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 0xb9de0076d661b8f113e8e6edb27b153cddb8115bedc99666e3400a01fdaa6b48. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a501ec26-0435-4e40-a10e-086d4988030f.json and https://artists.proofprofile.net/proofs/artist/a501ec26-0435-4e40-a10e-086d4988030f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schumann: Märchenerzählungen, Op. 132 - Bruch: 8 Stücke, Op. 83
8 Nocturnes, Op. 368: No. 1, Moderato e cantabile
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 0xdaedee66a30abf7ff4e424711815c908b01fc60540aee337fdaf22fcdaff0a1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI192341301.
8 Nocturnes, Op. 368: No. 2, Andantino animato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85600e634ef414a7794de0c21d7a55273bfb120d8895d6d5fc03946257e5792b. 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/HKI192341302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad1754ee388f0c480f835b57282425a8bf9a7a23470d15dd1bf61a3bb881883. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI192341303.
8 Nocturnes, Op. 368: No. 4, Andante grazioso e con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6e13b0ecb64dc4570d5b4655db232fe430324e5815d299a3ab79e7cede1e96. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI192341304.
8 Nocturnes, Op. 368: No. 5, Allegretto grazioso e con anima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4911852dbe3624b9cb1ccb9be686e63fa0c2b24ee347160b8c6500f219d2e. 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/HKI192341305.
8 Nocturnes, Op. 368: No. 6, Andante maesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1999ebb8f06f695c6f48017ec1a535443b4702e954e8cf6fa7e0c0c2a4f6e37. 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/HKI192341306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313e5e9bed077f419d733cec7c09ff82a153aeef26e8f9c89b654d5c52d80b6. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKI192341307.
8 Nocturnes, Op. 368: No. 8, Allegretto con anima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b9f08449828054899fca9ab72e1cd198f7a056a00787b129350f3ab6d91275. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI192341308.
Nocturne sentimental on a Theme of Strauss, Op. 537
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea83f8f4fcaa6a4e90c182f4932153e72b147702c5a8d27358c9655ca7678ace. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/HKI192341309.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 1, L'hommage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f19baa2595f2c614d93cd7c4f668005078c14cdae50cc617e34c9d9e9d879da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI192341310.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 2, Le désir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f017a983573d6bedc68e26f961469c675f1e0dc8de136968d9f4417e87ea0e3. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/HKI192341311.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 3, La persuasion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d37bfe9e7b6caa2e99ef4153b03863051e74d5ca9de5519df2d420292eadc4. 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/HKI192341312.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 4, La colère
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6e02d92be43db25311b397481b5b051b944de737900c84b979c07242af5dd2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI192341313.
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
8 Nocturnes romantiques de différents caractères, Op. 604: No. 5, L'excuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1d071875a9043eaf2b40c5e5ea6f8d636c271c25957172de6372d8fe774724. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKI192341314.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 6, La consolation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb0388deb197333acafde9b2eff91ee15f7eb6bad51327f44e73b839d455ed. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/HKI192341315.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 7, La méditation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057456ebe6272f13f5593b78f6b898f2356f7511570a26251b58b21337b5cea3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKI192341316.
8 Nocturnes romantiques de différents caractères, Op. 604: No. 8, La joie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4dd33c59ee5f44eaf8d7a231fc754d63474be10ca1eada219c31ad62a96d6f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI192341317.