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 0x6b1c6e59979e7758d89b2d331789d77ab27968696e2241ccaa5d7b537543b5dc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc849369-53bc-4ba8-8324-49c80f34bc91.json and https://artists.proofprofile.net/proofs/artist/cc849369-53bc-4ba8-8324-49c80f34bc91.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 0xd4d6e53c4c9c7da5285a1bc234dc5050af4d30247d7a3cf12d98cd0cff1784fd. 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/ES64E2493226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ac10de72eef6e5e1fb386f78e989a29e06b9299d3a78a9128963676b397279. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ES64E2416443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ac10de72eef6e5e1fb386f78e989a29e06b9299d3a78a9128963676b397279. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:06Z), 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/ES64E2416443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1be6a26a7ad205af0abd525fe562ae3f8b21edf4015ceb1d242e9c04a53a9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:40:39Z), 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/SE6SA2538520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc5a8e79af884f115eb00b72c55704796338f699b7166d13cd056cc02f9b04d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:29Z), 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/SE6I32509582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc835b45d4b55f76dd06046c9a98b72c160f8bb05c08e5b155162401f7b9d6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:34Z), 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/SE6I32593043.