37f14bd7631. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZMHL2375194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e19f38b69297814834aebf80951823e011da7bc4063da143ded1af5514a00b4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMHP2385571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8df9680ee09459dcb45febbbafe03a2ee73fc441617d1a0fed3afac3a2a5bfb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS642325397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f61911630a8d147cadaae71884949612f099deac3874cb407d5e0409bd41c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZS652352878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3d7b3926ebcf3072cdab7b2a4a2889bf836db4b2072864c8f837ddc4f6b6bf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMHP2303632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759c0b21cb347f778475a063c332bff5fac092336c4e7f29a118dbae98d7a2c6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:31Z), 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/QZMHM2389970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edeba5cc7eb3ee810196e40c2daf52857a4bcbde89272ae46d5754309ee1363. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:55Z), 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/QZMHN2326600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc9462096a66602474e8377bb8e2b85bf426cac6e5f03ba99cc3b4ccd29aabf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHM2373653.