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 0x90ca1fd2fc99cdafc41c4f5860483d0873428ca95c6e6da0efd99ffb16919f40. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8dbd035-149d-4393-abdc-03f0baf6612f.json and https://artists.proofprofile.net/proofs/artist/f8dbd035-149d-4393-abdc-03f0baf6612f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0076b3ae098d4e199abfeecf9afed365487dd5302c80ef59d2d90faa1144974e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USHM90411307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d0384129cbe090cbe6bbdb3ec7c2a4ddfe1951abba0b98eaedab32f967682. 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/USHM90411308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024bd67f9c2f4af1b5b280f6798fd8b2fc0a02107cbfb0aa4d7f2ee97f134297. 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/USHM90411309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc01b714222a4ed584bc64da3f419e410944eb5ce8eadd5a56827324b27132d6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM90411310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1829dd80caabe9b304434f8013110a18ae41c07637cf904da5a6b81379440108. 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/USHM90411311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d332c8c966d9bf7baa69a55a5bc0fb7c9e0512b193e005c24974fe2a6e8c8e2. 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/USHM90411312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d34c72f9694378fe0c0162e3f4d09cb0c804326960e83d7ffe975388edf264. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:43Z), 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/USHM90411313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad171f61a9999a0b4f62d7a136d7f6f964af7dd9885cc446e27a271235d970aa. 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/USHM90411314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c148bd5dc206ff4f64a38a29d0bdeb19b7e3cc98d6bedeb2c4aa9ed19e9a5d. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:20Z), 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/USHM90411315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16079ee10b6d45b6ca5ef23549bf1d3adc1a845a643b176bb652ed0994555f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USHM90411316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe733ab220b4de059d52d9d0d331ac74a4790e3a6836a4d3b5fc6a9ee3d86a73c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM90411317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a20d28eafe22ac6b2e0cb9c26156221335d5012b5779596edf2da5bcac7f312. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USHM90411318.