Marko may refer to: Marko (given name) Marko (surname) Márkó, a village in Hungary Marko 1927 F.C., a Greek football club See also Marco (disambiguation) Markko (disambiguation) Marka (disambi
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 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 0x82b12c840aac14db1e258879f98f00c450aa003e0d880c2c32035bf6fab3acf8. 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/77a49de8-aac7-4da0-adb8-10cf16ae8fe1.json and https://artists.proofprofile.net/proofs/artist/77a49de8-aac7-4da0-adb8-10cf16ae8fe1.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 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 0x5affc74f12d5bfdec74a58fa9e83a55e2e4d3fb9b9b16a8211e9321e5615ec33. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZK6K2094865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369ec0bcebf9d14ea2e1631013f44f7ef3597abf2a3aa377c5049b4fa38b094d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWQ2094566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a383701217b66b49e3ec141ccc1125a522f694d7846699ebe5d51bddf396f8b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ72120953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7233c6b0f0617a84dfa74a223c2a1dec12fa58d2ad6e441aaddc9c8883cbe82. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZHN52113629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d083d44cc22fb52a7fa8bb83e58c2a8a346af2b32746a99193d2837af5cd1. 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/QZHNB2229449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e19e77de3b80b5523cf2104e740e8cb319fdd67bfcdd6d4a36093ce9beeef86. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHNB2229450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9c624fc2bd01bd511d89201b54c04cbebb526b0d899147bccdd299a8b1e12. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHNB2229451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c75c3efde789893cfcb7edf7105a5868a63cbaeed2892de91ea0a6b60c22381. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNB2229452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5391da1bd4f66c94e925922072254a421f2e2ac40274b4f8146dd51a44a78d68. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2229453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a8e4ede471c413166076effed6d2f904f0fbf8ae868f83e5a1ec2172b80c90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2332233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b84827fe1d20a9e1387a4e6f803811b1ae1063bb9c8f682b784ff877fb42beb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82361426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe903956bf447259c32d656629df9ed6f3d6aefda835bf67e683287537c93480b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2564017.