thumb|right|SSW facing, vertical declining sundial on the Moot Hall in Aldeburgh, Suffolk, England. The gnomon is a rod that is very narrow, so it functions as the style. The Latin motto loosely trans
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 0x1fccfa5381874f7d09aebf1497b863a9c45826baab4e2d02745a475664cd9f8c. 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/71317601-853f-467d-9ccc-6a18df6c40f7.json and https://artists.proofprofile.net/proofs/artist/71317601-853f-467d-9ccc-6a18df6c40f7.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 0x0a0ea918934b98fdd6af386772967fddf5bba70e4cf3aa9241e47a134dddddd6. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLRD51630304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd936fa99cb15d22833711d66f49adb1daf2826bd4da141d7179c5d67e9366025. 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/CA5KR1541008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dde4fec76b91c57a04e88a3476a97471d3b5d53f2ae2ac7600d32e8ab3d00e9. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/CA5KR1541009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726bb028f9101c30de59afc6dfd29cf51703370fd0ccdc88fc06095d578c7d4e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR1541010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2481e770fdece043786b551e2f3dd9db1680494c49a947fac8f2e9ea7c408484. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CA5KR1540528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf962ac908560c42328d171b6be9ca82c7d8472fa2608d1786878ee3ffa64852f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:51Z), 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/CA5KR1565782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef89146115efdb3f57f12a0cfd9fa5ab7577e26a11ad0483ad3193c279997f2f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR1568064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c28d3147f7e243e69399f584c51db5aae7756f9a1456d40f1637b69740e1b79. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR1571857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3894c50e51e29bb2dd14ffaf763fb3b3d46f9954cecaffacbc93fbd1731594b. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/CA5KR1709756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac35539ab0e07d1026d50d76306deb25b682babacabc668a29c599e1ce9f38d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR1709770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b4925b2fc69bd450d8f542a7732415cea769e0f5dbec272ce9d35697e3e6e7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR1714393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2631fcdc0ee6913ed8338f0fc666fb4f1211549c1a261a8261440c56cdb3da6c. 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/QM24S2304342.