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 0xe2790a318c43db036b460d30b413dbc0ecd4e0a213505e6f92bf7dc0b2cc6b4d. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e221a912-9dd1-4e09-9919-f17725152946.json and https://artists.proofprofile.net/proofs/artist/e221a912-9dd1-4e09-9919-f17725152946.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 0xe71c32c755785a8fe3719a9527c451d9ea5f7f4650e74a95c77166cb0e44945e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPX742000502.
愛すべきお客様に、ハートフルな今日と最高の笑顔を
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfe967608f524d93adcb03951969b67db7f00a94628dfa1d275f1a5824076f4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPX742000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71544f604f9b487929e89b792af61017cfa56f6bdd25707736f2a18df495c640. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPX742000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9b8ea8b39c4419e38d347658656921585667c3ba6318178d325671d7abba39. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPX742000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7361865fe621da1b4faa7e9967a22d1187a42a525c61e45d0bd4a4525b27fec1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPX742000506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47957376414c051201089fa986114daa2a63d432aa7cb877fb892b5718ba2c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPX742000507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f6c94eec91aebd6fc8326d75b8b10b48e9443b4d4e1c5d3ec67a93ddf0635b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPX742000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0205c7681d28787041a53e6b13c2a233c81f870654029af10da88520d2fad413. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPX742000509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbcafa7d18ea6f24365d244f9861bf60dd41fd05987f8b86e535daa135ce291. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPX742000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6886987fb1f966a677b37a783dab4e59f1a51947ce5bbf1bf372fac6702fee8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPX742000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365671d7ae9b4962fe17d56a77286d59fe942e6933de9b792433a5d1b9f68ed0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPX742000512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54471c002b9255ef7208d0abe9e6fe773fe6063701b4b4be6122909892515f4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPX742000513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713c3fc4c9214d07e97e6ff2ca58263041b108c815964037c68d24f17af78855. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPX742000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f634506b3a9cf2954ada5801eb6b414b81a9def61850f523477043ae3553a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPX742000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf410cf23b063d1c88774b0502fdf049fe365daf784a55de7d91fbc3200af64. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPX742000545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4e5a9563fc0f81b5b7ed3167bff2d0c95c892fff8df18d4fc0119d8f24bf4b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPX742000499.