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 0x20254b2ea402bd439eee3a718be73b00e1e1f641e9a90fb9a0c32dd785ef583b. 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/f915636c-d34e-4eee-ae30-0f06233e84d2.json and https://artists.proofprofile.net/proofs/artist/f915636c-d34e-4eee-ae30-0f06233e84d2.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 0x2f165ed6c391eb738766cf86cda240da73d2b9a345779fe08495c3fce6cdb475. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA371377748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c22e71db8c086e926877537015cfa8b875fe4bd86e9913e7290f675957b9dc5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA561241368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acb0fa0f0af4f78246cd1541edf5abde5f69856be0f4f2ee11897b9e9679bf5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMBZ91389850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c75d126ba77be65e49ed59311255bfca355e0a931c6241ba15d59c76010fc5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:04:31Z), 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/QMBZ91389866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb42ab8f21612ad18c3c797d51310be61adfd8dd68bdbe3ad21a2d452bbb1e2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:26Z), 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/QMBZ91389858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d46803fed65e68de1e427e7b00406f55ec15170de339ab79dae95c0933d70. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:51Z), 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/QMBZ91564313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8499d533b3e34204a3efa237411f59fc9f66e432eef826968c8e3d43bf367c. 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/QMBZ91564314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caff52e80711652c483177d9afa5468165a173be88126423d0821a4f542a316. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM4TX1853642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a77d9852305865092d203accad8d741d4dec6fbd047adeb5ce903a69be128c7. 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/QM4TX1853647.
Music Steps of Crete: Cretan Musical Dances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef625110e454b02fadd8d92f9dd32cddb2ff9b0ed134b8e8a61189950127aa8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6MZ1984818.