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 0xcda09bc99166670d75b94a534bbfc3d94b5b0ca33de5eae9d755997cc8a1bd4d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45b804f4-f995-4ae7-b98b-f5089fbe7b4b.json and https://artists.proofprofile.net/proofs/artist/45b804f4-f995-4ae7-b98b-f5089fbe7b4b.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 0x57d9066e8031eea8004e1bb466b4ffc18a152f3379c0483c7890d541ea81e20d. 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/FR59R1910233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69a992ec853aef0b34dec8ae28ed5f275d01b6492ad3fd6d15d5bdda74c4854. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/FR59R1910234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126901752c2c884de6aa75fe8fd4e23204c1f3fcbd386b365dc1e2b0aea481f9. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FR59R1910235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63beea1663704cbc54568dc19ffab91aa8afb24d4d0d2a87055c8f91a8e94ef9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FR59R1951526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55abc22e8b1299fd06474d41eed2f2388183c148d2d0dca314d588c5e71ce3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:02:29Z), 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/FR59R1910335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88ac34478073d4d703f7911d3548ffc42c5906d420c5a347c586094ca9b5a7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:09Z), 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/FR10S1980124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e11a32ec1949dfa680f8c2e2433d480dfa7526c74302b4a96e5c075fe4af438. 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/FR59R1910237.