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 0xecb06d7c1188aeee8ae352c36548a20ee9e7c676323f8132b78abe69e02a5c8e. 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/b19d2f52-1f09-4d35-848e-95c66dfe1671.json and https://artists.proofprofile.net/proofs/artist/b19d2f52-1f09-4d35-848e-95c66dfe1671.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Isshi Souden maimai Shinken (feat. YURiCa & Hanatan)
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 0x76f11477850718fbccec579b0c11dc7191d3316a208f77ee12763369d3dfcc87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPS2244050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4298b31d11eac884310fefd34a4acc3a7409bacffa3eac1c0ac25cd7f9ba91. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPW562003178.
Tasogare Relation CHUNITHM Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f062b7473fcd026bf985f7c5edbcdc0593a74d1fd0d5106986c065ed11cefb. 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/JPX301921410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091ddba5234ce9b3231c1829af4b124ddaaa76404dfe41ebce9d3f3f7485dbe2. 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/JPW562109588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70816aa0f6b2c6c7e4e913de0d29a238bff9d05dab5311daa0219995d775c82. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPW562109213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e7cf4fea0637b3c065b4b38048ae9bedb101ad563a59078d7b1614fed8f20f. 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/JPW562108231.
MAHOROBAGRAPHIE (feat. YURiCa/花たん/709sec.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f6e2ef96ac4ac5669ef1fd6bd844906c115a77994479325d40924280a301c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPW561808315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80d3df505a84d2a05cc260e8ed373203cdde581b7564d3191202cdee0fcd3bf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPW562109196.
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 0xca5976898bbcdfd8697f4777fef5f653f2003860773b7cc4895b3603b68ff185. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPW562107099.
優しい雨が頬に落ちたので feat. YURiCa/花たん (2021 Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9a97fae1d31fe5986b6d5be5a6f8f9d72271146b49019593736842b6f59ada. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPW562107103.
inverted RAINBOW feat. YURiCa/花たん - Z/CYTOKINE Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde956a7cea3f7c927298405bb7133b40e8ca984ff68c5c8164befa17ed05e72b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPW562107110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0212cbb866273930011d24647f086bcb7395e7d663e2b635d83086cece45b5f7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPW562107081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8998dba44b472ebbfc3ff05855ca1933f4c5b870120420d4ce9fb91e354e2282. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPW562107095.
君に至る病 feat. YURiCa/花たん - Edelritter Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf478568b4f8b80071348a467233ce195df9957b684730e6cf3a6dceec825c891. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPW562107098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeb70338cc1b009d028b93e5fa8041d20f35619c3e53fadd71817a91ed7e72e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPW562105524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6dbc0bba45ab26ee8552f313bf01b9bbdc973261325a1cfacc31367a6009b1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561808322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea98b980699e3a9498a12ee257fda21e2cf6f7c63449911a4c4a0f2e7f490ab0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPW561808178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94144ea9ecd993e961fa666dd39dc45c93243e98c193eb2404b4bc122bde0689. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561808083.