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 0xe3a3c378b65d14a757524784034e311a8781c2bbaa4a11ee7d5c9efd7ed05dbc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3a2b820-1ff1-4d26-bc8a-2de231bfbc5f.json and https://artists.proofprofile.net/proofs/artist/a3a2b820-1ff1-4d26-bc8a-2de231bfbc5f.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 0xb44973ad599ce2c0ee863faf27d03f1b4b8af9bab31db8804c4e68dc3baa7cf0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:25Z), 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/FRX202047837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bacba713c5dc9647b100d20a43ce3a3289ce56b36d8ff68ebb82880a24c3d07. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:14Z), 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/FRX202047840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b4901e9890c6d476429c9227552fe96099dff4463d027a741026bd75d6f5ec. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:17Z), 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/FRX202047847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5c54e69a36ada5220d0b3b06e2648f6df6c754634cd2d11ec238b6afb8f8e1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA052272850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4991da99e1d657ae5f41d520e1303e5e0615baeffbe07cf0fd3926d36288ab8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DGA052272852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008787a88d31adf7441f0bcbe4428a43d3e39f1d5b500dc66de0492ff5023631. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR10S2499725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26fb1744ee137562a648dae588075d9b82c4d0cb4c07b3f099218e6ac37fa41. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:48Z), 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/FR10S2499730.