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 0x30bc757a4e5d6d1f60758bd964ed3919c4c9c0200046a7407a734ca64624cf7c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc01fa9f-9c7e-45be-aeeb-06898dbbe31e.json and https://artists.proofprofile.net/proofs/artist/cc01fa9f-9c7e-45be-aeeb-06898dbbe31e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Swan Lake, Op. 20, TH 12, Act II, No. 13, Danses des cygnes: IV. Allegro moderato
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 0xf99e21d49b92f76473a29805d9a31c32cc894feee001832ddcf4ba9921502e3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1305525 — a six-check JSON result.
Swan Lake, Op. 20, TH 12, Act II, No. 13, Danses des cygnes: V. Pas d'action (Odette et le Prince)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52fc30991c17b531533d4c480499ff9fc4649fc19c3cff65b4353c0449360c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1305526 — a six-check JSON result.
Swan Lake, Op. 20, TH 12, Act III, No. 19a, Pas de six: V. Variation 4, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb782eecf297c6fea2de945c5fbfaa02bb2ef48a7b8bedac05404ab57c71d6a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1305609 — a six-check JSON result.
Swan Lake, Op. 20, TH 12, Act III, No. 19a, Pas de six: VI. Variation 5, Moderato - Allegro simplice - Più mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6c828bf210f8295747fa5c689e32c9dea7febfad15f6e47766a0df5038277b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1305610 — a six-check JSON result.
Swan Lake, Op. 20, TH 12, Act III, No. 24: Scène (Finale) [Allegro - Valse - Allegro vivo - L'istesso tempo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd91407559911a6e2531cf5ec473e6407cba44ab30e1ada211c7c8987f508fb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1305621 — a six-check JSON result.
Otcenáš (Our Father), JW IV/29: Otcenáš (Our Father) (Revised 1906)
Janácek: Glagolitic Mass, Adagio, Zdrávas Maria & Otcenáš
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e8f4a14be7af289a0b7e744f7fb4328e72bd5dc3f546ae3d1ff4707d1e8c5f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1601311 — a six-check JSON result.
Otcenáš (Our Father), JW IV/29: Bud vule tvá (Thy will be done) (Revised 1906)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eda4046037c0e78f1d87202022f7313ed25e632b3c59ff15716df82082045af. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1601312 — a six-check JSON result.
Otcenáš (Our Father), JW IV/29: Chléb náš vezdejší dej nám dnes (Give us this day our daily bread) (Revised 1906)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61ea006dc87ad1db7eebb93a9b0ff555fb6e5034895b6b760a8a51eb1f9bfe5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1601313 — a six-check JSON result.