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 0x5f76c0bee4b103a2942260e50639e26474c2bc4256008f2cfb90f266c4404143. 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/e8160634-8445-40d5-b20f-934fd7b049c1.json and https://artists.proofprofile.net/proofs/artist/e8160634-8445-40d5-b20f-934fd7b049c1.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 0x7ac7b1b46da0f7a0b0f5abaeae68fab4d60871031c206c0165f59dcde1ac28af. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN82126266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b5d09e81cec32daaac73bf594aa998ff755d7756d168f789637ba1f06ca542. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:28Z), 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/QZK6Q2313603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935b0090a942cb3b3b1694f35d9134e9844388cb9ddad99794b5c111112996a1. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZWFF2357329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9725a641d781f546b09603857f3c16642aa5f5306d7ce71328ae13aaccbb19c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFF2357331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31934873f41e4bb975bab98bae5ecc0f95131207edc4cca0cf5dd735e40b0cc0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFF2357333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1692f4c367ec826ffccfc4f2a037f26f2d5a4714761c3e5bb58f75365aec833. 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/QZDA62426174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3057824c2e5fa59d43e11e3b98a967aaeaf34eaac3831ac2fdff4a1657c2c04. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES72487248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb225e1833d7763a240886f07845b636f315c4b0f7d48351844b0f25a353026b. 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/QZDA62487289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fce6e8ff062a72be6fe971671284cff20cd93018d298c16ec42209d28f5de7e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:02Z), 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/QZES72487250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1dde8e503537c1a64dfedfae27909c2fc1727c45fd0a982e3be33a3255b51b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:11:37Z), 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/QZK6J2481137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec02c1175b47c06b749ef5410a57ac9e50b1e4e0d6ac7f51ceda50019b1df7ac. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:42Z), 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/QZMEP2433566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e4d57e5c5fe17c99ae95a298f3b19e839688ef25673b9485d0923b02955ff. 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/QZMEM2474280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1dde8e503537c1a64dfedfae27909c2fc1727c45fd0a982e3be33a3255b51b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZK6J2481137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957c94de434d0d8f319d9f42e9c39cf652fa254a9f048ac0944d90aafb1dd03. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZMEP2431486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200d78d4d90fa2b9a0a382a4d1cb648fee6f36475baa6559c5e7b70e27f952a5. 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/QZMEP2433567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391fcb317a0639ef78c5aa7b88ddc755f0d88716f5019ffc8fa4f471050a953f. 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/QZMEP2433568.