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 0x4a21c1fce5427007026974bd758c700855d2e951dc9fb194fe0ed45989ca0735. 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/d2f6b5a7-5388-41bd-b67e-18dc2a5990c3.json and https://artists.proofprofile.net/proofs/artist/d2f6b5a7-5388-41bd-b67e-18dc2a5990c3.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 0x2177603c3fbb6659a6667ca1b765bcd13944a3865c11d4688bf321914fe2bf3a. 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/QZDA62331011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab999552319625100eda64357f0ce7310a4635cd8d8b11ca6df5e95f0f306a18. 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/QZDA62331017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e38806a701545255424162a2f96371ac6ac5506284a03f17fcde563dae942a0. 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/QZDA62331022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4ebbda17efe71c8be6c138e646ad0a33f4720203ea162c98ee565afaa3d977. 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/QZDA62331023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4407d042816c15f500834499aa374ff66e4414a13d79d7c121de8b7db991310. 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/QZNWZ2312728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82a7d9dc9f7eb265665a01e4ee32bdfa07743f6186339b8aa0c3d3b801340be. 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/QZHN52307294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c797be1e2aaaa34b93997a331f17b1a0e21af47cf485dd74859795d5e9c4e3. 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/QZTB22260718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdee9d83a9f6a15eabf50a5a76bf2f0deabd0df8c5e35da1b3d6760bbd69c008. 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/QZTB22260719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f9ce5bc351ccc0330102e9e21adffc6e8f437f5d9d0ccbfa3844214d72b86. 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/QZTB22260720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776cb4d2d20cdc6c49e786418cfc281e6403d998ca1429c0e0bd90c1ff49c88. 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/QZTB22260721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4dd9ca6eefa6c4c7ac46f4ce10c9dbae49ee9f6d5bd896ef2e014b707673a7. 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/QZTB22260722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8bd9a99d0330385b8e639c5bbb327afdef9695104fc7b3ecfc571f66e8b75. 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/QZTB22260723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a5b378a6316217fb6fa1f71405c32e0a2fbaedf92a4c96e867567023412dc9. 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/QZTB22260724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7599cc210d7a559da6b02280577beeed7e10ec189c17b67c67cbc586b4e7fb56. 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/QZPLR2215383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef79096376e1f6542324950d1c543d86e0c0eeeb5d169b97af9f7e98e851e7. 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/QZPLR2215386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8641c10eef08abcb198c06c311a52d665b044b40e0cc96f06de153901deb78. 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/QZPLR2215388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c48012aca23294b54dfc11bd88c437e13c6aae4011612af2afe27b668b635. 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/QZPLR2215391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2a63f0b2c76416c9b0ec6a23eb7f743438e503f00993f96d933d3e012ee95. 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/QZPLR2215392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd456ed0c98ff8f2835661cc303d33ae228ac7488e1a632324ce83a431c29b51. 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/QZTB42243311.