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 0x24937d537bd4da5808624c9a91f590c22b1ccbdabfb2f835c45b48b774ba8d53. 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/014aafa1-5175-4528-89bb-febb27a23e8c.json and https://artists.proofprofile.net/proofs/artist/014aafa1-5175-4528-89bb-febb27a23e8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ももくろちゃんZ どうようコレクション
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 0x44aeb95fb03017ee350e7853e503c696dc46a601df25355ce0aa6799ebab2aa4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPKI02111197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4d5215db40d589ab2cb887738c6b3426ded6f0e5c98c7271596ec1f853e04. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:48Z), 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/JPKI02111202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076531bc2b7b0173fc5598b8cfd35883aa324015f9a30a42d0cc79356c6d24f. 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/JPKI01910701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fbdd5822a65e48ebec52533bf56661534250d47737fbdd3229947f7f1b0968. 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/JPKI02111205.
ぐーちょきぱーてぃー ～まるごとノリノリー!～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4030bfd7a6250a2182be3583a951bf997f43c5b685e3206af679bb46b288ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPKI01910566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076531bc2b7b0173fc5598b8cfd35883aa324015f9a30a42d0cc79356c6d24f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPKI01910701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6531c77d44fb376ac01005d133a9f51c32d3497f035d2efca16933957f0f493c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPKI01910588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee33db2fcee2fb1dc33be2be6310864a40f9eaacb6bfb8ccbd36e77251e1e701. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPKI01818401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b7ad890ea7f043630d2bcea6eb7503002585ebbca676bf3f2d272834539a3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPKI01818402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c17707de2831e31c422c72844545782b8a01ba1ec675d74d3af1f6a48867d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPKI01910562.
ぐーちょきぱーてぃー ～えがおでノリノリー!～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40793c8facb459a06b7722b47b4e8adb7ab6ea2489093c6b3728a2875e29631. 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/JPKI01815692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713659c6a8840758e106c78b5994296d80884c8b08f18e7747162a544bc2d26d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPKI01815696.
ぐーちょきぱーてぃー ～まいにちノリノリー!～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608bc81e86d31e557df509f6c35b31c89c46071a3e59ce40b70b5014ce475ffb. 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/JPKI01716468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffc8bb237f1a226eb7a2aa01d58f482b04db988ae4f4c52b4d9998efacb0bf9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPKI01716473.
ぐーちょきぱーてぃー ～みんなノリノリー!～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e787a24639aee3d9cbd8a43fb1fd6a0a6982c7012520332d36e4ac5b82195b. 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/JPKI01711866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686759ce45e3bce2e5c93d37b39b7837ecaef855a90c7ae012deeb7b1e0d6a19. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPKI01618070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed42c90b36e62a3e1c71f338f75d511eb56941cb77e96e1b7498f77e71187f3a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPKI02310540.