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 0x1f041d3dea8c5cf4c537e7b605bd35b69c315eec0e8b8b35fef4f3a21a11376a. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17628ee6-aea7-4765-b295-3f3b15ff281b.json and https://artists.proofprofile.net/proofs/artist/17628ee6-aea7-4765-b295-3f3b15ff281b.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 0x9eaa74f5b754a9c78152c077619aee5fc1424fa3b1933354ecffec1bf7a606b0. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZHNC2300649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30164ed9bc9adf8112a9d88d719110ceb799d1d8c130732b3d488c05ebacdc8b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZK6J2358327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a3a1f750e0460ef7c5533526a1893b52e5828f7863690beea15db0cd187475. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAS2378197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b94c26a74a6777fd87e596e52f1c8e90d3f295c6f52850c06450870ed6c8c02. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTB42312877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44463af969bdd3cc11e71e1bb93cc44fd5ca10277bdd2fd2d44dbfbb803d6109. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFJ2308279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea36847be6efcd72a80520f8c1c4ba54cf432929757423b3ee791e264950a475. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZWFQ2371050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3458bf657445dc2258ec18de422566c79a57d1cb2046ce09c7d4f3dac830ab. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN92477982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3321161e8e62acb3c33b0a2133965585f3a181e4ddc1597effe656e0cbfa52. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFJ2480658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50cf173f715ffaee622e5107933c7f38ebf8d01ac28a2f7ecdfb215c06c0669. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7Q2414468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cda5ec88038b177b021c94fa7ce37b9fc45f6c3135fd187540b239103a04a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QT3F42426467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb603b7b205d8df1f4928a694b82f84e71f4b2487fc4bc637eccf5b67138239a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWR2405985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9256b64382f37699cd7ad5da72ab87e287be72a369741ce7f705910e5c38f9. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWZ2482211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa203fed1e4d7f83bbb2a45735b201db93c3b1cb09642e712085b5ed9427f937a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZES82454600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3458bf657445dc2258ec18de422566c79a57d1cb2046ce09c7d4f3dac830ab. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZHN92477982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedc23ee31747846335d317c9f5455655a5468c610b69e4d0a0696b05939a8e0. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZDA82324065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc590fed94a28b58512e704f22db7dbc26ef367dd1a2e0dfc66b6fd983ec8e0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZPLR2351332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30164ed9bc9adf8112a9d88d719110ceb799d1d8c130732b3d488c05ebacdc8b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZK6J2358327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9281d5f5c8b175ab73a92f70742a63bf59192394aac9cc53de3641993d85c803. 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/QZK6H2413995.