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 0xad38e310124310f3e956a812446fa94866fce921e5e647b732ec0226f49e5db7. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37ddc9fd-a7d5-4081-aa4f-b759a677a889.json and https://artists.proofprofile.net/proofs/artist/37ddc9fd-a7d5-4081-aa4f-b759a677a889.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 0x18fbfc152932bb463b7ab421bd51ffa5dd20c55600b7b1a0b58d9f898f819296. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:28Z), 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/TCJPP2116216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43daf00e9b925a1070ef4a92f6cf5650bf33270d11e1512bce1e0195281e284. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:58:18Z), 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/TCJPP2185249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3618e3ed4404e4f7a11bc3d823de4ec2dbfb931ed055f88599d5f1ba29c29bc7. 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/TCJPP2196254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ec60e4cbf174bbf6935a41c8f5272579ff7a431f9ad9e40b330e29a79fe56. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPR2271327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24fb360579202d4bac72dd30caa8f811377cc8be177f0a157573339fcec1e4c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:45Z), 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/TCJPV2355634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a23c8f5269f77f6641de00cc3a933b6ea13088721f66709a58f5d3f0022c68. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCJPW2399913.
瑠璃色センチメンタル (feat. ダイチ大佐)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb09c1614d0a002eb1251fc321a38d776970a00521aa2780618b89d1627868. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPY2305074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a66240d8b7bd53565bb94117206ab8b6141feaeeecd326aec2f04249d09ff78. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCJPA2409043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8207c5e49eefdd901dcb081696763a8919b9721d0f72da02c811fd9c42aeb5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPB2469563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2191d4fad5611b2cec59698c4b3fe01be6113689c6f33c8238a14c91f67b8e1. 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/JPT552300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2191d4fad5611b2cec59698c4b3fe01be6113689c6f33c8238a14c91f67b8e1. 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/JPT552300240.