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 0xd555075687c5ca41805da22988851a0b99d042fe6b2efc97883dda0c93d74f89. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98596db4-9aeb-48ae-b8ae-8d97fff8f41a.json and https://artists.proofprofile.net/proofs/artist/98596db4-9aeb-48ae-b8ae-8d97fff8f41a.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 0x9d7e3658f79d687328f64d76d9c2221a3be555d78d756aba7cf7e23ffba6ac9c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:31:22Z), 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/DEH742512736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb1260cf572fe1921edb07f08a1f51b8849c08a834bc917a4046f13f851aab4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:07Z), 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/DEH742512737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213331ef0916a701d4060c911b7e3decd3b646c5e78df39aff4085f812a15a43. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:22Z), 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/DEH742512738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d77be8221c8be62e7a593d3cf8737b294ae4ad832329d905a2553ecfcd152a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEH742512739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23ab2e154e36e5f4531390be3f0b897404e3b3e9ac76041bd5dbcaac5c86a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEH742512740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf4f6876a5c1b342aafbaf36f46cfcb65d4649369f25b25940993b777eaf25. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEH742512742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4211d341a5068079eb587ff19768a2f279f6cf9f1e686c1374b029a3ce962cf3. 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/DEH742512744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3196ea7c31b5737e605730ab444e99b7ab3c64432e64cbf8116840e0448bc4d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:04:54Z), 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/DEH742512745.