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 0xaf9c53d96692d83518eb172e897e6c74ce3519cd2b3710f343f051bd1290bc55. Chain 2 (Bitcoin): anchored in block 953943 (2026-06-16T11:59:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/213da1e8-3e09-48ee-a4c2-0d3af0f3320a.json and https://artists.proofprofile.net/proofs/artist/213da1e8-3e09-48ee-a4c2-0d3af0f3320a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ariadne auf Naxos: "Ach! - Wo war ich?" - "Ein Schönes war"
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 0x485eb501b96001d522d160c9cba46967e25f56680c82524c36790c72efbd04f6. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/NLA508402910.
Ariadne auf Naxos: "Die Dame gibt mit trüben Sinn" - "Wie sie sich schwingen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106e6d114634d6032d448c92b782b18de976b6ad46622c41d03ef5388a45c69. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508402913.
Ariadne auf Naxos: "Hübsch gepredigt! Aber tauben Ohren!" - "Eine Stör- rische zu trösten"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf747d0dda4c023e6ec7053ff96ef81b58bcf7e3afe7acae63176f5320ad099f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508402915.