Karl Marx (; 5 May 1818 – 14 March 1883) was a German philosopher, social and political theorist, economist, journalist, and revolutionary socialist. He is best-known for the 1848 pamphlet The Communi
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 0x0b71252b98c368ec2879cc6759f67f015965406c9957bc5329f2d0442ec856c0. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ce24d4d-0ea3-4339-983d-50e821831219.json and https://artists.proofprofile.net/proofs/artist/6ce24d4d-0ea3-4339-983d-50e821831219.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das Kapital (Kritik der Politischen Ökonomie)
Das Kapital - Kritik der Politischen Ökonomie, Teil 1.1 - Das Kapital
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 0x2460ef09776a6b481bcfaae40eedeb9cb537bf03b39606adf689c968cf9c7f5e. 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/DEVP81139458.
Das Kapital - Kritik der Politischen Ökonomie, Teil 1.2 & Das Kapital - Kritik der Politischen Ökonomie, Teil 2.1 - Das Kapital
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae5a6b6f4e99327be7459e692a5a10bb307b6e71959d28dc5b2a8d7be33ac1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEVP81139459.
Das Kapital - Kritik der Politischen Ökonomie, Teil 2.2 - Das Kapital
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab21a262740fcfecdd88ba5397d0441169f88ce2b9d2ee1677cda982127e50. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEVP81139460.
Das Kapital - Kritik der Politischen Ökonomie, Teil 2.3 - Das Kapital
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01af9921abf8e1a876f3f71b134f8bac678f7562daf0a04535ee01b2df23244. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:55:59Z), 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/DEVP81139461.
Das Kapital - Kritik der Politischen Ökonomie, Teil 2.4 & Das Kapital - Kritik der Politischen Ökonomie, Teil 3.1 - Das Kapital
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a54853704b7be262e2a1e6f40acba304eb027ba550c7490f1958fab33167e94. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEVP81139462.
Das Kapital - Kritik der Politischen Ökonomie, Teil 3.4 & Das Kapital - Kritik der Politischen Ökonomie, Teil 4.1 - Das Kapital
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb921f4f1a2f8eed8444e598313bba50a86941fee17ec361ce0181b2a82ac88c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEVP81139465.
Das Kapital - Kritik der Politischen Ökonomie, Teil 4.3 - Das Kapital
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaace6740656de4c81f81c045ae673e8f64366e2e47ffabca13f2664d9a7bf7e. 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/DEVP81139467.
100 citations de Karl Marx (Collection 100 citations)
100 citas de Karl Marx (Colección 100 citas de)
100 citazioni di Karl Marx (Le 100 citazioni di...)
600 citations de la philosophie politique
Capital: Volume 1 (A Critique of Political Economy)
Capital - A Critique of Political Economy (Unabridged)
Capital: Volume 2 (A Critique of Political Economy)
Capital Volume 3 (A Critique of Political Economy)
Capital: Volumes 1, 2, and 3, and The Communist Manifesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52904f271edd5be427d686e7c76833abd9fdd97d68c3a7e7e02b1c514a04f17f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB690668203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48e6476007d4303628917f4e0ca788e274ff26ddcb3dcebfa3aaed140d31617. 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/DEB690668205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f50d5fb0c56ca9ec7d45c4f627fcbd4574d72c312658fbbcf7a2720c98e996. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB690668208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c97e36fdc331f2083da8359ffe1f4f22d7e230e4a13ea4fa81a5b7685b52ab4. 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/DEB690668211.
Musik: Die Internationale (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e2e757974a990cfda45c8a908d759a990f04b461e4d7427b8887ebe614613a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB690668201.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b4eaae8899ff2905b41eac1e51c9616bddd1bc13a0eb99604e8f794395cbc1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB690668202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e942339bda50fac69b3e5ab8d504ea896144d56c53f03ef7f9f9be27938727b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEB690668204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ff21c4e20ace2db4a981043534ed4db0377b07fef17b4e452a9891419aebe. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB690668206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e9b6f0a5635da95e6c1b9bbf08203489c7b0f702f12fab214349d15df055f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEB690668209.