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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f170e8e3d55d0532e13a7021b22f0d98ab23e5d3ba0706581145585998db4. 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/edf5d5b1-a51b-4a3d-8272-77601cf62093.json and https://artists.proofprofile.net/proofs/artist/edf5d5b1-a51b-4a3d-8272-77601cf62093.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be4c1aa0be64616dae0d656a472ee6fd341c51632e933c0949875843df1701. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6A92399366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a38cabaa244ef8b90b4889e75033258c5ac1c36013380323358652ac6d9798. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2478569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f40ef9ef677185738cc323c3e9a7a8ab479127101b2cba0586fb8dad13c9574. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTRX2237065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2921c923121186e3b2275bfe8bd45b87c68ffbaa5ac667cb0d4064515d362c39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752443691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726bd106f136be86fad639a1a556e0279f70279715e46020359b18461b27ff9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6I32487532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5887f4ea662600a84e850938125a6dd36ba71df2b73e8929b0f2f600a2a54fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE66N2303911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98013dc964b712825bc4a43111c7ab8ee658864d1bd02e7ceee06662b9ae4bf1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2368658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8670ee65c60e923e81332dc69c771902a80fc88fadccee738c690380efff1baa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2379977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e2b7805bf342bbb4a8dc284373d9174b669d6962e774ab1b0fcb0f048b568. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2369001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf52828850cc0efbf973184f06a20f44084c4ad3d6c80eee2effe5a5b0426ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6A92388025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc579169f69fcc95744d5ab1a1be786543b4f0f2df0531130ff7252bc47e1168. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDD2370219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53bba1e438da046367211a46ee29c6539a63cded047c446adbb441aac7519c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FN2313432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb01b9f58cba2c7411a4c4712b7a0aeefeb6c7abcc53f50cf7dd5e5b6a5224b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6SA2236890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d9a0b1fd619f482baa34b4e7435f886132782a3fa90f07c93ef317510e913. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6HN2226192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4808310b2f5ef292aff33fdac75ec3c92ea76384a44d20c2b5be96560eb34d9f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USX9P2000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7107565a5680ecb182489430a2c20855055e027631dbe1eeeb976c2988cad8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TLVEM2468037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eca018b863bc5c0ed1d27a1aaa0a7364a1392f6b7f41b990e14d8b8886b32a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FN2208788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1021b1847aaedf94d64454a35838bec38de0ddc5784169b607979026151a0f74. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FN2208789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445e456294ba6fd68634e7fa48017a627e2cd8102a1937d8ba844e78cf6c7116. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FN2208792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac0053790c817b452ccef788c9e26bcee0bd832e86fe43a7edbe11e532079c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU8678328.