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 0x3b7244cc9f6a53e2c2b2dee5ed73021a6fd4c0e96cc94be17d344ed2dfff2ee9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e50d6f07-5d9a-4662-bfda-54857ec7f9d7.json and https://artists.proofprofile.net/proofs/artist/e50d6f07-5d9a-4662-bfda-54857ec7f9d7.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 0x91dfeebe156dedd98e8003c00418a3408c41acbfdd67c9dcdc031e60d1b367d9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FIGPF2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eed79462abe252acf4cfa0ff88735f04f7e390dd9e6df6276a34bdb05e738b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:15:43Z), 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/FIGPF2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091332e3d778fa9324c6b13ae8bb4d663a9ccf9f2d25dbbc7d66de4721278bed. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FIGPF2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4de832cce8b43eabdea2dfdfb9bbb226ff1193a60623fb27e37252c94091ad. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/FIGPF2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5216656d490de6056985a317017adb172f50004d270338b6778f76608bb35a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIGPF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fafced294bd84d2edde90911461a9d41ff07536011c6ec3e5e6de23110b7386. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIGPF2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2a2c896b9e95277932c7f2b8a79f9a4231e2607f466bdffc21c208b8ba3b7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FIGPF2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03c822690510f6cf809ccbdfb3b53e332074d8b97f9045a6bd7593f41eb2a49. 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/FIGPF2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8e98b6a21b828a8df7ff5352c2d45d5ffd90f0b8dafaa28f9a8f5eb26ac2a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIGPF2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6387503b55237946a7359bc984f772f227b72ae44e3adc5f9b79cdc75732dbf. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/UKKY82400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b527c85ef842991c40a4d1c0acaa1d18782d687e5bd86d4c823592405f93eb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:41:43Z), 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/UKKY82400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52e85129b1dacccf099b5ad40b939ba159027e6e35af99f66b61d5bea2df24a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:53:57Z), 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/UKKY82400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd89d9ffc14d83b1a61516ee6447a8456dcc545b9e7e383117714123a4b335. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:17:27Z), 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/UKKY82400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f08f85b3dae01bfaa5bcc4d8b9dbceb0289c7d470cf814480b80653fec7f544. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:33:45Z), 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/UKKY82400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493869d95f2017d3b809361fa17734f4f05275ca7e052d264581240afd8b1b2a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/UKKY82400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bb91bdca8ea0c2e13a52d2ffba275aabf127071ec6621b6cc533617e15813d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:43:31Z), 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/UKKY82400023.