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 0x585508efbe6faafdfebee934290a1f77c871ed64ca99641b3e3e83ceaf269fad. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71a1acb5-5623-4597-b054-ba7968f9c1c2.json and https://artists.proofprofile.net/proofs/artist/71a1acb5-5623-4597-b054-ba7968f9c1c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bruch: Violin Concerto No. 1 in G Minor, Op. 26 - Tüür: Angel's Share
Violin Concerto No. 1 in G Minor, Op. 26: I. Vorspiel. Allegro moderato
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 0xdad86262298acd3cb8a5ad5465930c43aa165d2b65d9844141b84b5e225f2b32. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBYDS2500206.
Violin Concerto No. 1 in G Minor, Op. 26: III. Finale. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23738bd3be2d625ef0951c613308a3d90d402b78b8c745223229e6aa0de2810a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:48Z), 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/GBYDS2500208.