Year 168 (CLXVIII) was a leap year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Apronianus and Paullus (or, less frequently, year 921 Ab urbe
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 0xd085106ab20f13f4fc04ccc804e1963273bda7fbe4c02b034967da3ea13d2961. 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/fd32f742-3a3c-483d-83e6-74e07de01ae6.json and https://artists.proofprofile.net/proofs/artist/fd32f742-3a3c-483d-83e6-74e07de01ae6.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 0x3ce9764809d6e921687c05a7b534877d9ef6a681c84419554221824f0009be03. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MNA032100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf619608e354f3a9123fa593c281ee8fd26c22962f36f7b70eb8232abc1f590aa. 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/MNA032200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b9e96dcda7695e52e47511b929e231582996678487c42fa5b500da0c6a118. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/MNA032200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92300039c6038e087d77e9985c50a08de3afed7f0494a56b9ed0bd498d3274a4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:11Z), 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/MNA032300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fda4753b97efaa37520658bd01bc0d017b9a2a1fa6f81cb1eb2755fea0dee1. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/MNA032300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c14fa4c3c662b49e3dde9210534aee9e3d73a526fafd364b74c1d726b3f96. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:05:04Z), 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/MNA032400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895c228dc6f37d18fc306522da96be67a3972457d7612e7dda823d83fb7167a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MNA032400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed032cf37776ce160d18bbf11c2e13f263059c89533dc2ef0360ffc66ecff200. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MNA032300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6962cf83ebb5ce5dcfb2089cbb0aea866f857dafc3d3e839809fbbde0ce2271. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/MNA032500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be29a5f47b0a2ca874133977790c92d044cfc9a2c7d370c065070935a0e4fc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:21Z), 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/MNA032500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91bca4ddc42d6de8cd1889ce220f37a4df2a410d078fdc32e355a84c9ed1fb0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:51:53Z), 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/MNA032500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299b6d56c10ae7f8f5e073dfae94a38b5e605ca0e822a6191b153e326e98022b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MNA032500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665e9b959c03e9827e158756c2c190623927f7b54cb3e6e8d87a12c1658f963. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MNA032500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea1546cf6da66a3d67c5bd1a90351970dc8f67069383fb134d17beb86724172. 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/MNA032500098.