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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c73b0f4c5f803ec30f6976b10776fcff196e1a303fca4335076d3ce59320620. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0e2cd7b-7c13-457c-8f08-24717080c146.json and https://artists.proofprofile.net/proofs/artist/f0e2cd7b-7c13-457c-8f08-24717080c146.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
“えがおのおくりもの” ～Chihaya Yoshitake Precure Song Best～
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e1bf59fec9246769a4183bbd4f8f6a0953324881779cfe853fca8e4c6ccb4a. 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/JPD602400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e9e6b58f5a91656813acfe15a081666980123669be289aa47eb994ecc48d38. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPD602400025.
Try Try Try ～Remix for Chihaya Yoshitake Ver.～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040b2cd27a83b8be5026dbc152d1742205b913d363cb9368b138188623946b7. 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/JPD602301457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b5e1b92bb61292bb9d4f892398346754745fafbf9f2b9e93b677af9654c7d. 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/JPD601900207.
Daybreak song ～Original Remix for Chihaya Yoshitake～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a53defb47d00145ae3d39ce882c06a146fb223c2ffb09f87b16f07dd605a5. 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/JPD602400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bcd165d93bc9871aff469bc15cdff3ec13dd899a6b32942c3d9b8c9b7ec8ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPD602200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bed356e9771df85e096e8f181b57e7bbcd804617ff2a8f1b3349d45e670715. 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/JPD602301518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a09100a2c9b570cda3112c18c7f3d9a1dfae6a897f329f1dffa2f4400277d93. 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/JPD602301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c883082b85e43ce02f89e57628f5aff6b8b76faa3c6d07abdd2a6d973637488. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPD602301909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c3bfcd7b544e2cd64029cb8cbb37c108bf8bd9bdd2a4e2b5a0c6d42cec2e33. 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/JPD602301905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55fb4c47b56ef3963cc377aa066b0e000e299a5292679bf6242451c97563352. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPD602200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f5697cf5d0ff2bb17fa92dbc0dfbaf5908cda5d2d4365e7c010a58599b4310. 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/JPD602100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f31256834061f2dc8c952024587ae8a93c6fa4c93fc3ce8b5ae68641778f41c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPD602400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77317a5f317cca285e03a0fab5ef42b9383c4060152687e9c9a160c785519b2. 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/JPD601900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2aaad7ab925933734e68d028139a035d3b2a38463a2168525d37a83c11e2d3. 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/JPD601900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf9e36bec0acc5d6bcd647b538153d5e75ef2b9e06ead370b7d79b12eae092. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:06:47Z), 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/JPD602400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b11fbad9df276e9fa53c5bbe97d0a137901f7f0e3916dc42ebf2749badebb9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPD602400646.
CLAP！～勇気を鳴らせ～ Remix for Chihaya Yoshitake
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4505ff5f71a9d4f460797279af70b992d1770f9c15fdaefec8fa7939301f25c9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JPD602100228.
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