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 0x97445ab3b0ee1dba204e95493fbd5e0d0d7a17e4f60d9b9adeb03a44de713c7b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58f0c961-11f1-4cc6-8007-0dd61851fdb1.json and https://artists.proofprofile.net/proofs/artist/58f0c961-11f1-4cc6-8007-0dd61851fdb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johann Strauss I & II: Dances for Small Ensemble
Jean Françaix: L'heure du berger, Divertissement, Clarinet Quintet & À huit
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 0x950256d79e2ed7ebb4ee8bf91cefe02f2b3dc5d0586f81eeb58a66f9f5413b17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAJY9803608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c86dfd8e406eb300dda36c3b41932be6f821dd8cc91c59322425d8016c380a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAJY9803613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa0e14c7cf9072bd4fbd4e1e26c23de7eae7b656e60bc1fa6ca378da6412436. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAJY9803614.
L'heure du berger: III. Les petits nerveux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec04c2d7cddc2f16338e3b1e3acf675c3f75330ff3fe14a7ed3e5644ea03ef76. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY9803615.