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 0xfbb1a56d8d4b4d6232eb13e89e0f9cb7c1c1fb06d15dd71482272c66aa14c5b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/504501fb-020a-489d-95c5-343b4b52edbd.json and https://artists.proofprofile.net/proofs/artist/504501fb-020a-489d-95c5-343b4b52edbd.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 0xef8708374b625e8faf9d01a8ea4cdd0029fe07f077f76d1bf824fd1d87347f3b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:28Z), 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/QZHNA2494434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9726f478ebcb5f53fc640a2581b32fb06b440d7d2156569b97692984fca3bef2. 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/QZHNA2289703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6fe2ba710c57e59a05bb981a0d0f25681c89ef0e9ec26d87bb248b1baa5e7a. 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/QZHNA2289699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa9cce2c214f37d76e2a2256dbae08161e34115b421b2b345f36b4e385cc95d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNA2289702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb5d31c5d2e7976faa54befee7cba4c6826e49e047a90f313591beef8b884da. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:25Z), 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/GBSXS2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e050261996e8fa8b6a133939efc22af620ca32fbba556a4aeeca1501b8d71. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBSXS2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65446c5fdf9f10418290130aee56b0569b10239b321453c61dce319b0cc3cf75. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAZ2205046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a91b516ca370d5912f47ca55afd8cc9fd6966aeb1eebc02955e273a3a2145f. 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/QZK6L2425448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348e1397c8776778f76d55e73b4325a206ad78eb6e8272afe134d3a0f7b27856. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP52402444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b377d4a0681bc298a138074950d0ca17db2d0949b9ed0b852def861a889bb40. 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/QZTAT2475679.