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 0x6446b509fdabbbc57f5acb2050ae79c8505d8691a6bef9b1fdb8aa220ef16e3a. 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/e5dbb27f-bbcb-49f8-a35d-ffcf970fc0b2.json and https://artists.proofprofile.net/proofs/artist/e5dbb27f-bbcb-49f8-a35d-ffcf970fc0b2.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 0x3d6b142603ebde8c0702df3ee5c4ae87e06576a6f705d3bf2778772f45b622ed. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PECR22402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4f9d0faeaa38624373dae69bdce6e78c524179d5a5e5dc80c646d6e396a07. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:26:44Z), 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/PECR22402028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf912607c8c6156d5a18897d45b89db53f3723df8317cdd2943e79d4cc4ec49. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/PECR22402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be375acf9a760781ba5f568fa5332c7927279c99ba1635a7a08b8db9600a37. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PECR22402031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcffa465eb2b94fe0aa44b65edd375b0f03a05426242ef2d01fd0e7610b29d. 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/PECR22402032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf076682fd5dbbd165ce0b9d40f59e6522a870b6ddc4da76eca401a9bd82cc3ad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PECR22402033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe406e050e5454d88fdc3aa2444b53cda38a9d35f22abf61c3e291bd9813a45cd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/PECR22402035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c325c5d2eef4deeac6f76f7af6ce57d7dded079d8713c85462cfa363f8f88b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PECR22402036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aff5b8045f5158d6d7ede01ced6db1b25580dec10169ce786e91af3d78ca22. 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/PECR22402037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dda105340fcb54e217b0355d245c6733df7920d1a6adf1b4e5f1e6fa76a5ef5. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/PECR22402038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b94c1ccdaded10b6b7326e6718485e5005b098935ac4d939d8ab41ecde73227. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:46:54Z), 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/PECR22501484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5fb4d142f5200bfbebd032fc6027fd30df0df89b08cb9f06c479af33b55b05. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:54:09Z), 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/PECR22501486.