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 0x06344f2374ae0098454499da058f29f08f467fe88a868ddea140d9db224633de. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da75837b-464f-4eb1-a22d-5ccceed8f705.json and https://artists.proofprofile.net/proofs/artist/da75837b-464f-4eb1-a22d-5ccceed8f705.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Symphony No. 1 in G Minor, "Sinfonie serieuse": I. Allegro con energia
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 0xcf0bb3a8d59056580911c266a3186496e4aad2b3cf37305eef43436e3ae88c8b. 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/SEAEH9695010 — a six-check JSON result.
Symphony No. 3 in C Major, "Sinfonie singuliere": I. Allegro fuocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bcd9cfc14beab126d66da70fbd25be1c1044540d8515c673b3738433ff218d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEAEH9696010 — a six-check JSON result.
Symphony No. 3 in C Major, "Sinfonie singuliere": II. Adagio - Scherzo. Allegro assai - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b520050deac4b487decc83d03f0907b008abad8de87521e35bba408cd626798. 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/SEAEH9696020 — a six-check JSON result.
Symphony No. 1 in G Minor, "Sinfonie serieuse": III. Stretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb98b8df96c7127cc059857a4cd0f71ed668d3119edca6e5ec20bdf42fa09186. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEAEH9695030 — a six-check JSON result.
Symphony No. 3 in C Major, "Sinfonie singuliere": III. Finale. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d82348488217361e393db7d95e43f4f00606a0d6d7b9e22676e29bfec17d2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SEAEH9696030 — a six-check JSON result.
Symphony No. 1 in G Minor, "Sinfonie serieuse": IV. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7929888cc238de18ef2d945f676a18548229d98cc707b3c230da52c256536cbd. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SEAEH9695040 — a six-check JSON result.
Symphony No. 4 in E-Flat Major, "Sinfonie naive": I. Allegro risoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b54125966d28b8eb330cb6790a38a832a7f32e88de6a5f7fd2cd44b0a994f9. 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/SEAEH9696040 — a six-check JSON result.
Konsertstycke: Konzertstuck for Bassoon and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6aa4e3aa964ddd6b965013c2f3f0534620e64384e050e800e12e13cfa11f34. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEAEH9695050 — a six-check JSON result.
Symphony No. 2 in D Major, "Sinfonie capricieuse": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698797675eb44ae99c5b17e1321414346f6da2821885964aaf2c8743c22e66a7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SEAEH9695060 — a six-check JSON result.
Symphony No. 2 in D Major, "Sinfonie capricieuse": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2deae6579e02207ae2bd115071c68d02efcf3a1184434560ed5889063a8e53. 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/SEAEH9695070 — a six-check JSON result.
Symphony No. 2 in D Major, "Sinfonie capricieuse": III. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7d887d571fbe9a6b99e19de18545773a92a1b9dae10b79468a69e8711b9ca1. 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/SEAEH9695080 — a six-check JSON result.
Hummel / Du Puy / Danzi / Weber: The Romantic Bassoon
Bassoon Concerto in F Major, WoO 23, S63: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247c5645e7a32149f718005c07fb878b06ce2694e096bdf2772a65ab18c610f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEAEH9405010 — a six-check JSON result.
Bassoon Concerto in F Major, WoO 23, S63: II. Romanza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f41e8e84e41cfca42450ec2eb4e33cf3a61e2231a9397d218eca09203ce58a9. 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/SEAEH9405020 — a six-check JSON result.
Bassoon Quintet in A Minor: II. Andante sostenuto (Arr. For bassoon and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d8a635c6a652c6bb0f0b5fdd3899009e7fabc1e29dea02795fc4faeb1fef8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEAEH9405050 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042d1f8f8ad68b205150a2fd629e6a21306463f4b3faaf6b80534ca93fcfd8b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SEAEH9405100 — a six-check JSON result.
Schnittke: Cello Concerto No. 1 / Klingende Buchstaben / 4 Hymns
Cello Concerto No. 1: I. Pesante. Moderato
Danish National Radio Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2dda756efae00ea84522f0add0eb4fbbe1f084dd9eccc12abb3195e26f43a3. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/SEAEF9007010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0fe96ffc25bb5ec7a40a410e54f8cd1fc088a6f6360bb2b77a0f0327ad577f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SEAEF9007070 — a six-check JSON result.