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 0x38f2ff8542a353de4d0110a88952badaa65a745a86e91ecebfc68f002c6ea405. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b8307c2-6f80-4edb-bd18-0f3ed39c1733.json and https://artists.proofprofile.net/proofs/artist/3b8307c2-6f80-4edb-bd18-0f3ed39c1733.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Singet (Kirchenlieder mit Texten in Mundart)
Singet 2 (Kirchenlieder mit Texten in Mundart)
Gschaenk - Ein klingender Adventskalender
Was gisch, was hesch (Musical zur Geschichte von Sankt Nikolaus)
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 0xa103582d18bcd0e16882a2c055855165d008e17f256be8c94b4786e39a3849a2. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:20Z), 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/QZTBF2465961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f7d805ba266d91214c7c373758046878e4885f600e77a05eaeef24adaa3d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBF2465962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42896ad822f3d0f47b276469276292f8892fcbc26ebc143c6dd5bca81e5a9bce. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:07:31Z), 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/QZTBF2465964.