Kobra may refer to: Places Kobra, Estonia, village in Vändra Parish, Pärnu County, Estonia Comics, games and amusements Kobra (Mortal Kombat), a character from the Mortal Kombat series of fighting
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 0xbc7f7440287c4007ab87d8293ac29fc2f3bda7575427168d3f4ce858d3a7c00a. 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/707f88b4-fc6b-4f54-b772-bccf64bfdc23.json and https://artists.proofprofile.net/proofs/artist/707f88b4-fc6b-4f54-b772-bccf64bfdc23.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 0xb15dbc421d61ce9d0987e367f7c0b569f9c33b5ff09f64630e390755e2746d70. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLE951201469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1f7576a4eb551928fe41e3eb66d1075f5352b78b82fba435d5b01c5be3a05f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLE951201470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87019780849206d2564add45f94df8a2f878b3f52ae34a5a4fc7ea6badeee80c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLE951201471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf5992157487745b43bfde70c07025225b056f7a19a86dfe0f1cfa6d7f97b3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLE951201472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7b3c3e134608833871e9612a16a0be8f883ca7efd62c61e902c81db6cdab33. 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/PLE951201473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52543ccb026963b005590a535408aae200a959cce320a06e18c9096ac1623fa5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLE951201474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d2aabd34145afee0a8d798c31cf3d449b921ba3f0cc9f4c6558b4d617e4151. 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/PLE951201475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d53a502ab9e2aa83338dfd3e0d816bfbe69780fdb2f6358e26a91c8c1f0898e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLE951201476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261906c9c82693c530d04d7af1e7ff919ae42962349ce1356f223a510b39855c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/PLE951201477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78ce10889fee254c1314dd626f28e6c4038a7c9fd2a3cdd0e2095b95a24b64c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLE951201479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6cd99b72fcf604156c1b4430f1dbee0dd6c1318030cd6921ea45cbe3b8d006. 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/PLE951201481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8a5e326e9ce66fb1b9552422db7b0f2925d6add51f3e0d4043b6b10b00c643. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLE951201482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40826a54812adc99936e480b4f804900f3e6f5e6225016a1217f64904a7d9e11. 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/PLI368386210.
Proforma 2 (feat. Hukos, Onar, Z.B.U.K.U., Bosski Roman, Młody M, Buczer, Kobra, Zeus, Kajman, Kaen, Zduno) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8e25e6a48c83ce521a0956adabb89c3ca8287d3508c6e973662865a64ae006. 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/PLF241401135.
Wszyscy jesteśmy Chrystusami (feat. Kobra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a70bb136ac4908d9fdca8f278e411c2644e67f48a7b5ac26325f07dee17bd2. 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/PLF241401379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43784ac4a845bb1075766fc16144cbc41a47a2fda301845173e9b1292999006f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC061807383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e55b392cd96dd481331f7f1040e672c7270bd325a311df5508d7a3b8b747301. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLF241401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193ca95acc9ee00e636dfe41dbdfd0ee50c1666a353a396d365f64e268c836e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USN6Z0800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e211f4830e3f1b71b96322c1798b2586ece196309a3bab5d9cf250bda89fb79. 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/GX8LD2405924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1c8ca4457c5e1af4c96a6633432bc2cdf64ca86c351fec2a90c8f7672800ff. 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/PLF241300790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f23955b1cbcb9b0ea020f51dde38a0dd854a0196d2012660c7ed8eaf2709fe5. 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/PLE951200775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39fb0349c098c8908333a4a9f9ab50eabf874610b98b77a19eb5bf55d6dfeaf. 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/PLC062120096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39fb0349c098c8908333a4a9f9ab50eabf874610b98b77a19eb5bf55d6dfeaf. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/PLC062120096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718f7f193e3bff4e77e8ff7b91e31c84069bccb89d6cca7b3393366d43d2d210. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC061807373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89c32c2b71a30d641e3b0b13384b8811f8edaccd9e16da353316c165fdfb67f. 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/PLH651700208.