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 0x685016717db270e299e82cfee6604462cbd4cd7f464d4c2b6bcf5d7bf0531b25. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc631051-0e80-45e1-a90b-5079b041007f.json and https://artists.proofprofile.net/proofs/artist/fc631051-0e80-45e1-a90b-5079b041007f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto No. 1 in E Major, Op. 8:II Largo "La primavera" (Spring)
Classical Music for Valentines Day: The Best Romantic Classical Music Masterpieces for the Beautiful One You Love
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 0xc1db4912b00b4a92a41b097153d4d3a4b672fcb02f967ec2e52efe48f7503c96. 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/GBG3H1500025.
Eine Kleine Nachtmusik Serenade In G Major, K 525 I. - Allegro
Musique classique 50 : Les cinquante meilleurs chefs-d'œuvre de compositeurs les plus célèbres dans le monde les
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f25e3f47845bd5b421dc3e044da43fff589a6ed7e56b41f0bcda2bb07a513c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBG3H1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636b3b024258edf7d5771bc69df7b3530978dd7798faaa7583263c6f5deb1dab. 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/GBG3H1500008.