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 0x335b5c85053d87cd83719011764fa247891db403b6c9aec4211f6eb01b403fad. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83a838dc-2bcd-4b91-b25b-38a745f2f368.json and https://artists.proofprofile.net/proofs/artist/83a838dc-2bcd-4b91-b25b-38a745f2f368.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 0x8c34699e4c461f6fa86b8440bb0662439b68968cec5df949ed1499197f10e428. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR8GV2018940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f10f4108606757940d66b98865b40b3cccb4e81b31f701c0502caba42b52e4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR8GV2018950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa029eace239a15d8a8bb6388a6dd358a9e0ab66215816d4a07b05faa1f48aa55. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:08Z), 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/FR8GV2018850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86d1e1c94f6029ccb050e06f1f2c988b59276b1eece3269781e2909db06185b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR8GV2018860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b442d7d02bdf4cef29f7323c95fbdd419e53369e81a892bb5a0a02241475bd. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:28:42Z), 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/FR8GV2018870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbfe8b0e854900ff3a63d1c30ff4ca5397c25d7878b9db3a59adee8ec933ac6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR8GV2018880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638ecfbe3f7e85768bbf0828a5f5d57159c9d2209c05f47b558c07300b771ed1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:26:45Z), 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/FR8GV2018890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf6a1d6401e880e5c63eb904e33dda32472af741263689d15e50dd78c0c083. 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/FR8GV2018900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3230e6b416e925661b7f4e383cf7469083ab345be768d2ce3cc5ed79cbd0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR8GV2018980.