Jakob Martin Strid is a Danish cartoonist, who is known throughout Denmark for his successful series Strid in the Danish newspaper Politiken. Before his mainstream success he drew for the socialist p
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 0x011ea815c8db93d6a067d467550373a20a07f8f6e10ded43b03493a2834b46ec. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bd5ce66-c459-4c65-aca9-8757de911091.json and https://artists.proofprofile.net/proofs/artist/4bd5ce66-c459-4c65-aca9-8757de911091.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mustafas Kiosk (Lydbog oplæst af Povl Dissing)
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 0xd2f1cdb79dd4cc2f5ab05cc6c6f7772694ba46da30301433693f2ea541d1b733. 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/DKMFC1000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21aafdc7132c5c22b37a336c4c929e423f754db0a1e85b6100d62d1cfa7e57d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6b515500df8fc24c175bf20dfbddbe90f08809bf76eb1a08d1c815f872ff2f. 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/DKMFC1000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7e9707657544683ac3764dcb2ba8f417b1396e458f60816320e190308850cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb118973837d2803cb45b8321731f5584319b6b7b2cb3d09ae3bceb2b7159c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef2982bf978e95bf589f766dd4f8f3bd606debd63d890e69304079e518f791. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860df72ab7082a901b9a1577612e3221b2fa8a25b0a322a55777a353850620b. 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/DKMFC1000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802fe3b2c61779d1953e774ef9ed1416c7a5f46f5b2fe9843d88923eaf9c91eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23f73baa2d0f5892624e21c7922b90acfa4bd9df1e30c3c029c98b8ff21eb2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DKMFC1000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9f218aa11e53e725ebb36c985402915180e9619d964fc9e84e196fde5fc51c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819ee609d0e5b27cc7d4a9376820fa490d8f08cc6e42b4aeb1c8eaddc5ad9667. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d96fafc7cd7d5679d13b60840daf09dbbe24ad9c40178a5dc4ab1ca191eb068. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DKMFC1000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf58ec478fa13d2f1f72b40e1c6e9997a65724d66c1855b4535bd3a343ab5179. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DKMFC1000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47028d483f33e107953aae322b0efb7649a4eb4837a5bccbc2fb5c6075bbc7b3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKMFC1000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd684989c9f66dee37846cdfe2f0eb056e6cbe6ced0f8e54bf491192269fed84c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DKMFC1000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad81907137e59802095edbdaefd12168afc6b0c9a818381fc988d50939d8b1e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DKMFC1000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b320eb25ac7abe434bfb6eb2f2cee731b795faee7f8e4ca761330cc2a02e35. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:41Z), 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/DKMFC1000209.
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 0xec4c62d40a88b0d71e14db1e37945abf2f790e56ec17bf87ffb0fc31ba6053a9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DKMFC1000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed4929ba0846bfb7832243580f487bb98c4ce009f056f6bac5e6a257b45c72b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DKMFC1000205.