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 0xa9846733a665410edf275fd0462d2a3c4423f32180a1cc9b9dd94e71a9c16281. 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/db44cf0c-d452-420e-8662-09ae2a634afc.json and https://artists.proofprofile.net/proofs/artist/db44cf0c-d452-420e-8662-09ae2a634afc.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 0x76c7db628affa1eeb79af3ca8f45ef733dd0af23beafd22d78e76f79d5f06026. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:15Z), 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/QZHNB2383149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dcb995ce7c57720b0d25c6dd12532794c64546c929591171d6daf5d36f57f4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:26Z), 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/QZES82352197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2234478ea7220895e69195fe96dac30ecdb83558ab61cb82ff52bc272eda0520. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:29Z), 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/QZNWZ2429619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a6b5a00ea64185bb3a657dffe1ac7caf39b5af1338e05db546d7b1366ac914. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTAW2497689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d65e5cc0cb2ac124dcd183b4d84dc9ad0df365e1c63f903b41bfc07aceafb4. 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/QZWFH2495452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc2dfce5d2b9a17368d75a8d7e6699fc71ee8a181f9faa94f2b094d621ec9ba. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZWFW2424480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaae7aa809ebc864581afdb8637f1593c9de55f4584f9413d133e95513fec2a. 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/QZFZ22509511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf309e9c9bf3fee46d71a91e782a9c5c7ecb5832e138a5d4bfb755d300d968f4f. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZHN52523440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38baea5dbf261cb6f344f8c4104e70e06092bd34b3ef769275775680182d30fd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6H2554726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c52324506990ee00f3fb47ca2de7cac5350faa996188e4c9fdeea1d5b1ad38. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBF2537854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5317cd1f220a50b66cbcf17ce75388ac44dcb7a0984acba17326fb8b43265486. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT3EX2599182.