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 0x1e9d98cf85483b80fa3ee938290f293f23d6368db6643e271592af682872113c. 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/e06f55a5-fbcc-407e-8774-ccb8464919bb.json and https://artists.proofprofile.net/proofs/artist/e06f55a5-fbcc-407e-8774-ccb8464919bb.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 0xfc1e6e96206345b89eab161c44d2d5182854a097a67c06069422523882c75873. 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/GBKQU2193607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b82af0e1aaa8723d081a1767d0b2c4049fc81f1ca237d5034f558fcd1fe25aa. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GBKQU2284687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9966085ea0af7d4afd3fa279c4416f155d470173c3def811a2a8dd5cc0a668b2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBKQU2403341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e716d0704c261b5e070c2c34fdab22a29d46a735926b22af68cc286a03c5ad4. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBKQU2403342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e3b779cf0f37ab4077ce2312fcafa2a0e79193358e0ee2f9af5dea6c61a4e0. 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/GBKQU2403343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a8770e91dc6f640152ce6bcd03a10b6b90a33d35f5e71b1557f9e979c9db43. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2472752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ea3ca467f686bd10b5a18814e94fc9029c3f6033f81e29706e9e69c48a3b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2472753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772538618943004dbc27e662d87464d668992f47031e51eee3da33170a7b07df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2472754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7dd57fee61e4ca66bb3672fb585d768436d47ecd757ee9156c734be841f4e9. 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/GBKQU2472755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195bccb9b566826c18b0c60406581908cff713e7d214aefb17782a372270f925. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:56:42Z), 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/QMBZ92409470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff68f515785923463497a3583c33866312ced6a302070e0b6c952ee2b5e75d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6P42515982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86bceb25bdeac01e3d637ca8e471aca21a36e63e80128f6f92f3fde7743489b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6P42515990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37c373992600b8be3b13489b42b5dd2e8407568a063d092ac75490df4fdbc2a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBKQU2587612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27541e5f3de1d00bf4f3b64d41bfa65d1c04f4d731be107ca6147c831c656f5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2587613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e6c5f0c7ffaf207ebe17b78199e988bea2d096fb4b2150003dddc8e62725d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2472762.