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 0x098bdf446e3a0a6837003fe80e654548e45c0b288123ecef6b4e51d128404bee. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dd4f694-4bea-496b-b186-4c63d78ff8c6.json and https://artists.proofprofile.net/proofs/artist/7dd4f694-4bea-496b-b186-4c63d78ff8c6.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 0x1dc2a9c7322893a8ff78a16b60005503a7305df8f83f25f5e9622d1376b470f5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:06:09Z), 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/QMDA71389894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47afabf5ac9eb678ad417847a9be8acdf4f37ec1582fd9e2a46990d304ba56b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QMDA71389896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bb0ab3f291773d866527b4535c753ab97b0afe64934ddf4f636a624f92af12. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA71389898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478623a11cec263d3fe301ce5214eec0770c00f8c3790c9a367331d3edaea564. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:09:53Z), 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/QMDA71389900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1adccebdc44186c136918de4d156388f2c7da6e56cf503097616fd2675a1cbf. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMDA71389902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd741df828911cc35ee3afd4626b9cdd2e8ce9ff817e2f703815b7c85c9559f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMDA71389903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6e207ee585dd86e8d96094e49f32b75cf05ac137e26c08bdaccf44b06e2397. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA71389904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e669010433c8766caa0d0e72144864ebe9f81163ff29346069dae8b1712d0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMDA71389905.