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 0x4a07c97ba1c575fba36c34dd9d888cad01ea73b29d368788fd1c46e558311859. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e35d3fd-4c9a-4bb3-ba32-ae637816570d.json and https://artists.proofprofile.net/proofs/artist/7e35d3fd-4c9a-4bb3-ba32-ae637816570d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn Raconté Aux Enfants (Petit Menestrel)
Symphonies "la surprise", "l'horloge" et "militaire"
Symphonie n° 94 "La Surprise" en sol mineur: Andante
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 0xaa954d4cdf47eeb92d23bd8747aaeb15756e98d8f8a0619b97486e69147ba38d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ396601240.
Symphonie n° 101 "L'Horloge" en ré majeur: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41673f604a612ae8edd0d2884d0f7f9c342420b5aa2e46813f07fc8e2649a7be. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ396601340.
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
Rameau: Six concerts en sextuor-Britten: Simple symphony
Piano Concerto No. 23 in A Major, K.488: 2. Adagio
Kammerorchester des Saarländischen Rundfunks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2c592f652fbf13e28afb2d4584da6a8d056fc5f31537a9419e79034b36831d. 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/FRZ396701090.
Piano Concerto No. 23 in A Major, K.488: 3. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41793208ebf741a8229af2affc294abd1480f13b301a0736b838574393f3b681. 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/FRZ396701100.
Piano Concerto No. 22 in E-Flat Major, K. 482: 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e5e40bd1cfa00c6a48a896370bcf3b0d38bf160446523cc6cf1b39f43ccbf. 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/FRZ396701120.
Piano Concerto No. 22 in E-Flat Major, K. 482: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73abb67de7f7b92eb2d86714008ce6a206d5fa4d34697545a2e0a5f252a8ee50. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FRZ396701130.
Piano Concerto No. 22 in E-Flat Major, K. 482: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109c901522daf85ec06577ffa3c3c63a2d0dec3dd680a8fc8a54b52d05018918. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRZ396701140.
Concerto for Flute, Harp, and Orchestra in C Major, K. 299: 2b. Andantino - Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5338c69b1173043af9bfb7e13c487b33a35424f8540dd1fbe839e07eecf71b. 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/FRUM72200486.