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 0x89e273c8095bf09be1777113ff22037b493c49ab59887f1daa4c5ac7500628c4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3ec05de-0ac0-4ca0-8c76-a65db7a164c0.json and https://artists.proofprofile.net/proofs/artist/d3ec05de-0ac0-4ca0-8c76-a65db7a164c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Running Blind (aus "Sing meinen Song, Vol. 12")
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 0x2ba56ffc807d44743b070b01cf2dd594910869172ba560e82d3e7f4ba29ebb53. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:53:04Z), 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/DETO32500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55766c7c5c460ab596ab8ac01b14262b1a481feba85a1030b6ed333f6929d189. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DETO32500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a4e2ee87e129666668923c3d16e3d56c4ec90fb3c8a53a1b8c6b7ea89b381. 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/DETO32500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882bc99766f3585167e13710f6470e3be841a8ff936eff952048cb6e478b324. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEA812400661.
Mieze Katz von MiA. bei Sing meinen Song, Vol. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55766c7c5c460ab596ab8ac01b14262b1a481feba85a1030b6ed333f6929d189. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/DETO32500200.
Wendekind (aus "Sing meinen Song, Vol. 12") - Duett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f35ee18d7253be5be8af8ef7a6e7bd7489f8b080260436a1be9e0080318c5c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DETO32500236.