GKR may refer to: GKR, an artist contracted with Mad Decent Project G.e.e.K.e.R., an animated television series Honor to serve Riga (Latvian: Gods kalpot Rīgai!), a municipal political party locate
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 0x9411063a89864b3f53bc2de706cce1201671937132b2cf8b66ed9394b309f25e. 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/d08a0de0-9e92-472f-820e-73c23a30095e.json and https://artists.proofprofile.net/proofs/artist/d08a0de0-9e92-472f-820e-73c23a30095e.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 0x28bd9f1454b910cdd8d785f3d1e294fa503111e8e31302ca0d2e47a4553eb2ee. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USCGH1604187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacaaf158ee23042bcced0f081ad3a0b3b77c5cde7f8d57c96a0e433af6ec3f3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ISV441841101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447a579a9e248a25072ae30fa575cc8d066cf1303e6e5a2010f51e0118430f92. 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/UST8K1876415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049b5f0394a99d9874d385a878ecddae1a7e00e727f8cffe15e598792df9e247. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOVXD2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1560ce277f085d953c65fea2fe14aa7a6f148e39e1ac055e83d4942c19f9eb. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWV2535844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8e673c9b783d93a6e2432ce9d6311b996f59869be360b4742da8e487cdc7b. 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/QZTBE2572676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe866fe74f3cbed16d75e05c61c09da60a95ced9d3ec01a077158a3886dc0bd55. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ7T2595905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660476df6363113b4d56ca32375f4c12c02e279166df31110b29fb417483e3a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7T2598987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975966e77829e34adb97409bfb15185bc756e1b5061006b69384dba6f004f9f. 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/NO8WZ2204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639b2bc10b8252bc97d096a9167873d9589b59aa0634d9cbff1bbcec11712b97. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NO8WZ2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2eb913908c337b7a7790a9f23575a1e50474c7afd285a7d09d71e716bcf50b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NOHLX2460070.