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 0xae7b9be1d0ea6e2fa098ae6088fa583c5693a7e09f7a13d9f78c4e1bfc1474ba. 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/5031c60e-94c1-4886-86d3-88d2a2cb14e8.json and https://artists.proofprofile.net/proofs/artist/5031c60e-94c1-4886-86d3-88d2a2cb14e8.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 0xa923ace6a931cb28ada649d2f0d516edfaa8c5869a6541553c1105c2d976618b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BXI2Z2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f7c06b5152ee885916ecb84e869ae4cd31591f2d4e2ead62e63ec7e62ade74. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:35:32Z), 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/BXI2Z2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b2e4139a5258e993f995e17916a910228844ce000180aeec941d87f12467c7. 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/BXI2Z2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0013f056821df5e2089842ceed4eafd6a7fa65fe9e9cb507fb6ab6312bba1967. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BXI2Z2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304b262cf9edcb359c5e953a5039e5e479bd548668be4329347976f8b8a709c3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXI2Z2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98647a551222632adf0abef9e0bf5b077badf6bebd8f81a747640c0a26a0d95. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXI2Z2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c5c6032dd9b336b2faec9b959f856100c59a4a766596f7572b9b382a1eb342. 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/BXI2Z2400005.