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 0xeac7941a88098a3c3740325aa854a49a216de3ba22e474d192b81a427d1d9c53. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f2345af-3dd8-4ae4-a619-568db1f25a30.json and https://artists.proofprofile.net/proofs/artist/3f2345af-3dd8-4ae4-a619-568db1f25a30.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 0x97d1aeaf617768651381beda0d7692689c6b100a118c9daae59321e1aba7eb7c. 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/GBDLM1800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c00db60c9ffd50b1a1e320f73e8b08ba272ff4a878598f4e30b24b9f92832. 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/GBDLM1800317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844341a3969d8634afa213dd1b2e9f6d695f2f6b5fc26dd9a42bdf363d479fa. 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/GBDLM1800318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ad675c485051b2a917b2b2d0abfc3e7bb1078efb5f803c468f07baba2eca14. 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/GBDLM1800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2782aec28ee746ccf602f92a64e7540f27d2f2873f75924808815ff9a7a3bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBDLM1800320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4bfd823529a4cfa06f844084e7a7af94c050cad7b3b578980ad62e3bbd3b98. 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/GBDLM1800321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb96c5ab94f76ad7af5c2ede8ffd0ebb066950116f49a979fd0b5e8fa0bca953. 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/GBDLM1800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f754741c6a0685bba071be0d2574eb323b4fa86b2ee91025f24998285bfd81. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBDLM1800326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554d297e700da9b9f56325aeb95d3ad8589cc47d81ef32014f4a9e95706da9a2. 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/GBDLM1800324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a06c969179c8afccceb341934df318cd6a0f4faac990d6a25b9945b7b3f1947. 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/GBDLM1800322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778a1d14dca3632a04be54a068faddbd34aa266f52f9f2206981a0e2a4fd197a. 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/GBDLM1800323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb8a2b75ac8b761fad3e48fc526c940a92e07f066eb69f76b4f93babba982e0. 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/GBDLM1800329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00becbdfdd88d4701c9c7424b08a77937a4bfd2248cd6e315c76e3ddb4ff1294. 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/GBDLM1800327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c01eca1260abeb980b808b940d1057d7d9e90f60ec3d0e8837cdb41e31e6156. 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/GBDLM1800333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80baab8a9bc1369cac6c4b3157526c33c0ebc79076aa177f7f7cb1f8aca687e. 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/GBDLM1800330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d01d0a7d8bad7bb1fbc76450764df50583bf284e7d2f455b350e183a2a7fc. 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/GBDLM1800332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a143ac0237fcc3534ec76b13ee89afd1a972df63d0e386e9b3209859e84082. 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/GBDLM1800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f630cb858463e6990c8cd8b2e7eb7803222a2e58c214896bcbf9471a776759. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBDLM1800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20f0677f3092733f6faed37834eb3a377b013405c4d9c5464eb42a22d9ffed2. 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/GBDLM1800325.