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 0x626ce6ecf1fd92b83b6984d49aebe013ccce76087a47753d13e8d5c299fe6eb2. 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/a53b100e-7f5c-4182-9f3b-683d754e720b.json and https://artists.proofprofile.net/proofs/artist/a53b100e-7f5c-4182-9f3b-683d754e720b.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 0x3516765beda6259940735ee8a34661cbe241fcdb68610ec26c37f006120e217c. 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/QMEU32110996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbe7a82acab70164220a0590ac677a08b39b290eb055747289e4b195768cd9d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ITOP82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7588e39f2fd4166685a77df1ad6c5b3ceab0ac9aa2b5935f9ab2cc154685281. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DGA092367118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e61bc6d2e92a53c19a929fb103502e9f92a22a50d4184f293c68c15804b9c7d. 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/DGA072462767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574d4fde791ce2d9a70229eda0994aa573dcdfaf91aabc12f6ec2b39d3c2ddb7. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ATV282000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a4d7380dcb45d373040d6d81aa23e2cc920a090e002b92af4885acb6cc47f7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN72579599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db531435c2cb95080154fb0bb2ea5a9c3b8c0ea8596d961ee2f36be922771c1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZPEW2588694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047d4df58cebdde8c54c1fb07881a7365a21967fa2ae65649692d18df693767. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZHN72576649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0897c0d3a5e6e736ecd597a3dadbe46d3fa5efaebf48c348f7dc45c2e2f3b205. 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/QZK6N2586290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d1aaf3932663f1e5152dd410fcaf3aae84d937f6bcb3c76c05938e2afe0ee. 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/QZK6L2525185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe049eb5469beeda8fcba89cbbce6bbd4bc5fa03579400c7c2aee8775875b0e1. 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/QZNWW2517044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871c56bd7f047c56d85c29a3deac552597bb25df3790a54308f6694d7aa84fc1. 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/QZTAW2560727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff8b8748ef7e7027167a235ab26b7658a9ef8b7274e122cf994291f3f896244. 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/QZTB22512705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89863c70340387571ca33571942487f51f18cbee18bccd844c22a5141387b343. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZSTP2500472.
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