Kubus may refer to: People Lukáš Kubus (born 1988), Slovak football forward Richard Kubus (1914–1987), German international footballer Other uses Kubuś, a Polish improvised fighting vehicle Kubu
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 0x18235af2fb03c5ff369ff05128bb7321f7d9bf5c31bf37fc0996828d24309cfc. 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/a666d57a-baad-4746-aa8d-ed89934a5b27.json and https://artists.proofprofile.net/proofs/artist/a666d57a-baad-4746-aa8d-ed89934a5b27.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 0x453460f08a84b9ae8f5ba5a9536947f377247a43ed22a5fcf8e55cf036591b2b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLG660400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e851fcfc64306a8b4a96c4a2affb5852bf900e31b2bbefa1e2c96f92bd57ee. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/NLG660400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8bc608a4beb3993357f19798b9a732a055ba3dbec7d8a0fad2daf5b64d0f2e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLG660400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca1fa8d4bc5a369bc89cacd14b909e75dd7efb31e7174570dfadc94e86625f8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/NLG660400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885ba65bfd4b2b20a34f7d627388401c8774b6a8c38195c87d8396f3dd736e05. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLG660400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e38282c5bd46f714802ec76058a4440c8c094c1e96afb204f630b1ae3f0b123. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/NLG661100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deee164370237914d456498b79634f4d9d5f5293231e27cdf15546c6a646a1b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/NLG661100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018f30d934b1e1e8cd9e83d4d435611110310064b2f3b367ad481a419bfb4702. 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/NLG661801050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0997be3e444e060fbef236187fbe3e0614391369dd348aa11c7b04c271f82c77. 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/NLG662000797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c137bbe123e5e23f7b662442c5387ff3fb5d7ccb89ec917b385a6069b8de5d. 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/NLG662000798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e3fb5d5a56cc0370012238f728aab72de38b043c3a91bafae392093c728cca. 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/NLG662000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94cc12887a0c25f8d708f70d1fa57a984e38a37ece462fbc42251dd229bdcaf. 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/NLG662000799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540f7b1863cfa841ceaa60e4b732f19029eb26c92a9b22879a23b780c0e36ce4. 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/NLG662000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bb5e2adf68e22055c9f8355d54f82e5c423cedcc2987a14ca76adda4030b65. 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/NLG662000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b577ef0a8ff172036ab1fa56d29560f891c257cbe2d42e072e6344d2c3ab5e. 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/NLG662000802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3f0480aa1c0a65f42935bc2dbe812e4f2459dd26d7f8a070d044acc8d5f9fa. 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/NLG662000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2916050f52841f45ead554e8c5a27b4b0427b051b5cb68d16537b52682c0e7. 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/NLG662000804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abf6c36246c61c386380362334afbb9d6ce00b97775c0f20a974eaab27c8f0f. 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/UKACT2520193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28632ede5a5888d0791081f0a0f5d590068a1dd9fe1032747a15eb62a787046. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLG662400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b83ac9137e67a705329b60ee2a4cb324fcfdf7500970cc0cf4722a4c020ebb. 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/NLG661200336.