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 0x24573356c74936b7c5899a8c4d0bcc35b56c608f7b39b6c68207ea2fda2927b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ada7f536-7b48-43e0-8be5-5232fadf0548.json and https://artists.proofprofile.net/proofs/artist/ada7f536-7b48-43e0-8be5-5232fadf0548.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Contes d'Hoffmann / Act 2: "Belle nuit, ô nuit d'amour"
Opera Arias - Nessun Dorma - Casta Diva - O Mio Babbino Caro
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 0xb2f31efd0c2bb7e0d4e54cddeb6192001b07c58cebf3c3cb68034c88b9a93c97. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:39:59Z), 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/GBF077110650.
Les Contes d'Hoffmann / Act 1: Les oiseaux dans la charmille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6269d95f8f4fe4bc39ba6ff6e0e73de747f0232a0cefceb37269b7430a46eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF077210790.
Flower Duet - The World's Most Beautiful Duets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f31efd0c2bb7e0d4e54cddeb6192001b07c58cebf3c3cb68034c88b9a93c97. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF077110650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f31efd0c2bb7e0d4e54cddeb6192001b07c58cebf3c3cb68034c88b9a93c97. 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/GBF077110650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f31efd0c2bb7e0d4e54cddeb6192001b07c58cebf3c3cb68034c88b9a93c97. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBF077110650.
The 50 Most Essential Classical Music Pieces Ever
Barcarole - Berühmte Opern-Arien und Duette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f31efd0c2bb7e0d4e54cddeb6192001b07c58cebf3c3cb68034c88b9a93c97. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:21:45Z), 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/GBF077110650.