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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e9b45c574e7763366eeb1939d37e92a5f4a2caafeb64d0092eeb9227a91450. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cbb479b-f63e-4c7d-a2a8-f0ef72e2245c.json and https://artists.proofprofile.net/proofs/artist/4cbb479b-f63e-4c7d-a2a8-f0ef72e2245c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Primera Sinfonia en Re Mayor: I. Largo Allegro Poco meno mosso
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fcf7a5e77c0ad0d8444de16d66f2c35c0873c07ca08e23ad10c1d804daffa1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWSJ6110701.
Primera Sinfonia en Re Mayor: II. Andante Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c1e7d988b0c5afc1a527b3d4892d47452b4a467440f443c28c6b6215fc5b6. 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/SEWSJ6110702.
Primera Sinfonia en Re Mayor: IV. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b791024c69c83fc9ed195793ae7a589edda249a3aec49fb363923321db38816. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEWSJ6110704.
Tema con Variaciones para Orquesta, Op. 2: V. Variation IV Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead3d828595cdd86d1d3795eccdf7d636aa01a8190bbdb9d8d8c49fb695c23dd. 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/SEWSJ6110709.
Symphony No. 2 in C Major, Op. 7: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce82ddf86a952bee50c3d8200007b18288256f82d0d8b0a9224f5352aec5cf88. 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/GBJZY2058301.
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
Symphony No. 2 in C Major, Op. 7: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc3ce2a22ba0de2fe58edcccdb61ec492933555b6f3444a7dce26aeee1e69e2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJZY2058302.
Primera Sinfonia en Re Mayor: III. Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcd75d28c338bc6cd9d8aa519070b5fd2a40a01896b4c3b680039f6c39ea71f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWSJ6110703.
Tema con Variaciones para Orquesta, Op. 2: I. Tema Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d338ae2ea8013b59244b86036681e94a078d07ba0379dba2fd6f826dc2629c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWSJ6110705.
Tema con Variaciones para Orquesta, Op. 2: III. Variation II Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf147aa7716fe34a1370ce5e96c68ca31058c3a5ea20f20218eaa86304d0450b7. 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/SEWSJ6110707.