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 0x569c3d7847d6e0bc44f1fa2facae25633093a0cc6266717462d9adc5f7b0abb4. 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/14dd7e5d-739e-4fda-b7aa-b8d9fd509de9.json and https://artists.proofprofile.net/proofs/artist/14dd7e5d-739e-4fda-b7aa-b8d9fd509de9.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 0x51ef03ae9512c37d410e4f968f339b3d0862a9e7212f5aae77a8999488439d43. 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/MXA3V2418331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc172c73a24efee96337edfc916ab89c1b155d91cdd7ecf361f0ebbdd0f4636. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/MXA3V2418324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ea475bb8ad96418c47000f7ca880bf636f17759032109f145244e460a3b054. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/MXA3V2418329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa82138d3516d94e24da982d5ef1914c1fb8aaddfe76ea2d56d93ba2a279db5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXA3V2418421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a1fe0900931c014bd1a203f2dd8bb531022264b7bc2308d1141cfa8b987e8f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:08:32Z), 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/MXA3V2418580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d813153569dad1cc9d9e909dbd831454a660a5443ea74cbad55485abbc79d4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/MXA3V2418582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f3f76c3a4a9aaa3f65d91ff35f320a68cae857a75d6edd54d496ac69ce570d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/MXA3V2418596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edfb41347a04454f4a49d5b215dc809b2701d1ce5c3018bf77ff6d924d3097f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/MXA3V2418605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611182d76367a9e7081c8a73f01034d81815807e13d21933f95ba81e16e210dc. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/MXA3V2418611.