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 0x6e695847b7873c86d3bb5d58995dd14f8e99b92c84d90702490cd23bb9250cd9. 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/8445871b-dd45-46c3-a385-2a9df8ede101.json and https://artists.proofprofile.net/proofs/artist/8445871b-dd45-46c3-a385-2a9df8ede101.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 0xcfc962b570491089ea64d22a6f35452411c54e5cff4be818a84b34ed510e3753. 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/JPN751710011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb33369d872f8793a080bd919ed4e56be2b87e3aac8aff19859051c0fc70b8d. 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/JPN751710012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c54101cc6adff4c645fb46bf4776693671d4f6f1960275f158f5885b9aeebf4. 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/JPN751710013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db03b03fd3715f6983be93ab1f637f938bc64ace5c2978899ef5051e2ee74e0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPN751710015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7574cec3b692eb47afbe116c608e19a80d21a64e9c12bda1867e46896998e82. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/JPN751710017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc3de3ad74f5add534535598501d2936d77d035f02e10f38116ed5bdcc5b58f. 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/JPN751710018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d253222b4d6c4b4fcbbb4e7e2d3d1fd8b81a67bdc552a0b6061f403e353461f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPN751710019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7984c3d36cbc1d890877d1c2b0a6cd1f967a6cff75d9a01fe790e992637a8ae9. 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/JPN751710022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80db5c8d076d3f10ada41cb8e20239e6c2d5272325a3617c9c1a5539884ccdb. 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/JPN751710023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c3d86ccc7e22af4dac9df5c8ff6fabcc09b977962859497f536f0962d263ad. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPN751710024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9eb11eb287c684730bb46aaad615a0226a8c746b26819d6191be16ed54187. 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/JPN751710025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372fdd4cb9683dac338d186a741762f0e0a2e5afdd57b05052eb7bf9375642c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPN751710026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39df09f5e95a0f9d0962fbf655c575d95367f293c9fd24c122ad0ec53046d1a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPN751710029.
ジブリmeetsオルゴール〜やさしさにつつまれたなら〜
いきものがかり ～ALL TIME BEST～オルゴールコレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f362bb600804a9d4982219b39681539a1317e00c50e84cbc44e1d7a2a3c0c1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPN751910040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c51bae76c232f01c3564fc108e43ee50c6b1218a68471c3cfd3b009a8702be. 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/JPN751910041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5824d00410e643fcc19704a7fe365240df280cec39e8796c84c511b5296222. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/JPN751910043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d3a451f322a247e38c0d72639ff3f850b95a0ab20535224d19a84842d0d8ea. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/JPN751910044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9890bcbdf6065a684817a0d91b1f0c7d1fb77e8bd9db348a6709987bec5ed644. 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/JPN751910046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2311f2f90aafcad68a5524b75895ea7733caf3b090d04732f3eb4bc498f85f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/JPN751910053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2f619c6442d2b26129f6c18815930a7b17584c31b47eac90b1c10e872dfa21. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPN751910057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b1127d5e40c3ad7487b3be3f78478a9490a7910f4fd90567581bb2509ea32. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPN751910059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d2fc9b7360b8128691d5eddd668e67508cdaa5b0bfbad442068a464d98bc74. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/JPN751910062.