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 0x39a48b7c431b6d06ce19a0dbfb44cd45371c4baee77b463d7bfdc1049b4e0059. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87492042-7f76-4c38-957f-c57b07b1cd38.json and https://artists.proofprofile.net/proofs/artist/87492042-7f76-4c38-957f-c57b07b1cd38.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 0x5d25457e258cc8953ee443a9e2f2a4e0b8c5a0e95c1cbde2a4590c2c5e60252a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU0036790.
The Greatest Christmas Medley: Rudolph, The Red-nosed Reindeer / Schneeflöckchen Weißröckchen / Fröhliche Weihnacht / O Tannenbaum / Kling Glöckchen klingelingeling / Alle Jahre wieder / Morgen Kinder wird's was geben / Jingle Bells
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2382104d68d2d52f6f956a8bb5ab1cba748e0ca187ca1432e3c05740e7eb67. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:37:12Z), 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/GX4R52306152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa27044a6be43d0a528976ac943462a56a85fa8465d1eb4c5c95f2b12478c6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBDS2325448.