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 0x4bd2f797d79ce6df11011f4ee20fd81d7e2f2a883e30b3501d54d8522afa4ba3. 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/ecd9680c-0c62-4062-8bf4-d936c1afe0a0.json and https://artists.proofprofile.net/proofs/artist/ecd9680c-0c62-4062-8bf4-d936c1afe0a0.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 0x084941b1ec3bd717ca1243ab7456e93057cb082771fdf97d47e4ca137493721b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR2X41588922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf109e177b4e24980164e776c98ef70e4053279857f523c83ba1a1ba96c2a4479. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR2X41588926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584e00c281fb57b621e30e4b4c90c6a049e72b761946a1f195101d09879a5321. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR2X41588927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e107242236c942ac63de36570360b943717c1f5e3719fd40e05eabd8f70b14. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/UKJ8H2102735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f48e51f033365ac44aa5082d5ae880df3692978b6d210496a188848abccdc. 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/QZZ662329207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3914862dc749bab740c862fe7a6782e10d43f047e79abd6a49f30a547e37fee4. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZZ662329208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bc7c78b975894aad90e96d5cee9c7f7662161361708fbf735c5e3ed4912b89. 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/QZZ662329209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0f6e598904055516ff0efe1c9f20e645242a2b3cd94a7aadf2b5abba3ec14c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ662329210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2332cf4ff49327ad72245979cf2f23ab860bad9900faa34d60ab527c9f2ce7. 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/QZZ662329211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc298a65de6f0b79eb9257d0503d2bad8f614ab63f66bcbb7ab6d5ebb2bfaffed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ662329214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e3181458f2f8540cfc09655523c741b3df20e6a4c31de593ba099e8e255f4. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:35:44Z), 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/QZYFZ2423347.