PC World (stylized as PCWorld) is a global computer magazine published monthly by Foundry. Since 2013, it has been an online-only publication. It offers advice on various aspects of PCs and related
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 0x31ad4a6ba9436d7c9227f5a926950cc7f0d42a6e82c185d709592ed93be57c19. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d46b3866-95da-4d1c-99f7-dbeb7df037da.json and https://artists.proofprofile.net/proofs/artist/d46b3866-95da-4d1c-99f7-dbeb7df037da.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 0xaf087ef29ee00a1b2a268b6092e32ac9ad3d5f573bb038202b1f63547534b8e0. 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/GBHLW2301851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555827f48cec5fad2abddf38d036de84e961352219129da527b59929b5529c78. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBHLW2301850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eeab6d1833f0a8013b6239336eee4e0090a53e2971d6b78903cbd57ef3cb80. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBHLW2301852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93909d622103c336b07af5c422abed1d5718b8719a5acb1d566be0d288b183b0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBHLW2301853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2f4d532e1cd43cd208c1e8c565b16b2561d907320f8c1d3db21cbdff34fee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542161850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae796e02efe417998148048dbee4835d87e5514f39dc77363e1b8c6eed3a104f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542161851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b19538af9529805d02c63b928a221b3395046be7ec0a48280384db2665ac4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CH6542161849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e32a51eecde20abb6554dc4055306a5a1845207ffd1a8088e40c2c2fb33bc4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542161852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c29cb6b85b81e9378b91ceff7e92a3f2d06af12acdfcda50265d6328a03eb27. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CH6542161853.