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 0x1f583134a4ceaa34416ccada6e97dc052e0d935b67116a51ee295786dd9d660c. 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/dddf0672-6357-4dfd-bcfb-c1ca795f35be.json and https://artists.proofprofile.net/proofs/artist/dddf0672-6357-4dfd-bcfb-c1ca795f35be.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 0x1235e3b06b46cb2e1f951a5c011867118d8caae762daad7db4670f9110d2cef0. 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/FRX201814481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c1f5273a4c51d3d8c6916d37ed76a2df51de4e3407b7965b0523764fef2ed. 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/FRX201814483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c3b16ba62be1a046ace925249981008834141c2b0b95488801dfa18990302. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:45Z), 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/FRX201814487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdaf71bd94e5ff5f6e2a04b2f88eb3f6e26984ce427c539990182d5db8c1d87. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FR59R2003822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c280028b47c0167b2027f8573ffaaedaa742f8fddabff8b483a6e35809240. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR59R2003825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c7ff2a769d0a13eaacd040390c214aa108a3121606c012d61f54966d93727a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872473587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238649d564ba528fc404103663e6003bae4686f73098e59005842b30788e741. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRX872473588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db3632fea6d65605fcc661abaa5625ca9cc0a8fd6538bbae5c3a686c9fedbf4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:02Z), 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/FRX872473589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82c697ac4ad2514167a715d156627ce6b51e932fae07a9ef862ab36f18a4a0d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:16Z), 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/FRX872473590.