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 0x515e128bb707350b9388f8f8d15c7e9d6d86e4df7c7bf0a1b3b11d883eca71b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f8f45e9-a9d6-412f-8f5a-7d0494e92794.json and https://artists.proofprofile.net/proofs/artist/2f8f45e9-a9d6-412f-8f5a-7d0494e92794.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 0x1dd558619226b981efeeb2d22145eccac73cc457760028c7fcbd3a57db716fbf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR10S1843496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb83811662548177d5967633c25cfaf23301608352a303d573a172cddf33ef0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/INJ221901906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e1c474f01adf9dd699b78ba8dcdbd589a4e1c58fc746f9cede74f4261bde39. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/INJ221905342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f89260ba031e1ba025fca72e590f11ed1451b65c43d468d19ab4e2a2c3d96b7. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAGG2236052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f1ad7acc246b32f972c6d8c5c196d28275de9293b7e9185ecb5976fd4bca42. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ72439942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa8552e4768991631591356015c313228b5d4989686cb089cf35d6c311ced18. 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/QM6MZ2412670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd1e71a8d201b57608ee70b22d745382cd16a7bbfd6a82aa300ad560d11dfa. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:03Z), 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/DGA0R2451033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971a8dedce13277c68d8b57edd7fedb308da73b5a9ab02241c16b8666c9f877e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QT65Z2595537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba3fb04d38ffa71ebac210d640a4c155d65661d1bed5c557f1d0eae0daef9ff. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AUBEC2431727.