thumb|Common ash (Fraxinus excelsior), a deciduous broad-leaved (angiosperm) tree thumb|European larch (Larix decidua), a coniferous tree which is also deciduous In botany, a tree is a perennial plant
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 0x6e58a604c3873864333c07abace335c110b3ccf85e1b50856f34c6e2ffd78eaa. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/889e0949-07ee-43ca-9c59-8b75ebb38735.json and https://artists.proofprofile.net/proofs/artist/889e0949-07ee-43ca-9c59-8b75ebb38735.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 0xdfeff26e1dcd3514fd8a5c032e583ccda27e6f8b38861ef05bd79d3436c8adf8. 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/USA2P1421180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a5ef17b87361329fa2ba999581113fc26e6a843af05a32b63e1e8df96927c2. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:56:07Z), 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/USA2P1421178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde086be6adc2f7f5b983bef06d636b7e9da4a55b837fab1d14135999c027e95. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZK6M2500348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019930804be102f5f4de8f7ce6c634d21cc94457d32ddf09f8432d2698a6029. 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/QZK6M2503349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01120e21cbb51365b53791c04460ee4235b6ab4d358d2aee3290516f6c173d27. 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/QZWFJ2567014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd58b4042728b72c6a3eaa4e620c5654544c4db6fd16909268ac860ef2411b3. 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/QZWFJ2567015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a57e7cd04338b01743ee048531fc94f584320b42962e26ee59606c5c10fc64. 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/QZTAW2448666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f32106483bf5b470723443e4e7eb4eb91bc1c25d2e5d51c27959a811de227c. 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/QZWFJ2567016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51315472ce7aed9457490ccb966f40aac8d2e1e73c44dcea920eb1a8c75492d8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZWFJ2567017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe705544bf2b63441f4e2ef405c22fefbf2fcbe0d4156a4926c99173c81ea5a7a. 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/QZWFJ2567018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ba17c8668834c3ab785f3f0bd6a5e83f957e594bd80259f5445167735d488b. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZWFJ2567019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b26edc43b85a92ce2f2cec21d166caef479e9368c8a3ae28d0595d7887997. 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/QZWFJ2567020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94196082695bbb752741f80772b3440625f45d382d31ad168b18000d35f64145. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFJ2567021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441dc1f831319a687e7ce6d0e8986c4554dedbdbae2a206c6a7cc703609eafc9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:33Z), 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/QZWFJ2567022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8255652376f2587b9d4105926d75202b1bcee887e9a7b1299f408f20b874a836. 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/QZWFJ2567023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe775b543efb3af0af52a587fb56aa5690d3e842a76dbd1a41f2a40301f29fc02. 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/QZWFW2505569.
Worldwide Domination Vol. III: The Union
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92b12e877233a428014d034e9b654c7e04fdd1a7ca6b5a453aba9db2df480d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH0920724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf4bc0cacf46701d3346fb476c2535bf74eeab551917cc9169fb2b96be81e48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADZ1880283.