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 0x8389e3264bc47a3fc286e550c3fd1a0046eb37f818ec8a0c60e9f5bad2cb92ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2835b787-8f23-4dec-9ed7-c750dfdc0e31.json and https://artists.proofprofile.net/proofs/artist/2835b787-8f23-4dec-9ed7-c750dfdc0e31.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 0x9c2e806cefa90cd82163ee65b2e1de00727ac62ee84ab217fb80318564dfccc3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USUM71815961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c103887b668f88916dbaf28e0fe6d75e8f080c1376dbab53753a16b1e00490. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USEM30700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d815eeb0ecc673370de130aae8349d31212c0cd883c47403dd7e3d0c589be78. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCA20702784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a70ed15b6d24bd37681a0ac7ca7124b4a27622d7f2fdf9d2558ef2c9d504007. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:24:20Z), 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/USEM30700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b642fe6fd9f7ec990c7b5b9c44b6e75833615d659c2e31072ea00e5539fdd87. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:31Z), 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/USEM36500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad67480d3a3c4749e286832270e243bdb729d9d56121a016befe21e52a6150f. 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/USEM30700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2e31c3617cc94dc0386a27b41943f069c3114231ab1d9b91ee0580f9cd4a0a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:13Z), 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/USEM30700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779cc51296b7abe262e1fdc61bf1b6a79358824949c8ab05971d6f56b4a1088. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USCA20702099.