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 0x63ce07426e856532e246015a163522da52bd2915d52e7e83e766b13a686cac8c. 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/83b7be62-c9e8-41cd-b38a-6581c1ba8995.json and https://artists.proofprofile.net/proofs/artist/83b7be62-c9e8-41cd-b38a-6581c1ba8995.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 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 0xb67750a8cb08e7d04716188a8ce561e05b506054d97b0c3484094ea84c2719a3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/JPE561011768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e993bafbbe0cb33a946ba5e47d346c64cd6eeffb70e70e17726925e3898faa2. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/JPE561114758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781bbade17a3834271119a9385d8c61001478e84c44f91ff57841f47265725df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPE561400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708222ba2743a868af1735979503f9473b80abe44f134768f800ef811e3e1e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPE561401825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3fcbe6830d3906044d19f2c1d1881e4fb6819bc022c424ce3ed6ce97fb6be0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPE561500627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c1126b02d8be65626c9d3ed7bfab046b8d7d5e92bd95966b3d116a7c80ac10. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/JPE561703280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826f2eb25b80ffc1abf5036640cb945633168ebb25b915040e1c70bc65be3991. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/JPE561703290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83801fa15e2f3ef1c00f1edd26e431bb421146789464e698995cdf6e67653e8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPE561703296.
Ano hino bokuni hanatabawo (feat. AYAKA UMEDA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b0b570d15db292096f9ec95bd150961baac4190e724af28118ad038df15322. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPE562107290.
星空のメロディー (feat. 初音ミク&鏡音リン&鏡音レン&MEIKO&KAITO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674ecac4b54233fb34fded0620b19e3cc9f3415db93c25fe5774de46be1e81c8. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/JP92Q2301288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1cf72ede2d1b49aa8f7d223a0c5781ec5b19f170808e118689850dd6fe535f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/JPA651804417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbea5d1145af73acd3715271b15b11f9e2393ea618c1bc742f20164b03a59e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPQ952100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d6b512ce5cb761f5ab986531b1d2d2237ac5fcd063f0c35a893affe5a8c52b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/JPJ931800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca750253e53e417f3267aedfbc3dc45339302f85a50d203620e74d7808af0cdf. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPJ931800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6c0b9fa8e852e093fd05e2370dc81c031cfeedb6a3f0792b5ce7881d99fbb. 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/JPA652400011.