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 0x521fe4fbd033f5ed7638bebac297c77901b3cf303a8fcb4f3e5cf536a59134e3. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee373b5a-80e9-4bf7-8105-980e5e6be496.json and https://artists.proofprofile.net/proofs/artist/ee373b5a-80e9-4bf7-8105-980e5e6be496.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 0xc117c3124977b4bf54525e47452003c9dbe1cc9e2f0e145fa10d4cc210776bc6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEN2073802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706aad3f598ef9a87799a51a9fc6d4cba45106f6b935f1744fc19ff3c9867585. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWR2003707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281bef9727da89ab2e3e45dc19845b39b3799ffe8fa9e0d4026577d0fa7d7b41. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:51Z), 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/QZMEP2144045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac3f4ce4e94f240ed1d7a69353114c50585b96efada649203ea81f83f328137. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTAS2187867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c4d0c7f3ddca119aef8d95b28a84058c76b782dbda0960f756ea04cbedcb01. 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/QZNWW2349203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f2cd2fad86c064be030f81c9463954ae32278dbb7add338d35032cb8852260. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNA2464480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd448dd18659f6f8c296228698c8bc58772f03094fb5d898f435e23b193fbe4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:20:37Z), 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/QZHNC2421328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d0d9ab863c98e7136aea174e3fa103eb748f6c74b688bc9b2554188c628fdb. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:01:10Z), 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/QZTB42406961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839c53897d2f0ee4e67877de6c0f21e5f06a95a6db3fe831f9932ae42839a6b8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ7X2437784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490e810af35630c77990c5547b4b7293ec81dcf6c517d48441ec12a2792cd56. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:37:50Z), 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/USLD91742227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f4f355181c736ee456977a95dcee0fb745afa1b3814b9e5d9468a5667427f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZL382278688.