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 0xe9d2f1a7c916d2ce51a3731d1114332d33c4140158f7eb964f88d9f3671debf3. 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/19a49c44-6698-46e1-82cd-91b4737b8c7b.json and https://artists.proofprofile.net/proofs/artist/19a49c44-6698-46e1-82cd-91b4737b8c7b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
4 Little Dream Songs: Spring: Dream Song on May
Takashi Yoshimatsu: Cello Concerto, Op. 91 "Centaurus Unit" / 4 Little Dream Songs
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 0xb31e4f351d716bb554363898d44f632d69c3f830f5efdcfd545f8d4f555fa19c. 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/JPCO02401020.
4 Little Dream Songs: Summer: Distorted Waltz on August
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e6865ef2a8a3839e1e8621d1168a378000eb9f88fbbf9446a47d263c8adbb2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPCO02401030.
4 Little Dream Songs: Autumn: Dream Song on November
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41290ab78013ecea3bde7eeb3a830f7e4bf58368034482d51cc3284d8c7784db. 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/JPCO02401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130d19599da5bddde72a5455dbfbbb066d95aad0a0655a3ca1a363dbcfcca964. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPCO02401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aff3b653c921c1df958c81201104e8632d84f8c919d24aa5fa23aaf9919c4ad. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO02330300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b373e1a31d02bb0dd74a8fa7ab259ed4a14feb3f6f40743cde1283936c6ace6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPCO02330220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bff4e98a8bf7731ac787006c37ebf37655460381488cdf6d9ccdd248f8dcf2. 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/JPCO02330230.
Samson et Dalila: Mon coeur s'ouvre à ta voix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e0e891455c0d181e5927af4e89d16e7026557b07291cdea5206829fad45cc. 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/JPCO02330260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a10c6923ddf2b6e11667f7ef1b62faec3d8c16a155ff5ae2048c69893eef06. 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/JPCO02330270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928afc8c2c124b0ef486774a4f112f1713c5a02826998b6b37df5faf6afae2c7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPCO02330280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe341b9962df51ac4108aa267d34336dac3609b52bffcadccfe714ee650a132ca. 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/JPCO02330310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21323db41a47359c5d0b9b2c0729de84da277bd986a4f39523fc1d1fa909ceb8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPCO02330320.
Cello Sonata in G Minor, Op. 19: II. Allegro scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e4a24b98795172ca49d9e60383fb903174178a6237f1081c36790d3987453b. 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/JPCO02221830.
Cello Sonata in G Minor, Op. 19: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97ab78d6b1c028bc275edb209cc88e66df6f166cf40f1886b4010619fd8f6c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO02221840.