In Chinese philosophy, a taijitu () is a symbol or diagram () representing taiji () in both its monist (wuji) and its dualist (yin and yang) forms. A taijitu in application provides a deductive and in
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 0xf89bd7e375b4b9c66e55244003abaccdcf7e673edf6a21875640d6b7524079ef. 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/e28d9ff3-0411-42d9-99ca-313f47e9d7a0.json and https://artists.proofprofile.net/proofs/artist/e28d9ff3-0411-42d9-99ca-313f47e9d7a0.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 0x10805c5c1586f1aa4179adc5e37d5faf60fc92c098c65536add978fadb54783e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:22Z), 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/QZES52001474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515558b5795fa1ad8e439fb1dfa97421aa384ac22be928f373a62baf96c338d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN82007750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0894660403ead221e86a8d7cc6e21510a4f041c2703f5df329f12398bd4404. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82007752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e286046188b9db676fbdbad45e9e640f5c8b2321d1e22fca876cc39a6d20508. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN92192647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713a916404685da36fb106d9de38e4eb5c7d27cc333e44e5c94401ab3f447db. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZNWQ2246954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f247653e6cfe1b275414aaa1006b0375302a12830b5faa2c8770f663c5785bb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6Q2301151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd083b889b88cf6f77ed1ec9fca46112228904ed4f25a4aa3a4621c62a5a39580. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:25Z), 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/QZHN32578229.