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 0x5f7f53eefbd7b74afeac2f4367275b53563728df7debdc8f3ec62dfd7295a582. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ac29316-9b85-4dda-a9ef-9ffa787a7bba.json and https://artists.proofprofile.net/proofs/artist/4ac29316-9b85-4dda-a9ef-9ffa787a7bba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Concerto No. 1 with Trumpet and Strings, Op. 35: I. Allegro moderato
Shostakovich: The Piano Concertos; Solo Works
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 0xdbb48631855ec2629b844268f05c1513ecd4f4aef6491925628810fab7cb554b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEN962401501.
Piano Concerto No. 1 with Trumpet and Strings, Op. 35: II. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf56b733ebce210c900cdb576850d46f9ddc9846b3fecc545ab4e153e86c69df. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962401502.
Piano Concerto No. 1 with Trumpet and Strings, Op. 35: III. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfcfad02cb62b9f0848feb0dc5e74f0edb5a006a136fbb8d679c1123a8a5b07. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN962401503.