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 0x272aed20fe6398b0122fa70cb04cad1edbdfbb29748044fc6c71f6ffa28a508e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45eef675-22de-4ef7-9289-a166618d8682.json and https://artists.proofprofile.net/proofs/artist/45eef675-22de-4ef7-9289-a166618d8682.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heut ist so ein schöner Tag (Karaoke Version)
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 0x86fd4010e814bb364484fbf75176850c5fbac1621bb284e4dfc12182b06655da. 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/DES120102250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbca6b8a85a504788edb112d05f566230ece646c9181a8d3ac44e9e9a1300c7. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DES120102264.
Always Look on the Bright Side of Life (Karaoke)
Tie a Yellow Ribbon Round the Old Oak Tree (Karaoke)
The Total Eclipse of the Heart (Karaoke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bcdf66f813e1ef1b0841838f45916b59554b1b620c7ea23b0d1ec1c3441a38. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DES120102508.
Rocking Around the Christmas Tree (Karaoke)
Raindrops Keep Falling on My Head (Karaoke)