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 0x03c5cfe574af11d662352fec1ddc512dfc211175e826398dafd81840afd7166a. 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/bd9b78cf-a25f-4705-8595-d675750dbb13.json and https://artists.proofprofile.net/proofs/artist/bd9b78cf-a25f-4705-8595-d675750dbb13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Art of the Japanese Koto, Shakuhachi & Shamisen
The Art of Japanese Bamboo Flute and Koto
Music of Floating World: Yamato Ensemble
Rondon no yoru no ame (Evening Rain in London)
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 0x880408658283228b33d5b27c206d1c043b4655367c91630d684e58bd0bb20721. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCKG0701720.
Yamato Ensemble: the Art of the Japanese Koto, Shakuhachi and Shamisen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8166ea811d3f7a61f52e5003bab19d8df0c8fb2833fcbd2a000c811b0afe4. 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/GBCKG0501296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc080ef98b0e3fb401337510b2cc69aa39f8372a7e84f01a6f29b15617887e430. 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/GBCKG0501297.
Futatsu No Den-En-Shi (2 Pastorals): No. 2. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95300d02d477adbb6d84e410a34653f9cc202f8e89e892699872cc3cfd854f9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG0501299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6f23c4897515ab9cc5044459e415bbd97ce7047f726498c60c07f673cdb90d. 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/GBCKG0501300.
Yukage No Uta (A Ballade in the Twilight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140d572c37b03ca29a552074957b83b8f9c0f2070a1ec4917b80703d7ee401e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCKG0501302.
The Art of the Japanese Bamboo Flute and Koto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91d3f94be948180407a5fea78fadcc28ef444938459d928924e6b3c83814af6. 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/GBCKG0500916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c6e1e8ba824c9d484ed432d043c645cd7e26ee609b67db088f3ddd6f238c26. 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/GBCKG0500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183f537810f04cefbdb815d32501ca4885de5b3503c9fb28e65e6ff56fc8e9c. 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/GBCKG0501303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d307dcdfc19b7bc5c88c00d23505147182c356cdc0bf0a4ead075f4ba690bb. 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/GBCKG0501304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cd7b66d884314c018df98afb2f552cf07a19160f8b723013d4a86bca9aaa23. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:47Z), 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/GBCKG0501305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38427a9fca7c138e4d0e86a471364a8e10398c9fa3b258cd814985984e5f6e71. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCKG0501308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd3e4e913ae8b2deab4ca457b7aa34634d78926cd14624f2a6f94f2f5f46677. 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/GBCKG0501309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f601eab34758ef64aa669c565e80d7a96e5da63e633aab8662eb72c7e3ca0b. 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/GBCKG0501311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91514955f18d49159762f28f231c43edaf775761c5e31d674d0df6f7204695a. 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/GBCKG0502387.
Clive Bell: Shakuhachi - The Japanese Bamboo Flute