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 0x3c2000de5d95dcede09603d479251d72e5a530aa6dfd6adff1a3746322a88868. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d37b54be-3725-4436-881b-bfa4ab782b50.json and https://artists.proofprofile.net/proofs/artist/d37b54be-3725-4436-881b-bfa4ab782b50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schumann: Piano Quartet, Op. 47 - Brahms: Piano Quintet, Op. 34
Piano Quartet in E-Flat Major, Op. 47: II. Scherzo. Molto vivace
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 0xced842439b2d8d5ed236377462a515d6db37cede588904ad2672f59d95b5aacd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1758020.
Piano Quartet in E-Flat Major, Op. 47: III. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f84855ba485cf1dd6f58150b6f39b4f14147cfbe566dd7da0bccb556366263. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1758030.
Piano Quartet in E-Flat Major, Op. 47: IV. Finale. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aefe4a98d2d45b774b15f58b05844ed9c7cb198873e49045fb2fb1981a20171. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1758040.
Armenian Cello Concertos - Past Meets Present
8.4, concerto for cello and orchestra: 1. Massis
Armenian National Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6bb599924c4358b4f84648de804d0bc298b249915e0a2e9b87188ee80dff57. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2248070.
8.4, concerto for cello and orchestra: 2. Sis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d820563a6b5eda2db01be54b36c5cae3227df7213ec7f5e19d5c46a726ac71c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2248080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523ec840f2d7f555a3cd7ef6464c859ecf7b9617a5ed265bf8bef3f3c9c0b0c0. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAES1158050.
Cello Sonata in B Minor: III. Maestoso - Presto (Abridged Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09c370ead513cce3dc12941c3fcde5d4fab2b141d020cd359a0574843d495c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAES1158070.
Weinberg: Cello Sonatas Nos. 1 and 2 / Cello Solo
Bridge, F.: Piano Trios Nos. 1 and 2 / Miniatures for Piano Trio
Phantasie Piano Trio in C Minor, "Piano Trio No. 1": I. Allegro moderato ma con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef58c39ac09900e203b1932328b613ceebdf585a4ac2c5e01ab4daf1e651aa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836801.
Phantasie Piano Trio in C Minor, "Piano Trio No. 1": II. Andante con molto espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea24589f6de8d467f50bac6555cf71cb078811b5716eec32ae4911c81d614e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836802.
Phantasie Piano Trio in C Minor, "Piano Trio No. 1": III. Allegro scherzoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70e1fb28fcb846d77f6d577428332bb9aca64e6b0785c918960a255b1878d36. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836803.
Miniatures for piano trio: Set 1: No. 1. Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075c4007599f4557f12418f0aa83ea557a98bc9d6b3b74979a6b0259533d6d37. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836809.
Miniatures for piano trio: Set 1: No. 2. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d101c76cd6cba08c6f85ec120c670699b5b784162f9f91cc7c82ce3021e5819. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836810.
Miniatures for piano trio: Set 1: No. 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86985d6eed54701563d6bb26ec6d61711c12c79bca330b3291e181cf626bf029. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836811.
Miniatures for piano trio: Set 2: No. 4. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5753ead25854fb0db922ff786414f42a0815fd2783d96de20b6bfeda0051d069. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836812.
Miniatures for piano trio: Set 2: No. 5. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccae22e9b3fe244257228366a85f45e5752ccbf021123302db34446f8b0d6d41. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836813.
Miniatures for piano trio: Set 2: No. 6. Saltarello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167b77e1a86a0c0e7986d4251ccbe0b46ced9f9254ab28559cc4ca3f02915a23. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836814.
Miniatures for piano trio: Set 3: No. 7. Valse russe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28518c7d210641acdd9b8d29484741968d848a3d7154d16ff4dea0b5ae20d61. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836815.
Miniatures for piano trio: Set 3: No. 8. Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180cbc73f1ac1845f1a0bb38d93f50c4e2d9950c991feab982e0f23825dcedfa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836816.
Miniatures for piano trio: Set 3: No. 9. Marche militaire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63d541467257c8f285c0afc039d7bae664a9e78d900c629e3a22cc6ec5d3dd5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190836817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b1039680996c4701b4bc52f959c872574b8f0334e47c360d7efbce40420e0d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199837503.