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 0x27ec6425e419a28bf5202a378f2d6a9e61f72fa298434609bb1f1ed90a88c10d. 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/5a567a1c-a4a4-4245-bdb5-5419a5cd38b3.json and https://artists.proofprofile.net/proofs/artist/5a567a1c-a4a4-4245-bdb5-5419a5cd38b3.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 0x59add2f121d740b97309c7e45126a1cc0903b8990051b1cc9bc3016a79e88fb0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMGEB2006401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13a2cc47f20d676fa735f7b4968751e71ab297bdfb621ee01500371aa4d7f0. 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/QMGEB2006402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634c7423036ded87df29d44aa9545075b3e11c0441d29ccba2ef3d7c0b8f1111. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QMGEB2006406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643f01585794a53a664ebbeec0163950b5d13bf6e343d74cc07c4c942d50645f. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QMGEB2006407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c66e1d6a1da7f47a6e10e1eef6c128952aad13c96b94ca2cc0116f2e69e3d59. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMGEB2107901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1d15c05836392ae8260e5cb280a4caf9ad81ef96294c5f7db41cd39fcf0ea1. 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/QMGEB2107603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa1ddada43c49c4a896bffdf591db6b536709363b3c9abde93c9c3282382b2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:26:25Z), 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/QMGEB2107604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64fb24075c67b1cd188d9a9cfc7c29981a2b8cb9fd8961422262db4c988a6ef. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QMGEB2107605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a9c24c830ea4cfb634420f8ca79c148f6d6011cd30fee2a397f60b7337892f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMGEB2107606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523a311a4f2a4b5fdd7b3c491771d20f19bc8439e15ffd30fc45471740296c1. 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/QMGEB2107607.