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 0x06d17683afb4d0a7c71b588da45e6ff31ae25c69364f24a4b544dc29ce17e71f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bed92a8-6af6-43c0-a300-3b3f963889cc.json and https://artists.proofprofile.net/proofs/artist/9bed92a8-6af6-43c0-a300-3b3f963889cc.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 0x834559f5b8bf856801c6c5b908fa4011825f81b0dedb9f567e9d3676994372ef. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FI3SY0800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcac9d3db9cb554bc71c55e3d1f9efe413916b20f678aeacd045130c4a4cf837. 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/FI3SY0800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8642bdab06225d2a8e756bff24dabd21194b066b0c88a32e5b3c5aa8a131e3a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:36:38Z), 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/FI3SY1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce243516a5697af92b59093c21099314cb72bb83c3bacbbdb0f2865209ee835. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:03Z), 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/FI3SY1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd5035ce1bc668480529a75fdc124f8831f9e8f6b645f04326d50362c5e693. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:35:06Z), 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/FI3SY1400002.