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 0x4156e1a59bd1c5cc2272687e38b8874f04c0bc5f643896343b03918dec6ec627. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d51c035d-ea19-4db2-84e6-d4dc15353801.json and https://artists.proofprofile.net/proofs/artist/d51c035d-ea19-4db2-84e6-d4dc15353801.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 0x3cc7e9ce4736e528a61addf53ba4f023388853d9364d3e418cdfcfda03d9250f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NLUM71800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccda54741813fd162d16e4ede27ffcf9cdce0df3a9085b60dd0b03f9f7e847ac. 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/NLUM71800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b36d5c8145b27a703121052f52fed4a7124fbb6822bdd549fd988b8b30fe5d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLUM71900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba07678ed55380399de7a1023b2b38f18f90548af130fe8b6cab0cf1e5f060b4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NLUM71800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f53060f2545b257b6acfd6ba33200f683c3b9d6afd18aeadf787a33972daee. 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/NLUM71800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a55878edb9c4d7411add197ae8282c1836a28bde910a066c0446f7c3da239b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLUM71800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea128a2cbe070a3c18bc5fad20306fb2452f07f0dc73c6548194aca9a2e2541. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NLUM71800161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ad90a2e395354ab0f6666357d0c7afd75e5f7b973b9d5f24989db9cbb3f965. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLUM71800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca50965ca10f207a5ed06e15a214dd1f07813de5eb3abb84818ca5c14b62b33. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:07:30Z), 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/NLUM71800165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97922b86bc364ea6a683f2494e29625802fadd575a460b4006e89aca098b45dc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:23:22Z), 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/NLUM72001151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720328d4ad0e11ac4f81e4909736a14270eaff2651115160c943a9a196c3dd1d. 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/NLUM72200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93cc5a5b9d958311b1a87c032355caf3e3cb0b0224ae87a2843506101ea8587. 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/NLUM72100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee827ebff6851c118b362b6a3c8bfbe473d20d8d136242852750bb9a248f0a2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLUM72200522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639352c83e1a0ebd105e512696702610aa58141a647f8ffd9697c91d0a80293. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:24Z), 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/NLUM72001029.