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 0xb893bc2d7c56c724e73e873e4394f5b00834b0bbe005ea97ea3822ee6bf4620b. 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/407a45c3-cbed-4cd8-8274-753d6578a0ec.json and https://artists.proofprofile.net/proofs/artist/407a45c3-cbed-4cd8-8274-753d6578a0ec.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wiseman: The Nightingale and the Rose (After Oscar Wilde's Fairy Tale)
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 0x066fe6e57b365b77684169c4a7497c86e41145810d84173859921f631876b0e9. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEA800005100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e2ec4f3855aea431411d9dd88eb4f2f9e223e350f00fdf7643ee1aa22af73. 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/DEA800005200 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f8daa538faa9807cf47a00fe573e5857d61a4315c27f05daeb99161f821d83. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA800005300 — a six-check JSON result.
Wiseman: The Selfish Giant (After Oscar Wilde's Fairy Tale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e1863211d90cca3c45b56b25939434f440245ceab95223ed2e5783a19649cb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA800005400 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Introduction
Richard Strauss: Don Quixote, Op. 35 / Don Juan, Op. 20 / Till Eulenspiegels lustige Streiche, Op. 28
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47bf6527d9c4d4dd9c304f533bdbc421c8d81aab956050e173570701aa9253c. 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/NOEHX1915010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b8a4e8a16d2802d6881bbd1a21e9bb63a64530281ce87dc09cd10b68c04712. 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/NOEHX1915020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb9b2b2b604bff5aa066940b01b830176d3edf20a110a9ba5952d70d7b4c1cc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1915030 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation I. Das Abenteuer mit den Windmühlen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc5036af9a7b2f9ba06e0ece8a6df8cc468e0db022471edec86de2ebae754a7. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1915040 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation II. Der Kampf gegen die Hammelherde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf260a1c4924e143af8b601d139e18f0714725cddf6449129b7e6e1f3147ce620. 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/NOEHX1915050 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation III. Gespräche zwischen Ritter und Knappe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7988f1aa08e084d0c1c969d58ee6ee599fe9cad893febf7c7f0c70173aa3f1a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1915060 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation IV. Das Abenteuer mit der Prozession von Büßern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba10315da5d587dae5a395bfe272b225ca5dc9aa2afa7f01a2354fba39a00a0. 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/NOEHX1915070 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation V. Don Quixotes Wacht in der Sommernacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea9bb9da66553de9626b204a96104999bc6d9796ab054c00f12a95dff7fc6b. 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/NOEHX1915080 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation VI. Die verzauberte Dulzinea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20760189367200dfc3e64f509ff40aa63f1d57185076b246cc0732fd20eda71. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOEHX1915090 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation VII. Der Ritt durch die Luft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef4283283d5fdac0bebf288f111cd46e056ef799c85fc581a479a27f50c6624. 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/NOEHX1915100 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: VIII. Die Fahrt auf dem verzauberten Nachen [Barcarolle]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b8f91daf90d1860fb71632232e6b67e173ff357a01d3a65d228803538b008c. 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/NOEHX1915110 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation IX. Der Kampf gegen die vermeintlichen Zauberer: der Angriff auf die Mönche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d4d8f8cfe217c212e349eef812eaccc430526fba62cf2e48839275dfbac1b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NOEHX1915120 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Variation X. Zweikampf mit dem Ritter vom blanken Monde: Heimkehr des geschlagenen Don Quixote
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a35c62c364cebb64079ae322cbdc4da10c93901b3702f7ef0b76e3b2adac9d. 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/NOEHX1915130 — a six-check JSON result.
Don Quixote, Op. 35, TrV 184: Finale: Don Quixotes Tod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f2bbf0ace0b0f3c16ff6435b3e92034be1fa83b8876f84941e995a6d87596d. 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/NOEHX1915140 — a six-check JSON result.