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 0x1896bba230a75cbc56b70273a92dc764f92e76c43b3a3287cd8effaf503049da. 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/15819808-383b-4a4b-a02e-17e0937707cc.json and https://artists.proofprofile.net/proofs/artist/15819808-383b-4a4b-a02e-17e0937707cc.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 0xbe98a25f0059e77d3c41d832fe39bed2b91a84a38dcf7ec1cff1280fa600730c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82042422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900bd9b61df2ebce030fe963be4c047ac2b4e347c33e54efbe0b92e8c6d14aa8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES82042425.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa45f5b4b0ecfe2ba0fae35d2a28065c1569fff759855ae66a3bd7ef0ddd20e2. 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/QZDA62170200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea9a92ddd1548748638f797f3d9515f1c6cd690d0364962505be0318503a036. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA82304558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13514f363e746bb3780d071d07646005f0648949b24189091af924c85a5b00cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA82304561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9637a18129302f6d2b12cf6e20798aa8ff64e8a14c99f41a329d72eefcf4ff. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA82304566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7883f4ae30989ecc981391129c92132e575a7743612976ae4d0a25cbeb696454. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZDA82304557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eeda1e33cfc47afc4f7673547d4b51b27eb70ef4d7255eb8da52bbf51d5d0a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA82304559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512445eedb73f5e458a8d72851019fefaa55a3285f1a0910ca62a57271c995ec. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZDA82304560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c08cc1355bf1c31d1d770d32a96fcec8c567c572cc946f89a2a7950a73a27c3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA82304562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5c94f4aee42e626f20ad6aa7be26f64aeb079ec4a5aad203968b3109c9cd62. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZDA82304563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4581fc0faeeab74d00deb75fe9da8fa39e07f1092737680190a14238a62725f. 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/QZZ7W2435302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9090c031eac79bce14f109911a49883df42cc4345008526dcd45aa07dc18dc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN52511357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a273a501d93b3332a4b3221f88d210aa95bf49a94f4ddefa38d2a0d59aef31. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN52511359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645935ce5208a13add9d135feeeca45dce3053b4bfb9559f37ee62d3acf9eb85. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHN52511361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06cb3e18db05e6a922c53e40f4ee2bea6943bc2135ece2b63d4a2fbf9516764. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN52511362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950c11369b64372d95c660f3aba61b85f0b748ae240e8f232653b6b4254d19c7. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHN52511363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec91e7fcba776f563e1a74758ebab4ce8a7753afc92ddb8100a7b5b5fd3a39e9. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN52511364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4581fc0faeeab74d00deb75fe9da8fa39e07f1092737680190a14238a62725f. 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/QZZ7W2435302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb692e373fc0afb3a8eff688736222db680b6b4e8f968bf1f9eae3a3135c47229. 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/QZHN52511366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61f64a731a23faf78729c9d28761afe75e50002fec35b5ba57e55cb6369b489. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6K2596656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ea5badc5df28933911db38a846a72de6aef6fb20beac2852674d684b1901a1. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:58Z), 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/QZK6F2594072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ccf735ef84167da6765657f9a3fef63510dbe5a2c6c0a5d80fb0a62bce7bf7. 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/QZK6F2594073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad5085259825499552f92e20a7e11503553bc408f2340ac78aeaf11880379b. 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/QZK6F2594074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6d7770689d2dd9900762502a48b7a247e71e71d4f8db267f02feb2b28ae4c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFM2586304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce034d09f7beb4057c30c3c57e54158760c073826a2a1cbeca9f9b5907a91b4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZZ7R2522366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996bf7fdb51566537d219df4a6af4d12e4429254fc7ea9d0742ded8f0ad6b238. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA82377218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e179a37fb1e03ae2b5a32de7eeb7576f5ccffde362798371c1d6c450439101b. 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/KRA382205869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0e63bc071de84f8d0cbb7e318c07f5801eb8b2a99cd50935efd7d3b83b3b1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN32397017.