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 0xd825fa199b06b485161cdf5cac1dbdc7758c6303a9ad09f6f4255dbab04934f1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db0d2973-2a19-4458-980c-20640d76a366.json and https://artists.proofprofile.net/proofs/artist/db0d2973-2a19-4458-980c-20640d76a366.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony in A Major 'Fire', Hob. I: 59: Andante o più tosto allegretto
Joseph Haydn: Symphonies. Archive Live Recordings Warsaw 2004
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 0xbe00727da40df0c719473b2dd39ea97105e57a215438192999fdc3630027af70. 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/PLC702416002.
Symphony in A Major 'Fire', Hob. I: 59: Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0bd17a700229abba4e7be921df83a3bc81fa5e65926ae166a3000794f056b0. 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/PLC702416003.
Symphony in A Major 'Fire', Hob. I: 59: Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a54529801e5282843f47c3acee82db7c3c36f9836b1cd27b5200aa67ce05a. 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/PLC702416004.
Symphony in E-Flat Major 'Drumroll', Hob. I: 103: Menuet. Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72282c3fb5abaf0e0f15bb6f6618836b8c1dfd67d4503f788d1ab726ed3d7dbb. 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/PLC702416010.
Symphony in G Minor 'The Hen', Hob. I: 83: Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02cd8b8712e7f75e0927df90073c7f7524c1e1fa74909c779460e75d393485c. 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/PLC702416101.
Symphony in G Minor 'The Hen', Hob. I: 83: Menuetto. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c0c51b2796cd8a1a819e9a1dcc627ba4363c91049a2fa3788dc45c7a1cf5a2. 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/PLC702416103.
Symphony in A Major 'Fire', Hob. I: 59: Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ded2defe42c1bb255a07ad08611adce3e2afeb9a245578dd4662f25bb22cf8c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PLC702416001.
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
Aria of Rosina 'Signor, voi sapete', Hob. XXIVb:7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1951efb815b9c054aec498b9bf106ff6c5d85871b13871c7f7ef79857c725f. 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/PLC702416005.
Aria of Merlina 'Il meglio mio carattere', Hob. XXIVb:17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e21d77723b2ba038fff15273620700fae6f92a92a165f1c9584ce0171751c9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/PLC702416006.
Aria of Giannina 'La moglie quando è buona', Hob. XXIVb:18
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa675a80d873bfd958a9d154977a1c377c2a5b701ef37c9449458e8ed66c2962. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLC702416007.
Symphony in E-Flat Major 'Drumroll', Hob. I: 103: Adagio – Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864919a5cca478bfb362cc33b5c28ab242095825ec07a88f425b7fcf04a06be5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/PLC702416008.
Symphony in E-Flat Major 'Drumroll', Hob. I: 103: Andante più tosto allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7844cb35f25237ebdc85f4c0dbe4f447d4c5a3f73acd523e8bfbd4a2b8cd7d52. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLC702416009.
Symphony in E-Flat Major 'Drumroll', Hob. I: 103: Finale. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4924586e8708f4ae0fbbfdc5d121a014c366716da8822eba27240fa0e7541. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLC702416011.
Symphony in G Minor 'The Hen', Hob. I: 83: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d28c3d83d2a3fe6e374ef06654f8cbebf1c2a98e27ea1e17b5ee4edbf6dec18. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/PLC702416102.
Cello Concerto in C Major, Hob. VIIb:1: Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f25849d8432dfd11bcd7dd5ca000cae5fa83bb1b38b19a10105334818172b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/PLC702416105.
Cello Concerto in C Major, Hob. VIIb:1: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7423196e2e521ff6136f91417a9e7760f620d737cb9a683fc5044d2eddb392f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PLC702416106.