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 0x2aa27a931cb1ad937cb251bc7b2bd22a3bcf34900d7e1970585a1f7081804ed2. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/657cfb41-5eae-4324-9dcf-c13f3c91dc10.json and https://artists.proofprofile.net/proofs/artist/657cfb41-5eae-4324-9dcf-c13f3c91dc10.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die 33 schönsten Kinderlieder (Kinderlieder zum mitsingen)
Die schönsten Weihnachtslieder für Groß und Klein (Weihnachtslieder zum Mitsingen)
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 0x1c0e6b72776ae3c9ce2635f2abeb57d8be50443f29dc234747caeade3a905c14. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2X41406701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ece39cf5bcf7b960bac7b8a2e00d6de956e3a57988cff42875fd50db7b5a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR10S1646646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79349007abb24383f6c9ae1dcbdfaa7cfa6376527bcb761f8421e2c768b7afa0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:26Z), 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/FRX201783614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff8605ecfb9a7119cf4e04d88d5e69218abf90373bc7ed69a5e1802686e8533. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FRX201783615.