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 0x40de0dd6639b46f84cb59c751e4a64653143df34f766a99582c2a059424ce404. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/570463ec-bb48-4410-b3ca-4c4d5a520f34.json and https://artists.proofprofile.net/proofs/artist/570463ec-bb48-4410-b3ca-4c4d5a520f34.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 0xd4684ecc86bd262e8ed2dcbe242ce286701fdbffa1c44522acf2cac25dbe7750. 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/TCADW1836526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aa904c4cb25fc2c2fddb1800421bdd8632bce7e56d3d8db0c8ea22cb49b76c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEN1917796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd565784f84a1406c44d0f7f0e1652de3a3a6642658c9561a0c8be1a34bba0cab. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:09Z), 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/TCAEN1917800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631966d9bbd9e5f991bfc9a027af30c94558c4aa7659ffae5f2caf7a8a3aa72b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:18:40Z), 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/TCAEN1917810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd8dc1628bd620119a1afbade1b801cefe11f86b87d4be0ba5531902be3d19. 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/AUI442200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c124be6d5ff7ebaf8047d437ba7aaf17cee7e0288932ab62576696374ab1a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUI442200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ed31ee8c3585833b08af672b3fc8bd44eececc4a209a32aa4c627b4301059. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AUI442100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f17e2b15816427a0e40dee50c5048de11602c891e55bd7f4525cccb4a13be9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAFN2160967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5cf7103db824635fb636b4e5bf5330396e29b4a936def49760645b181e39fc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUI442200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58514d3eede33d76e4abf7e2b4a7fa749b2b60ee71efe135fdb4d5f1d06d967. 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/AUI442200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6519803fb5e80a41e8883371a843f544c1b65b2490cfd0fa237e0c09cf292922. 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/AUI442200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7f38bc7cd48914951e531bdd92c1c828716a57fea8bac7f55548e522f46b1b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AUI442400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59a7cefabfb5a62da63b356a0d66d5b320fa4d18b7f63119427a398a2472394. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA0Q2435591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59a7cefabfb5a62da63b356a0d66d5b320fa4d18b7f63119427a398a2472394. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DGA0Q2435591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85918ee69cfc87e9ae6f93bd0a0d886d80aa6cd4176ca5c74b14c4239bc77de3. 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/FR2X42506380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddbdcb60afd6c25084dbc90b43e787301bc40bbcaa0ede1a6248af02e696cf9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FR2X42506381.