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 0x83b042463d120eec651cd7061159444625c84fac40d96e46703c463e33d88a9c. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6cedab7-29e5-4b43-a203-9cf7121a7a7d.json and https://artists.proofprofile.net/proofs/artist/d6cedab7-29e5-4b43-a203-9cf7121a7a7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schubert: Ave Maria, No. 6, Op. 56, D. 839
Gounod: Ave Maria, Arr. from Bach's Prelude N° 1, BWV 846
Schubert: Ave Maria, No. 6, Op. 56, D. 839, Panitti: Ave Maria, No. 7, Op. 13, Caccini: Ave Maria, No. 3, Op 18, Gounod: Ave Maria, Arr. from Bach's Prelude No. 1, BWV 846
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 0x98ba7f30a33627644eeb3ffbb6d17df49b875b45233bdbf1dca7863fc62a3b6e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM21241860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f05b56e2a8bc187ae8d73f52e7177491847b514a327ca961797a087955fb5c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM21241861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f30a8fbfb6e57e8c1b6a70ce7b6262054ccad93ccc91d08cfda11a1e8b8ece3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:56Z), 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/USHM21244603.
Ave Maria By Schubert, Saint-Saens, Tosti, Faurè, Panitti, Cherubini, Caccini, Verdi, Gounod - For Soprano and Piano
Ave Maria, Ellen's Gesang III, Op. 56, No. 6, D.839
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ad176102a4508fbf7802b32fbf1f3689a5785fa66cdcb3d61f1347bc9e9b5e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:46:21Z), 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/USCGH1396675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aee546d365a8e029bc6c9840acfe54a7601872dfc65c450758d1f14969e0a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH1396682.