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 0xf3a5212e9e169c84f8531a785269f2d2474663b0d53929de973b778a5b0e2d5b. 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/2aeb002b-2e10-4d50-bfd6-063f6d7e456e.json and https://artists.proofprofile.net/proofs/artist/2aeb002b-2e10-4d50-bfd6-063f6d7e456e.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 0x4d3b9a28001ccd17287ab803a1839cae0e1baa433042e0f19eb2b5296ef3f9f9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:00Z), 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/QZPLR2038630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbdf0a3c5e5832240bc467574c2bb6656c5ceec359ccf379e10d6bbbce486ea. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA42112553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090582a883b3c290198158f50fad1f06064bbdb7bdc8bf21d458425a4ec05b8e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:13Z), 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/QZTAT2309946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384c3a85cb5cf6250e45ad439bcec2a49003b21945bba6278c639d9d2cba0af1. 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/QZTB32330124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe7b8b028371b9a5cabb19fd639eec1b442c6014991824bccc7e1a5d4de467. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:49Z), 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/QZTB32330125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc8efe656674a60eaff636a62b62ba8a2814f4384b878e9ce8db8b53d87e67a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB32330127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775ffe572c2e87e33298a1be6d20a8973aa08be75ef70ebe69a86d19fef2739d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB32330128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502d00be518e1a93da4439ddeef23de11ea8953362e87de240fb8e2c240dc94a. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZTB32330131.