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 0x7d59950bc3caf8ec524f2a7785e05a6e2cfc5afa9dc5cb63c80bf0a335b34a15. 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/df7450c1-027f-4cb4-913b-a215ef5025b6.json and https://artists.proofprofile.net/proofs/artist/df7450c1-027f-4cb4-913b-a215ef5025b6.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 0x130e04b720aabce7eac724ec65724ae958af428754b85995759b596ac6415e06. 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/RSA291800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb3e89641306d36b2d61523d2241e809a83ed2be6e4da74d6ecce732216812. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:46Z), 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/RSA181341425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a8622e54c653266d9ad63806c166f330a6aa206dce59b7ec8bcb3aee9e5b4. 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/RSA181342120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2a528b5afddd1ad91693a4e2f49e25a4173e5c2a2bfc8948a50ccf2f69163c. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/ATAJ12301742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd8d0d2c01bd6653e2a8d44cb45c8706cf09596b240f7b465e0ba32eca7d87e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ATAJ12301746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddceca915d264ba110ca4d11be7571d2c360d209877435f98312248eca00151d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATAJ12301745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1c4360c9097276729136cca12a1313604837fcff013f58eacba58ef773b15d. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/ATAJ12301744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140e1bf8f124d36e4b566ca5a3332a2dbee50453fd5dce9be356c37a2c27350. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:31Z), 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/RSA182344164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d5b350c0228870c05919cb45479e2196d87d5f6e8304b7009d90b3c235d4c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEKB72517174.