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 0xa548c0e4ba3f6ad9ea120de2abfcda9088ee0a16dad099629ebf5256e81e1262. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d03c6141-7f9e-4170-925c-3801ad43b835.json and https://artists.proofprofile.net/proofs/artist/d03c6141-7f9e-4170-925c-3801ad43b835.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 0xeb90de20fd84311d5874bd0bb4ecb0cd6b0d4ea0154a5c7dba3d559d7a5d43ef. 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/JPCO09434830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92076e039f4b8d4474d152403c636a80b72337519c8091f3d6ca1b36916dc8b9. 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/JPCO09434870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e705298f8ad0a9c3f346d74c6dd672fef874fee11276a1d1ce8f9570b5d8874. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPCO09434790.
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
海へ 〜現代日本フルート音楽の諸相
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d02ceb94819f8e976e3d07887c45efd351d2a0146784d7887fe27153d55eb73. 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/JPCO09231880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb20546d31ddaf351cbbb5ab843319307984744b32dd1d97d0a2b1ecabb6fac. 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/JPCO09231890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe308573d1da2e7c5e272380500f6dfe0a3804494b712f9fd1431e5c46dcf9dce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO09231980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95241a35cbb4168be74ddb7ae2c0df2798d66552c3d8340a69a20246486d28e6. 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/JPCO09232010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b81fe05376db0181cd19ba389dc955a03028ac25c6159b01b76a5dd68838024. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO09232030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778607fa3be68a263e4a231eb2467c62022ddd78f15cc87f3b31a5fc33a3aeb9. 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/JPCO09232050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09cb109f3efc4c73f1faecc0a9f07e9e60d207fa93fbd074e594b137b3c3a63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO09232100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789579c69d4d02518682d5c675217a0ec31705a8d596dfde119acae4ada40e2. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/JPCO09231900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e87a9b0c51ffb48227d552d2ed092d1313fdaedb4982ddb1d419ed4c3924de. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/JPCO09232060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1ef650fbbfb7b6d5fbd7b5aa0e53f0e0846ac2dde8a295c72122ee602fef64. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPCO09232070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1f71db0ca4baf254d528709982708022c2765928573c0959a3f54760a22e6e. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/JPCO09232080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd656ccea3875477cf48ef21709931b10b3ce69d7267a34a64e47e8b8ba620eeb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPCO09232120.
1982 武満徹世界初演曲集 (Live At 札幌市民会館ホール / 1982)
武満 徹：秋 -琵琶、尺八、オーケストラのための