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 0xf871933ff0a193243a56b0116ff75c770e42142c9a4a9a8776fc73b1026dcce5. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81943926-d983-4969-b073-ec89337a3278.json and https://artists.proofprofile.net/proofs/artist/81943926-d983-4969-b073-ec89337a3278.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 0x80ab898ce6c625e5ae1b63f9cc117cd8dedc081d111d60504ac4b6aad1aed5c6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPV751901521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899c7b93e4ade2e4f738da600000389806de0a7d124511a30fc8b07990959939. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/JPV751901520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ab898ce6c625e5ae1b63f9cc117cd8dedc081d111d60504ac4b6aad1aed5c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPV751901521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf24c2dea6d88517ee458f341c972e80c58ed5b5025649d0196b3be48e73684. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPV752104919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd7ae3711616c41e3501dd8775a5a357053c7476756f3c5e8d23061fa227116. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPV752105165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d73e80e9e69dcc6eed17f9b8162d15e5e0ab744a5720b3fb3c0bba9ce2ce1c5. 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/JPV752105299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d878fbb65d76db7b282adc809b98b33d2a19e3cdd65e1d28a97c9146d5f1b. 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/JPV752205769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f7ffee1d507005ca9d691d3d30d9cdad2ec7c15fc030aadc37584fe3000cf. 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/JPV752205770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66b448e8ebfda44dced977bf85da0bb90c3f31580189cd3b46d00cc4b025ed. 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/JPV752205771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186735e146ddddb0867fc3800ee3c4230938c6b192e647a0a7bd7666a4c5d9f. 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/JPV752205772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d5b05461117e55baa85636f44c66e654bce71c23ea988020334c9a53069f6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/JPV752205773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf4eada0f566200918a7026d09cff0f6713b3f8c576b50d9d51c39078a99cc. 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/JPV752205774.
だれかの心臓になれたなら feat.榊原ゆい
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd586b1a0c4fa7bba38b2b615f8405ad222c0aabf08794e02d4bdfe54b2288731. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPV752206451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec9da05cbc07e4fd11cab418889227c241d7cb459af52e547320382edbaf11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPV752206548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e7ba75bd8fc4bc21568da3bcf0e7c704219506c14d4b671a41de66a0229871. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPV752307227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6b0562d2a63140f9718274fe5ba1233040d1d1d5c256609e53fde31d3edc4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JPV752307266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418d61b86348e06fddc277da5a4ae5333e37ab8a36ab54293754e9beaafd6bc. 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/JPV752207150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3aa2bb76942d3155fcc9033c7f637af4fff19d3caefaf1cb067876f594857b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPV752307605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1143d4bf80614ff2bb197ab916fc0a56ca7bda910a22e9f3a32a7c6290eacbc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPV752307639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd38c4064b36cf51e1b349f0c4eeee4654a4c48cf9c4d43fa8b67d1a5d71d89c. 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/JPV752307681.