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 0x10befbad8f225d9f42232552f74fe0e997b79d35b4d6aa53f2850668ebb499b9. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/636d5a85-6885-4d3f-8de8-4af74bffec70.json and https://artists.proofprofile.net/proofs/artist/636d5a85-6885-4d3f-8de8-4af74bffec70.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 0x0738db74ada01f5bc733ff0653e69fd08ec7ca0869717d50730fd03754d2f0bc. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/NLC820000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322b303e3063bd60f2f5429ea6f8ea66c7d8f3af1e5c2dd99341b92969a85ccc. 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/NLC820000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a000138af1e09038bf434c2c81ed5c69afc96a8d9b531d2025aeaf32c92056. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLC820000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5eda66b10325b56bde1fa5bb6892c73dc8da7da00bf991d81227d45452f8f6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NLC820000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a9bb9fa2040b758b5909e1194d699155adefa74b745dbed9cbf9894daf9e54. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NLC820000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbba375497e0f0f808d1e126bdfad1e2b35bc37fa11956a87fe2fb353dfb633. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:06Z), 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/NLC820000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb798cc994252e71ac647cc804bde2f94ac426b4618133d6b3c2b97085faed654. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/NLC820000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3be47f7b9d75d320d77f000e006a822cc487bfb930c6128d9d11c2e28dbdf62. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:03Z), 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/NLC820000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe736497ec13f2dec210e78b0bccd20d19c4df3015ace002ff3f32ca5828f1636. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/NLC820000059.