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 0x3db86f796855268751d3b577115062d084dd9695bcf1b99bf6b802e4d852dc4a. 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/7dcc9b0f-800a-4936-b744-a7662b7a341b.json and https://artists.proofprofile.net/proofs/artist/7dcc9b0f-800a-4936-b744-a7662b7a341b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Dittersdorf: Sinfonias On Ovid's Metamorphoses, Nos. 1 - 3
Symphony No. 1 in C Major, "Die 4 Weltalter" (the 4 Ages of the World): I. Larghetto
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 0xe09feb756bc15c439c67158429b3c3e87e6eff9f94bd7c1aece028b2fcdd2ac9. 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/HKI199370501 — a six-check JSON result.
Symphony No. 1 in C Major, "Die 4 Weltalter" (the 4 Ages of the World): II. Allegro e vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442f0d21bf6223e68048c2be733eb5e7af859a1441d4ce2ae6aa058bdaad4417. 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/HKI199370502 — a six-check JSON result.
Symphony No. 1 in C Major, "Die 4 Weltalter" (the 4 Ages of the World): III. Minuetto con garbo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af2c2b36dcaf33410fd72df638415b7a0cfae27aa145fd28f4fb4eb85a307f2. 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/HKI199370503 — a six-check JSON result.
Symphony No. 1 in C Major, "Die 4 Weltalter" (the 4 Ages of the World): IV. Finale: Prestissimo - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867fee8df85fe387a8f55b2dbd90f6403b1e88b885275e66ea1101ee8ba8a12d. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/HKI199370504 — a six-check JSON result.
Symphony No. 2 in D Major, "Der Sturz Phaetons" (the Fall of Phaeton): I. Adagio non molto - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259c1dcba07b26e3518dafd5a47e3c45089822d2994256715d6ca1f98b0f6df. 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/HKI199370505 — a six-check JSON result.
Symphony No. 2 in D Major, "Der Sturz Phaetons" (the Fall of Phaeton): II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd164edeeaf2b7cb24dc6a040af00480754135119f48caabf87a7d2fc2b4b82c. 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/HKI199370506 — a six-check JSON result.
Symphony No. 2 in D Major, "Der Sturz Phaetons" (the Fall of Phaeton): III. Tempo di Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea84a39aa917cdfbcc610c1a2a7c14767b88a6fa7e2aa55db412aa30c53ed0. 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/HKI199370507 — a six-check JSON result.
Symphony No. 2 in D Major, "Der Sturz Phaetons" (the Fall of Phaeton): IV. Finale: Vivace, ma non troppo presto - Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a8c5a7360f097d9970cc51d9171b24cd28b7218c78b095d5fb1bad9c9c2123. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKI199370508 — a six-check JSON result.
Symphony No. 3 in G Major, "Verwandlung Actaeons in einen Hirsch" (the Transformation of Actaeon into a Stag): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b63678fb55a7dfe83d37be7bb4524c9f06110b1bc72123c07f36c3300bb83f1. 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/HKI199370509 — a six-check JSON result.
Symphony No. 3 in G Major, "Verwandlung Actaeons in einen Hirsch" (the Transformation of Actaeon into a Stag): II. Adagio (piu tosto Andantino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78284d79a410cd1ea6f64d67c30be9b28d378e386c18e08652f4f7973d8974. 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/HKI199370510 — a six-check JSON result.
Symphony No. 3 in G Major, "Verwandlung Actaeons in einen Hirsch" (the Transformation of Actaeon into a Stag): III. Tempo di Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62f82d80a9ca8442338a6a147b852e79ac2f30c121ac0e46422575b23934e83. 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/HKI199370511 — a six-check JSON result.
Symphony No. 3 in G Major, "Verwandlung Actaeons in einen Hirsch" (the Transformation of Actaeon into a Stag): IV. Finale: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255aab0cdba1401afd1b803a0b1b65fad1daaee4a4036a6b90ae97cf6350c4c0. 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/HKI199370512 — a six-check JSON result.