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 0xe4972145ead835ef79a7816f83b546d574c84c4db8facbb738e83ec974cd0eff. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83423c18-e3dd-4326-b047-444c297ee587.json and https://artists.proofprofile.net/proofs/artist/83423c18-e3dd-4326-b047-444c297ee587.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 0x4f507c06a59d6d6faaa112d62b8db77660bb687abf87ec9f43df0c1ab3a7a1ad. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:41Z), 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/QZDA42012915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b122c7f9d5ffe88823276d3316e971da02b2ac16daeccfd03b936336bce2634. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:02Z), 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/QZK6J2078309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763b8cb5616c49ce59a111bbfd8c78f6ab1f5f2c38cb7bc5d68ab02949e46e4e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6Q2159140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fca4897d76352011cf96dcc44b08522bda29e495dd0d3c022a3462758ba50f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTAT2188304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d6d72c1ca2426c547643715c2c42f00390e26208db90f68b68dc0f181f16c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:18Z), 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/GX8LE2319485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3460f2ce98d1eb617fcf1951420d15ea30657245fba46acf477d6eac03d9a7e. 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/GX8LE2379933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4fd8d28e9a0a13257817f0bff85df9090616ad9e67ea744de199ed693a290. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GX8LE2325567.