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 0xa4a0bc7fc8b688d3c232bcc54761f2ae5f3d95314fd4ed5c3979f96d0a639e60. 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/0be9972f-cd23-4525-a92c-291269cc0d5f.json and https://artists.proofprofile.net/proofs/artist/0be9972f-cd23-4525-a92c-291269cc0d5f.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 0x5a0d0c3d165b1fd2a7dac2b34bf010eb03f687666b8016c1fcc5fe7bfb53cb7a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NOAGJ1872011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a632bc3a8d211e36f5a261beea83e056c60603d5f86bbf5a3cf7241f7d452f9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOAGJ1972030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5dfa804aa87bf53229d0b81e197d23f3a274d7ffa3f31b14293d760864428f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOAGJ1872020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85e9a639922401a5c55732cc570c124f62bd12a6768057510a414d0c8574e09. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/NOAGJ2220025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192eb5653eb3bc3d61487e38b2876733fef250f5478bdb3583558c0dfd43cf46. 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/NOAGJ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3411b5daeade504e5242b4815ef398c7f69ed33828434befa1e9ce79c7e2fda0. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/NOAGJ2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192eb5653eb3bc3d61487e38b2876733fef250f5478bdb3583558c0dfd43cf46. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOAGJ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313806ecc19a91ca10667294d57e7237579bc24bca6bf68e4d13db5a7ec7d167. 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/NOAGJ2300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97acb9bfbb1a9ad8d5c7f6ba271605d2df73ca0498fd6b1f9e76665cc36a332c. 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/NOAGJ2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7f2c1879a30d448431441a66dd8ab5f51997c8fea101306a216e463ed7d532. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:38Z), 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/NOAGJ2400015.