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 0x5e28ce0087d11e6055db291f48701b80a0193a820c32b764279837687c840238. 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/6c9ec8cc-5f27-4521-8a85-09ae7d5e57a7.json and https://artists.proofprofile.net/proofs/artist/6c9ec8cc-5f27-4521-8a85-09ae7d5e57a7.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 0xbf71857a7b8815920b7a045471136b8c0b5a4f5117528cee17ee0746b08c2f27. 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/TCAII2459584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1f9acb32d6e382c2255d486b2e5bd1add35d28bc221bb7d501abaa636b0235. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIT2459069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14783833b30dfa2dbee2d1c7d5c4bdbbaa036a92da27e7e5e7cb12c4f188d2cc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIU2457835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd653d38fee9e659d5b4b5564188abd4e952a48e85e6e9a5ba3d5b3e4b46b6025. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIT2458485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa557783779e1026e3264fd392493707c102f187a75b761f6769cc5dc8c6c2465. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIU2438926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe604c80dd3c8c80f9b69e791cb90eb138cdb8dfd6284460a67581462ab9aec84. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:26Z), 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/TCAIV2440285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a95012a09b1fa41c5d6d800f7b74023422204c1885c3c8866f6a8e469558c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:05:09Z), 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/TCAIW2496290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71522428540aeae38e254d1504624afe461ecdbf2384524e26cfce809b901f72. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIY2423561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef9773b0d12f11b3e74796aec386de083df9b7ea60b6687b90f54c323612eaf. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIY2423196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b387404fef75c9bb8d19b577733a24882e109440d735fbad87e45676789264. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:41Z), 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/TCAIZ2408522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde76af3a645fe31db110b6dcf9fd768e61ceb4fd78555b90fb1447a760b6d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIZ2456415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ac3d14680589488883323b4f02da0d09a3f3aec71ddf6a9ac961a861108b0. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAIZ2456511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d11fe0cf24d83031140a95ee61d10d83b0a228304564a7c4d9c83cece05c51. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:40:09Z), 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/TCAJB2491823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766939ffa5a53da70ca4ee2735a3f710ce623cc07da0b11c2a5a755e2bef35d3. 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/TCAJD2590239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca0d254f5f2bda59c82c746a16e8fcd3cc43ccdc25f93ae025df57fdfd8dd6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJD2598573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e9d16e01c014cf8edab286cee9b77c4c17e6256ba69c3040921f1285bd5adb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJE2511664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692754aaf044e1152f7a14ad1989abf5f181483071df824797af7d6009a6c0bf. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAJE2595378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7cbcb5db44d97e4455955a1c83fbd375c0fb02904f18d893a6557df0b00c26. 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/TCAJG2534434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83c5b268be29f0f950306ac53920a219973d5549366608039aecc00e940546d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:02Z), 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/TCAJG2555116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6306e254e96255f1b9372837462523c9c4d82b04802000ea64bd6a391fb33c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:43Z), 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/TCAJG2577416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554aa7f854986b3c7efb55412d0c3f435d81f49ba9c91c1399ca9a59a33a1159. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJH2520314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d43d3809759ffce3828b15e74675e7f0d6186113a0cb1e6532233b3b32aa5a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAJO2502560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15b55217ecbe8793560e3edcbcd5a185640fb901bcfc33e7bf7eadbb9ced776. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:45Z), 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/TCAJS2567963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe501f35c60eb5ca6bc90b6af413cb0c5960e39a07ada41fccbfcf9ad102f5f9e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJU2508762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9ce640f00abdf24d5def7bb6b811bcdc1e9089f0fc67e390d4593c0f6f4639. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJT2558642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3782252e26343db4b970d06816e9635ce5c11da07ac90be4967254db9e5adfb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65W2568814.