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 0x60d11773e3bf300817902667bfaf8a78510c2e9a5719f9afd333bee65661d24a. 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/e6621ff8-7aaf-43eb-9f0a-acc793ee4e35.json and https://artists.proofprofile.net/proofs/artist/e6621ff8-7aaf-43eb-9f0a-acc793ee4e35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0bddfd465e4552bcb25250ad8489e0d315b4d45676d8fbe81ce8cd952fddc5d1. 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/GBELX1003254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f7532c6e4a9e1cd3287aadf1cfec1d5363f3495286f1649129ea23240bbb0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBELX1003255.
Sonata in G Minor, BWV 1020: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d05bba3f456233378dd81b78b191e8c548a3eb342a20adb69586732973df35. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1003256.
Sonata in E-Flat Major, BWV 1031: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa436d53c44723c5f2052d3ab6195ccf0050c2c416b880f30c609f578c4b5b82. 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/GBELX1003257.
Sonata in E-Flat Major, BWV 1031: II. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf249b8915b4b3ed059badf261dd67ea19fcfa64563b7d3d76af2904c991168. 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/GBELX1003258.
Sonata in E-Flat Major, BWV 1031: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe129c17b3cd5db10f7e2d9d06b614cd7da112628f32d1787b4c4b5259c4974f. 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/GBELX1003259.
Sonata in E Major, BWV 1035: I. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac2eeada3c1ad4e7374b3dd62c7206167a3ddfacd1ff80bec58e5b7d2c9c27. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBELX1003260.
Sonata in E Major, BWV 1035: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67f307bd75cd38d688a245864227ca40a3996fb5b321888e31e6ee96df923b. 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/GBELX1003261.
Sonata in E Major, BWV 1035: III. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20c393e4e2c850526e01956d094b88150e287fd5e24b98a2104c5582e06e848. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBELX1003262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9930231e3b3037e0cc961f001a0b225977cd5a8ac4b489206fe8612be4d6be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBELX1003264.
Sonata in B Minor, BWV 1030: II. Largo e dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bbd07ce39af20e7d1358eff1735ae9302e575f86f7ffc4beab898f1ed21596. 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/GBELX1003265.
Sonata in B Minor, BWV 1030: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b85014ea47ea27844ac298c61e4b24ff3d74b1ab056af33fb8a0bcfce53ffd5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBELX1003266.
Sonata in C Major, BWV 1033: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1b0ccf2c4a0f8e62b3d30ba8916e17e338181f2bec2bde1e514b42f2cc189d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBELX1003268.
Sonata in C Major, BWV 1033: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab18c60a6b579b4aa5b39e655a223c76cc2d27a6bff928ce095c18e24ba124b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBELX1003269.
Sonata in E Major, BWV 1035: IV. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2be4533d60644cc996aa1927207c75db5b7d90215a1b01f0ec52da1a04a18e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:28:29Z), 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/GBELX1003263.
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
Sonata in C Major, BWV 1033: I. Andante - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f650618b2fdb3d42f68ed694bf19b7d6b5713bd2134af3902a3132e3af81623. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1003267.