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 0x21d6f923b1f75c349e472d15048e6fc68335bbd1c7d01fe4f609b5e266936ff8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80b7a1a3-e890-4619-8f64-ca968fe28da9.json and https://artists.proofprofile.net/proofs/artist/80b7a1a3-e890-4619-8f64-ca968fe28da9.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 0x7c14ae4c9f118964c0bf09be37face798ce5ed59f1d91a40f63e208c121ba638. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6N62202889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb64b180e9eb679b0cfe74ad08af7d017f9225d94993a64595cb99a11853879. 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/SE6N62202890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7195acbaa5ae72bd812605c19b0469cfa231614a8073ef1c20d1cfef3f926cf. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SE6N62203954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65814f9ddd85532673fe66248459d8d722750439d86b703b58ed22467508482f. 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/SE6N62203573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8e139d341f947c89b4bdbce8beef2de779795644b6e7fcddca81df77913d04. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE6N62203831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab88cf089b8c963b96a49dfe701383ee3ee214e068225f655dbd4a3dc6c64be. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6N62204899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed68f64263bfc96f9498c0eb8bfebfe2e615877fc2dafcd1f09a20e6d492575d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6N62205247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f10a5ede3c8f62944b4326411ceeee720cb8612ae668bf9d1765fd90b58213. 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/SE6N62206269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ef635b6709ad9b40e258c6bd655f317bcfb86badc011f802db8bf65fad51e5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/SE6N62207588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651f5b3dda259e0a0ec1968bdadec1b9d3951d340611d7c08c679680b9c62d5e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/SE6N62208678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46f0ca0c24cbba850ea2b651afa38945e70b83e60e702ef7e27166aae063962. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:26Z), 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/SE6N62214498.