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 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 0x7397c4c569ef3a82d001ff1a83d0f446b3187728b467c5333557e7a26fdb4ad7. 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/7584db5b-9545-46cb-8433-00364c902387.json and https://artists.proofprofile.net/proofs/artist/7584db5b-9545-46cb-8433-00364c902387.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 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 0x8f30439036d22e60c57774de11cb407f11dcf1f6b02fa44ef0d7415d3b23b4a0. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCJPJ1926344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0be833b236c465933daee0e82360b78168208f2f9b1b888ab669b30ce274778. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCJPK2092770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2a33dc65e05827fa98f07338524cfa8a8e8c09ecd1cd1a6a7be61ae28cdacf. 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/QZNWY2130346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa33f1882d49eaefb1955f9904b29d8883c823fbe79667de78774a58385a3361. 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/JPVI02300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aca4ad6a40792cb57e8df1aece806a8d9949c0ea125a193ef9ea7dc0c3b65e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPC2493872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9513d7e1af735cfd9902791e6b1295a6c0c8619c45799323bd763eb4d066fa29. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPD2410863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3ee638ee2ffeb056d1da2a9d2401c7ef73c08f0e357112b3541c0402a2e8c. 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/TCJPD2410865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62331f39a19d2265ce75e9c93a4a3aadab4c6d4b0cec29969e42ce67b267042a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPD2410867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3ee638ee2ffeb056d1da2a9d2401c7ef73c08f0e357112b3541c0402a2e8c. 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/TCJPD2410865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afaf35c89cd5b09a7948185f1f57ba4e472ff6bbeca612cdfe93257f4358532. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCJPD2410866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbcae56a67c62c4d3bc4260c3ea35f3a5cb4451f41670bdfac8d0e87151df90. 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/TCJPG2528702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bb98090d0cd4eef742647672037c8ae6cb1a03d7b5afe5d4c5955450d3b018. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPG2528706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585b3eec4d7253d21bef2a7867aa5b6e23cd3b22855adad774d539d15d40320. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCJPG2528719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb136cffcd6a62e08de499d89c28f269547ecdf416eea8a32a8bddc49c7aa37e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCJPG2528721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17fc674b58b95961a217d0c41e10912f8f8ff928e41f03a007b105dd4e317c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPG2531241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1ae2c5ec12edca2833e305333c7e8f9459c3f6d7743b31435748c1246e7394. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCJPG2531251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94dbd36daa8b32fd67af2ac9a4934c425b38aad4d69bc27731e9636219db435. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCJPM2068679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad61c846a020bd1317b518dad519b6da0e17447ccafaf8cb2588738c3dd0795. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPK1923884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef69a053a24ff81082df62da05bcd8ee37da7fbf8e6d2c9ff94d084c2f2459b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA2P1944071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce9da9ba8da5c1fd007be56626943a7be2ef286b16fba2b81478cb0c2b615a9. 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/JPJ902109190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce9da9ba8da5c1fd007be56626943a7be2ef286b16fba2b81478cb0c2b615a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPJ902109190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4895bf57ac188a76f77c852302eb80b170a83329f9d2ae740d500a9c09b5f. 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/QZTLA2210896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5d3147f90d446a75521e9d4134abf08eb6ee2b94fe306e0aa1ea8198d1102. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCJPX2352709.