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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ce2a5b3a13fb81ce4c55c01909b9c68822be8b1a367357ad7dddb99a026417. 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/694791cf-c1d1-451e-a390-f3903e083f5c.json and https://artists.proofprofile.net/proofs/artist/694791cf-c1d1-451e-a390-f3903e083f5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Best of Traditional Greek Music & Sirtaki, The popular Dance of Greece
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397a12566ea2bbd1e8ab4b0f87937dbf0b31695068718caf87d27b1dd84ce2c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR0O70838232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1e9be3df212d9cab1e9674cbc47c68bfd9fa003e6c030811a887b0c47e67bb. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/FR0O70838233.
À la vie, à la mort : le temps des adieux (Musiques choisies pour cimetière et oraison)
Lettre à Elise, Polonaise héroïque, Marche funèbre
Conte Symphonique Pierre et le Loup (thème de Pierre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bef58f2d953fb24e50999f6f4e27d67263c512beed4dedb8d6fae2c08c2b6a3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR6F31368320.
Suite pour Orchestre de variété No.1, Op. 50b, Valse No.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd84533fdd4bd6f8a9190624bfbed07339d2f323fb8028b282bb8dd10a04f5e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR6F31368360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0a4b692a658f7cc61b44c2407812c16c04f0d0a1a497190a816be8d172911c. 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/FR6F31368500.