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 0x34bb7968dad3bf4e74a49808943c07b160e7d405cf5dcd56b7563c90adc66e5c. 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/7a723df8-0299-4a57-88cd-33f465e84a85.json and https://artists.proofprofile.net/proofs/artist/7a723df8-0299-4a57-88cd-33f465e84a85.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Esa-Pekka Salonen in Verbier (Bartók: The Miraculous Mandarin – Schumann: Symphonie No. 3 "Rhenish" – Sibelius: Symphonie No. 5) [Live]
The Miraculous Mandarin Suite, Sz. 73 - Live
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 0x1f11a3faaf0637806c50582362a6dfb6a7e8641672ec285ecaa6b573fe25321f. 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/DEN962302540 — a six-check JSON result.
The Verbier Festival Celebrates Rodion Shchedrin At Ninety (Live)
Double Concerto for Piano, Cello, and Orchestra "Romantic Offering": I. Moderato quasi andantino - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb258c11613fd9f0a3745ac10a6a78c57bf3ea7ad511c51fb8131ef53f1403b13. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEN962202661 — a six-check JSON result.
Double Concerto for Piano, Cello, and Orchestra "Romantic Offering": II. Allegro - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065e7e8a96ff50eef86a4a78f66d89758d0d79f80087d3e88a87a5843033a6ee. 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/DEN962202662 — a six-check JSON result.
Double Concerto for Piano, Cello, and Orchestra "Romantic Offering": III. Sostenuto assai - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9a170a90ab4f61a65f03a4b556dcee0f5dbc277d5f9832a2bb241c034eb260. 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/DEN962202663 — a six-check JSON result.
Ancient Traditional Russian Melody: I. Lento in poco rubato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb584e3d3e641603abe33afdc9c6d9f5a5789ab96c793967fb02b720ab614e0d3. 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/DEN962202671 — a six-check JSON result.
Ancient Traditional Russian Melody: II. Allegro, ma non troppo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575058795361360d7bba32985bae3e36f2a621148dbd3a38ce5cbc80ad3de63a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEN962202672 — a six-check JSON result.
Concerto for Orchestra No. 1 "Naughty Limericks" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7e3cf08d4cce99210a1df53ba1b95a306f76a6d54fbed3070ba8dcc99f256. 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/DEN962202690 — a six-check JSON result.
Piano Concerto No. 1 in G Minor, Op. 25: I. Molto allegro con fuoco - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98533cf404a346ca69554887131b0044ab56326e0eac3e0ce8aa58197ba8d60. 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/DEN960902821 — a six-check JSON result.
Piano Concerto No. 1 in G Minor, Op. 41: II. Andante - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc6e571a66a8512bf6048d8c87e6f42fe72d90be83910f177e0918658c1961. 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/DEN960902822 — a six-check JSON result.
Piano Concerto No. 1 in G Minor, Op. 57: III. Presto – Molto allegro e vivace - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca0902139fa706f2304357b4e1802dde244727829eec79d68a9646eb19ca0f. 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/DEN960902823 — a six-check JSON result.
Piano Sextet in D Major, Op. 110: I. Allegro vivace - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf331d495d83f1f9beb9520366bc4e9bc49d9fc32709e88eb7b17ff0c5f4cd389. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEN962200311 — a six-check JSON result.
Piano Sextet in D Major, Op. 110: II. Adagio - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2adc76780de940301108f0ea73f843400a52007e31f2c84f201241a7d4823e. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEN962200312 — a six-check JSON result.
Piano Sextet in D Major, Op. 110: III. Minuetto. Agitato - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dda61bde13ad25181e0eed95ee6fbe8d9e35bed18b19fbd2bd80d0033af8f5. 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/DEN962200313 — a six-check JSON result.
Piano Sextet in D Major, Op. 110: IV. Allegro vivace - Live at Verbier Festival, Switzerland, 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e35b70f13c1df4664e6e7bfa9fc9c2d4cc21a6cc3f9d7adab4fb45f2ddb34ee. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEN962200314 — a six-check JSON result.
Die Walküre, WWV 86B / Act 3: "Leb wohl, du kühnes, herrliches Kind" - Live
Verbier Festival - 25 Years of Excellence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0044f9b2140b221d8c54ce23e642ef8743b5fb2d7bf80fb8cd5912ceb914814c. 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/DEN961331012 — a six-check JSON result.
Suite for Piano and Orchestra: 1. Snowflakes. Allegro vivace - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6126f64396884f32813000d40a2be52bb90bb1a649bee22367811c826ac63cd8. 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/DEN961305181 — a six-check JSON result.
Suite for Piano and Orchestra: 2. Lyrical Waltz - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c55da5c35ed8f71e6d1efe55b4f9d09a342c869209774b1dd6d07e3c872afcb. 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/DEN961305182 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca0902139fa706f2304357b4e1802dde244727829eec79d68a9646eb19ca0f. 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/DEN960902823 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98533cf404a346ca69554887131b0044ab56326e0eac3e0ce8aa58197ba8d60. 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/DEN960902821 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc6e571a66a8512bf6048d8c87e6f42fe72d90be83910f177e0918658c1961. 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/DEN960902822 — a six-check JSON result.
Suite for Piano and Orchestra: 3. Polka - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4d958f345dbeea48cb57f95abbd542f6a868bc10b589c96b84fd027dd5d7cb. 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/DEN961305183 — a six-check JSON result.
Suite for Piano and Orchestra: 4. Career. Presto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc50eebaa64fb9a9543642b7357abee9b6d1ffa17a4ab6ed8da7465ab5d8487. 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/DEN961305184 — a six-check JSON result.