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 0xc5424887f5ba0669fb10c85e32a8a1309ddb44ab34187edfeb388ee47b6a92b3. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df310a20-8394-4a36-bc70-e0f34edc9cd2.json and https://artists.proofprofile.net/proofs/artist/df310a20-8394-4a36-bc70-e0f34edc9cd2.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 0x7dd33bb88d20866bb2f0b37fbff156e686466b59fbc41d1f054c3328608a8cf0. 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/JPW462537516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a20e869e5f4f3f81154ac58b7894b2b96925c3810c85bbc4cb2f40bfc4e077. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JPW462537517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb07dedc67470e99e48ddf47b06b33b692887ce56b7f889472fcddcf09d39346. 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/JPW462537518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a67500bf230b82bd8123ead2ab5fba3faf63d5a859069d8c4f25e531b3d656. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPW462537519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e45995cd9e32a0042bcf327c8ffbbb3aba098c67168f62e40d719c67e22540. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPW462537520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9aacd784d404cc59f19c4c4f21990fe91dcd2c0958c2b8f0f22fe6491271f0. 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/JPW462537521.
さよならに愛なんて少しも無くていい
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0f98bef79f1dfa52531ba7875c92fa71f45d2ad398b8cdcdc047878ddf5090. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPW462537522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c4243f5d8fc1dafa810caade3566c3aacda6e355ea504f443cb7201d8b376. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPW462537523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b296ed35ee9115e68eaffa4c8a4c5fab2ec7787a70aae571b7d5d77034649. 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/JPW462537524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd395f395064440c843617ad72f86de10832a3d4ff9c68661db0b286ccf283ce. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/JPW462537525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efccac319b4d0585702b44d94f8d2c08f3748494007ac9468b932aa8e1c3464. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JPW462537526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f5df2a2da18e3d357df45115ba60156ac09d415bb368270030925bcb250b0a. 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/JPW462537527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936972450e6b624c457667a736cc478ec5a418710d7d26719ba906f771ef34a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPW462537528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc5f7ba7d26525218361d9460d78bd77f46c68fc492b8655da19133bba82907. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPW462537529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e998819876705e5da40ff2698f477a0ab6ee8d03b43ad2eb7922ce7dd1b90bd. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/JPW462537530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83b2c16aa9ab091b188290690c757c3639ba8665e51357da6774d5a008117b5. 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/JPW462537531.