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 0x918ed2c290f450a6d3ab529803abdb19768d7b4b656f28b1e419a0640587cad3. 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/ae2d6485-43e7-4c1e-9752-bd5a1d8cb478.json and https://artists.proofprofile.net/proofs/artist/ae2d6485-43e7-4c1e-9752-bd5a1d8cb478.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 0x8277f36ccaff09451dc4cbcb81a003d26052b6e53f839f5a3d811e6c71d6cc23. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZHZ42276152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bee6942dc2fd10ccaa5341efdb20a82a1864fb4032885110896254c0cd5572. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNJY2200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce65a92a02e8677678e7f6edaea5add8287c15ce7a22747b4c0fe3d87fe4bee. 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/QZTPX2211042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277218718d68e2c1063d4466b78091a5795cac9c06e0e15ace4f669aac6d0702. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/BC1WJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2feaabee23a7ce07e0e8a9d10e2dbf01c8ce4217a1367bda443fedb35334d2f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BKN5G2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1ff0802ff8f6349eecd6b506a93f09812ae6ea65a6b35b9b1cd4805fb98ff9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BKN5G2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b7ad3f222a96670573e094b67f7ce91f0a6f324a1995999067e0123c9f7299. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:16:45Z), 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/BKN5G2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912833f562272ee721a0cc48bd4b356bbb233df1c87215e70cf094ca432b116. 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/QZZ8A2423298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26569eb1845d7347c7e7ce4b1dc1d7d109cfbc86967c2fedcc851cfbd5516dc1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8B2483087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d620553a27a59f97d89ed6220dfca3d6ee96263c931169469a5b104b411e5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:03Z), 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/QZZ8B2466443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a06aec51c5e9053e2c151ecbc90618da9ccb007c11008cffb64967fb0f6bdd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:53Z), 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/GBRKQ2576765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9b110bbef8ef67bb88e22987c425fe326b18bb37ba250a75efa5630d5031c5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ8A2599536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50878ee244e29eeb818851633c8bd2139a820309636acbd93a012f1a4d1fd4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:00:19Z), 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/QZNJV2347019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2f3e1c10a4d20a802fd2c60356254af8e531b967cff8220ee39750fa0fd16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKLL22400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77f216cab7aa963307fabb0993cddf83e67f7ad5a6066fe2b79d0944aa44da6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCRK02400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd189967224aa9ffdf698b4ed1a40d170728a75b7e42a8a8357dc30af2a03f90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWDD2216080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3a871a676abd508edce0fe47bce8c0428dac8f1167c9d22a346fff69a8a85. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDD2216075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8080ee754354bd453b39212fe6cbc58f19162e79833be72c6dccc23c5a811a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTRX2371737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cc050897c9b326702ca22851e81794fe2af08bf187d4f0d1f5f76c64503d0b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZZ8B2368719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeabc6c454dfc0c0582800d38e56d92d019373de7faef1b71a1c657059000bb2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC1WJ2300023.