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 0xffb614b00f15f40709dc20388243b0c3d83d4a852ca861a773ee832c0ccae5dc. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec4ae170-3a9e-43bb-b8ad-4859f5dd232f.json and https://artists.proofprofile.net/proofs/artist/ec4ae170-3a9e-43bb-b8ad-4859f5dd232f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Fog of War: Invitation (Arr. for Piano by Lise Borel)
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 0x01abe5d353c74655ec44d3a2acd66e53d02518c13fdfc670a82be9a3b1cd808b. 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/FR50X2287101.
Le carnaval des animaux, R. 125: VII. Aquarium (Arr. for Piano by Lucien Garban)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f46eb758d3c2619f868a345d818c8b29cc2c4035d5d13e5616046be3c14e472. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR50X2287103.
Piano Concerto in G Major, M. 83 (Arr. for Piano and Octet by Lucas Henri): I. Allegramente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f4fa8c695765796a7bcd3555d779c1c8f157beeb98eb58aa759a1d09821ae3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR50X2287105.
Piano Concerto in G Major, M. 83 (Arr. for Piano and Octet by Lucas Henri): II. Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caa6f993ab44c04cbfcc168c269c3ee6dd2a5ee834200eb69ab54bf8f52dc31. 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/FR50X2287106.
Sur la planche (Arr. for Piano by Nicolas Worms)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa458ed143cb4c3d929cf49bc0f812241c9105d9b19917b225a3544647d9a7583. 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/FR50X2287118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ae50361849450bf574158b2dd6b9c9fe2cf96f389dcd8db83bfcb4479307de. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBAYC1700419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b20c1e5f7a6f3d43eb9ac3e00318cf27b5598f29cceda327cb1b8816d43ec9. 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/GBAYC1700420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae038f98d03e54e4addabb1dd8408303029e81e371c13d634a63618a47626031. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC1700421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60365f46c7553438de07d12cf070d97870017952fd9b9cbf30b52d431e3facd5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAYC1700422.
Piazzolla: 5 Tango Sensations: I. Asleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde19adb07e03efc881304c0c3900f49a5ae1399a08df498a071ae8486bbf415f. 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/GBAYC1700424.
Brahms: Quintettes et sextuors à cordes (Intégrale musique de chambre), Vol. 2 [La Belle Saison Live]
String Sextet No. 1 in B-Flat Major, Op. 18: II. Andante ma moderato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0f3dc1c7421cc1e2ffa7887043e7c56dab44034bc8ac2e59beb8f078b4af77. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR9W11809282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daa2e39e6c2996ee35541ca9aec6075ee76a97a2382b58ad5d8e41362adefc4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEKB72012845.
Mendelssohn: Quatuor No. 3, Op. 3 & Sextuor, Op. 110 (Live at Deauville, 2014)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99511fa34fb07974479fbc2ba4a325f047f2d4671061a95dcd3eec3a7ee39b53. 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/ITN322220855.