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 0x72c3d5f7395962be51a6a651ca5eb70cea50019b00c3579ad7cf71cefe2263f6. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/322af64b-60c5-4b47-ae34-9807cbd9c94b.json and https://artists.proofprofile.net/proofs/artist/322af64b-60c5-4b47-ae34-9807cbd9c94b.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 0xadee6b7335593843a65c044f15fa6b669bd5fb31951e3b7b3bad598e70f124ff. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:56Z), 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/QZHN92455769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbc1c8ca7df2bd79fdc354d48af1e26505634626e591de8292caa4b349aa0ec. 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/QZMER2492879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2cd0f8911cf14c959d99bb5ea71676297165cf191d217af140b945265ba73e. 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/QZTB42479274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf3536276b965e3c14a5d4cec189ce93a5ba1da2fef896c67a32dac597aff65. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:24Z), 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/QZWFL2412048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a74548379e8550d0c7b199b8643e83999fe2efa20bcd77d650abb05c23f05. 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/QZWFL2412051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a1d9b6e7ade29dbc174a31335f2c711afb9db8ab1ef8aee89b1abf8192ab0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3F32493997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d34b0c905c17c7a7799f04f67a02248b7abf9f5b95d920aa210ab9dcdc41e7c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:19Z), 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/QZHN62560311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a244c04c47856c591f1ef039428db6f6abbc10507ddeedccd2804b30fed3ab6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWU2538727.