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 0x253de318a2eae86038619f509575791c606dfcf7b0a9192dc60e29cc683109d0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f02a4366-d844-452c-8f37-f94ef6092568.json and https://artists.proofprofile.net/proofs/artist/f02a4366-d844-452c-8f37-f94ef6092568.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 0x14d25e7e937bb4145e4d6f0e05d8356a4aa0e7572468c6f6737c9299a1c3efec. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USAT22301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e435b80f0f27a853f74039bdd7f73c7be2337c7e5a69f5a8ebfc3c01eb6463a. 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/USAT22304754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55469972b1bd7730d44021c652ce78dddd8995577598da7b5204bfc1e70698b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USAT22304788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e435b80f0f27a853f74039bdd7f73c7be2337c7e5a69f5a8ebfc3c01eb6463a. 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/USAT22304754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d25e7e937bb4145e4d6f0e05d8356a4aa0e7572468c6f6737c9299a1c3efec. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USAT22301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6baa07d0c00f9d54859e2776b967fa0c0f4edc1ec1b319d33128e026211e4a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USAT22314113.
Whistleblower (Sync Remix; Extended Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29b82ef6b570b2fa6a38353e698b2ac467de0db32be18fe955a9c4cc96661a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:18Z), 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/QMDA72583170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb41ac17dbe1d954e8d83271bc4b773b1ab4b793b71bfaeedf946b0fe6abfef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USAT22308211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb41ac17dbe1d954e8d83271bc4b773b1ab4b793b71bfaeedf946b0fe6abfef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USAT22308211.