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 0x9864dc9d9036a8a00fd369f45e9b75cf0db3d84b41359a5fa1b514df0cdf7289. 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/f4306555-8ba3-47a3-aeff-f62ac6e5414b.json and https://artists.proofprofile.net/proofs/artist/f4306555-8ba3-47a3-aeff-f62ac6e5414b.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 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 0xf90b9aa330efd9490d4aae43d87df2b92db52d6812dda4c5c6b58a25a242805a. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/JPE871802845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad665847efc49b1b62518f645ed9d9082759d3ade35211fa6b22a60f0545e23e. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/JPE871802846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b959b56687c5c07a27e6c1568e427184cae9cf5ead806a831acae6b6611bfe. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPE871802848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61b66889d2644178f8f9cf356bfc80b931848725ce9d428c8a383870a0349f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPH941001051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6dc63ffaae390e6d3b85a30a4a24d4dcc54ea75e083ade29d3111872c3f803. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/JPH941001052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec6f55ab6d58770a520fa1c3ab7ba6bf2a76932d64bad1c90ecd3e151eafcc. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/JPH941001053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f8ef3147243fba56879226a9db4dee4724f82af0bec78376f3f434564e524. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPT201900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f48ac3d2fb4505240b0fee59a8052eb6e22f188819c604312ba21584f8556f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPT201900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6d6cc135631d41587ac0d4f9d99d3ec2566881fb971a9246f3d1ce20b5baf9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPT201900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ac054fa1e6d49a44c561e488da1baa498ee28927d254b8489b767941cd1269. 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/JPB602165078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ba714d49c9aca04236112e7111cddf3f9fd1418f53ad4af9f75ae524c3840. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92N2255784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b5a89612a5f18a83655647157894970c4f92c2b5aead2314f65adc32366a9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPE872204575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144966a211d623299c78cfe850180c20a659a0a3082f7155c84eae8f0952efce. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/JPE872204583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f51488d1a71b1c164ae3be164e3173a1d9aa53c40a4556383f3b3c9ff4b3ae5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPE872204572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc343036cd7556f07cc7c33d04dbc70c578137e5bd921f431d7b207a4dcdb804b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JP92N2499196.
幸せとはそれくらいのさりげなさで