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 0xec7ee9d75008b9b3989a6d39a5878cf68179c4ad444151685cfd249bc59ab5d5. 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/d491e511-2171-4098-a408-3ebaac050576.json and https://artists.proofprofile.net/proofs/artist/d491e511-2171-4098-a408-3ebaac050576.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 0x1fc257051e77008cbed34c8fe8e45e3227e8150501f52eee4bff9e03d47628c7. 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/FRX872124114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7b68b8693615fd0f45034936bf0818407c771cf721e0cd721cc202000b6b41. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX872124116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1987dcee7ea9cfd426d2e528d44a6d190cdeef43c2f9a832b96992c0c6cbcc96. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FRX872124118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e74669496d93916cfe0b34e8716073edefd9b45f939bbde7a798bfc2142f3d6. 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/FRX872124119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c1e598c9deefa978237af33dacdcb99e9ed3f4208baa71899b1cf139d945a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX872124121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51c2a4a576ca0d003ae8d1d46d56613beab8ce847449e83748149578edff8ed. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:49:55Z), 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/FRX872124122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa566e615024bde60b8376241f31d685c17fc137c5f106ea073d1ed2dea86f56. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:58Z), 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/RUA1D2469159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3ffd1504f7df0d087406a9ecff48862735d72fb61fe5d23d9bb1c1d34b71a3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/RUA1D2476852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99ffe4c6363609d430a1f918bfa1289936e9972cb734f8c3b6bcc873102e23. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/RUA1D2460495.