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 0x52fcf5a80b0557c50804bb3827a888760c7c1ed107ce47d85edb3b3f1d707366. 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/d99714e4-faa1-4fdd-bf4d-9fe9b9cdea57.json and https://artists.proofprofile.net/proofs/artist/d99714e4-faa1-4fdd-bf4d-9fe9b9cdea57.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sonata No. 14 "Moonlight" in C-Sharp Minor", Op. 27 No. 2: I. Adagio sostenuto
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 0x8036d9d88470a7a8449fc1ebe1219fa3506d5a828637cb1ce2c2218430123aab. 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/FRZ140632090 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67df0056a76e12514a799a5639ed4b35253cd1ebbfccac546706f5891c318102. 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/HKI190572105 — a six-check JSON result.
French Duets - Fauré: Dolly Suite; Ravel, Debussy, Poulenc etc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f40c07f9ea92bcacf7e88523bc81b690cf47cdf19ef9e774c61d4b1b8d734d9. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/GBAJY2132901 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197200ec7c4be0894fa01b5cfebfb77c84fe9bff8ba3e92d6f33558b432f97d. 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/GBAJY2132902 — a six-check JSON result.
Dolly Suite, Op. 56: III. Le jardin de Dolly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1506254a404a8c9b3fe9fe80c9763c1f3ca6d7db92ef3e07fedf63164f99804d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAJY2132903 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e84765fc67fc057228d23a4ca995cbd4f6df5197ef29b8c747d54080d573f56. 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/GBAJY2132904 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f4cd2501f2e9960183b91e5fdd5055000c91cd1eb99e5bfe32dae47ec07d9a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBAJY2132905 — a six-check JSON result.
Dolly Suite, Op. 56: VI. Le pas espagnol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cab57418156485fa56f636f291851f307a9a10d039fc2414b044a6390d5615d. 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/GBAJY2132906 — a six-check JSON result.
Sonata for 4 Hands, FP 8: I Prélude. Modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eaa33d1ad55a0d7512254160d938b6fb015bfdb7672fd7a0daa5d2d96b8d06. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY2132907 — a six-check JSON result.
Sonata for 4 Hands, FP 8: II. Rustique. Naïf et lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad15c5e8eaf7b95794e723ba4cbd8d61db8f272f6e6cb40c18d8d299eb3bf40a. 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/GBAJY2132908 — a six-check JSON result.
Sonata for 4 Hands, FP 8: III. Final. Très vite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa611841b0401f353e21670446c84a1412c2f7ca036874a30dfbb4a5d96d5a892. 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/GBAJY2132909 — a six-check JSON result.
6 Épigraphes antiques, CD 139: I. Pour invoquer Pan, dieu du vent d'été
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26d788027647731d3e721f3d114f5fe36102c4ec9841beea3841ec6ef46733f. 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/GBAJY2132910 — a six-check JSON result.
6 Épigraphes antiques, CD 139: IV. Pour la danseuse aux crotales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2287bc3ebeb31da6da072e723293fa1180c44db595fb645a5c78bc11e6c912ed. 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/GBAJY2132913 — a six-check JSON result.
6 Épigraphes antiques, CD 139: V. Pour l'égyptienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d1f24fbb0ad8b9615551d2420987c61a64ca4e8810fa615cc14e0d63ac5cf. 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/GBAJY2132914 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108365c333fbae6d3502b44263a4802fe5c2416f0c035b04504b6b419cd7a6b9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAJY2132916 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fafc7484424d1d6c1a7f1e3db166dae5118aa8ff714ff8de12d7791c7428ab. 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/GBAJY2132917 — a six-check JSON result.