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 0x28235e798b5f5285536e10e532c394459103173c357246d48b749f6fe99d6fc7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0833188-38c7-42d5-a92d-bdf5774494c6.json and https://artists.proofprofile.net/proofs/artist/d0833188-38c7-42d5-a92d-bdf5774494c6.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 0xe4d83d997894579c056cfe3db1976ff981f1594f4fbbf5a228936d11d0c778ec. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US8640528204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924896f69791c4b776c3aa30c9838165ee1a524ea4c66a854eea3120a0c156d5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US8640528205.
Round Dance in Beauty - Sin Baa Dahozhoonu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b75d75cc9f1ed9de3bbc686014ccd47111084daf3f450ad75e74c9bccc7ca. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US8640535602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb079966a77c038d9f2498db611c6284e9ba602a50b1c2b9ab5d2891e838cbbda. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:08:12Z), 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/US8640535609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5804ded9f218204a1e751c722bc012860e22b9f64b5c3ecbcca793c86933f8. 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/US8640535610.
The Colorful World - Songs from the Dine Heartland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91583a5405cec1dafc79fdb96d74c50e8742b340694c8013d925234d67c7be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US8640540301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1798c3a467ca50a3e15ce687fac64173f216a73c1e00dc1e5488443ecc8e703. 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/US8640540307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8a8559f8a83b2977d4a0f202627d57755670d3632802719177af02fd353de4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US8640540305.
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 0xce95ef44fd997c1c360f7973e1df832ee4005d9a8dd682d9ee248f92e0d54c22. 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/US8640540309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3539131de2bd2d701e183c0e33759b664625f3e75e7592b9c0d21f936d080c1f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:39:58Z), 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/US8640744001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dafe3d879746bda7f5ead42d98a681bcd93210b0d9a5f5b1bddef6007dcffc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:47Z), 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/US8640744006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb3cf381eb33cddbb349fa4417e4b363b7d8f81d7f0d792793d43e79a8491db. 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/US8640744009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2869d7699923d9d30124bcb81e06b9c289ca26cb42b3f971fc00ab2208f3f0d8. 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/USDY42102281.