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 0x8a40ef3314d80756e31f998b4fc059d4b28b939a6de4f4f625b79b04f1c0de0b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a7bbed4-358d-461a-ad01-275e3c9b55ee.json and https://artists.proofprofile.net/proofs/artist/4a7bbed4-358d-461a-ad01-275e3c9b55ee.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act I: Scene II, Mělas dělat podlivámě!
Janáček: The Cunning Little Vixen, Sinfonietta
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 0x8a052a73ab61dfdfa534a7018285b4a3359131352033311b4a132a9920b71f1f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035011 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act I: Scene II, Zbabělče, podivé se, jeli už mrtvá?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7538d035d7bc1cbed7460a99db75609900ce1869bf41f44fc879c3f9d76e57. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035012 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act II: Scene VI, Bóžinku, ten je hezké!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19af942ec8adbb5a22141036a4734ec8d12f2b7fe9d4ab79cfaf1b909e8e3466. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035024 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act II: Scene VI, Jsemli opravdu tak krásná?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6db188f21508804d7d4a45997b9bd4516c6fa97b84760f65e058d97a4f712d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035027 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act II: Scene VI, Pusťte mě!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78330d8122ffee399f998dd070f7ba07f97585cae0b0525c9a040fb97de9ac7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035028 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act II: Scene VI, Kdybyste věděli, co já viděla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba650b3cb270a8bd76dd9d20022745604c0d0106473908fdabbb024028a1a993. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035029 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act II: Scene VI, Když je to tak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49431a28e8a012ff6d3c331cc22268065099b4d021edfde58b2d37c2e4552767. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035030 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act III: Scene VII, Běži liška k Táboru
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67c568fa51ae09aac99ff9f40fd5e34190222439d5b51d2024fc6c044dfef59. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBDGQ2035034 — a six-check JSON result.
The Cunning Little Vixen (Příhody lišky Bystroušky), JW I/9, Act III: Scene VII, Kolik jsme to měli děti!?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe984115cb8ad8c548aa55eefc08202b0ffcb25608d2445817d20c4170df53830. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDGQ2035035 — a six-check JSON result.
A Midsummer Night's Dream, Op. 61: No. 3, Lied mit Chor. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37b5b1d40b1435d32d8e400cfdaba8ee38bc455d2389f7287b97333f34088ba. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR50X2300431 — a six-check JSON result.
A Midsummer Night's Dream, Op. 61: No. 11, "Ein Tanz von Rübeln". Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd7f7b2144a6fcd63d33044fd992259cb98d93b06c96c3b9304d1bc01eb195d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR50X2300435 — a six-check JSON result.
Beatles Songs für Singstimme und Instrumente: I. Michelle I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bbb8625b7dc27c72d72a13474f78d2763e572a5ce8b0c41beefa2b58caa346. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEE861902994 — a six-check JSON result.