千葉県立幕張総合高等学校合唱団
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 0xfd9a669bc9f4fc69deab7f89b35a2cf9b8cf55a16d47c852ef09cc493c48455d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5515508d-4494-41cb-8a8f-e3a5ef2b177f.json and https://artists.proofprofile.net/proofs/artist/5515508d-4494-41cb-8a8f-e3a5ef2b177f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4267155cac85211b14645826e1e3189ab53a86e25ff8007a3251ece0915ffd7c. 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/JPCO01604270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded0ea65b03c121d527ca61364572f59f2c0212fef7c2d525533b7d1e9dab481. 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/JPCO01604280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a836e5173029e1a1a980f706a4db3271fb9f94bccfc9c6f05691d00078c7f2. 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/JPCO01604330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cf87c8bba8d499747cc3ea4e0217739d2267e1b570f8a2ec97ad627a00db2e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPCO01604340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1f965b8cf4d2e489c9431999b374bf23723bf0df0db57fb82f2709696e64f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/JPCO01701630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf476e8a1fe5366325f384c22e81b4f9c7ef23b5651e790ebd0f34bcac4d5fb0e. 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/JPCO01300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e27d1ae705cf95aa0a6bb01cccfd7352806d39b185e1ccc17aeb583ae483856. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPCO01300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffe87e9d41a0dc930ee3fdbe9e13f30b4db95d8052fd305ce3a52cc8905a85c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPCO01300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdddb8186e6ac33e4c89c012465ff2c5a2ca4218fd4ccf87a9f03171afafb564. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:41Z), 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/JPCO01405030.