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 0x197842c20244ae0588755d6d99dd0ca18139898c2d8e12438504ca5fece1d508. 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/7893880c-79e6-4fa1-87d2-46499c886b88.json and https://artists.proofprofile.net/proofs/artist/7893880c-79e6-4fa1-87d2-46499c886b88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Staring at the Sun [Specials and Singles]
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 0xad9b9406866a1aa6e7f3ba4b28d8d736548aaef5c35dd76d09c88c6bfb32c97d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:49:53Z), 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/QZDA72471581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e91f96ac0069a5aeeca162691a9131cc087486193ebbac22e4d5db52f50c715. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72471583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb2d422a4e1a6feb0ed49714217f599cae7e4c0581705d0f4b878404cce1964. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA72471586.
Song for a Lost Friend - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9a00454de2666564f94f8c89461b3816cd08c05d200c17def2e8c69db5a635. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:47Z), 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/QZDA72471588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0383e5edef80778d134318eaf1095d179c00e0be875429b0fae7bbf9abbeb38d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNA2429696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad55ea7234ac5d5377ef860a0a88bf212c02365a3ffd1c76e0fe07f389305915. 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/QZHNA2429701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb747f5a8763485c8ef1e5ea30da3fdda63cf6d1c325126ba5adfa6abaa24349e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2429704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3724932cb7e8a00aee7484d2ec88eeecdc58f20343864a6c0e79c91ef1e5cf5c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:50:05Z), 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/QZK6N2511348.