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 0x18921907d43572f8e5f5943cf9926db471ca9b4f5d4a7df5fb169b464360d214. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3c7f956-a04a-4165-b6c5-8c6ffcb9bc4d.json and https://artists.proofprofile.net/proofs/artist/b3c7f956-a04a-4165-b6c5-8c6ffcb9bc4d.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 0x46de5ea3679064e3de59d6e709cf149dc78e1ad90d1b15039f66d1cd5d3f8d96. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:45Z), 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/ATAW91400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b0786f4caa7c58eaa660597bcb106bdd8821349585fc765f20deec0f2e26d9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATAW91400009.
In Der Volksmusik (Darfst Net Ficken Sagn')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e6963fe621ea510c40c7327dc4dc2e037e6dd252ec8bebdea07708ea0e181a. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ATAW91900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c17c34ee06087540b46dab6aafa9be5f066d3a3069ba51299c32a82b1d2bb7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:09Z), 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/ATAW92200001.