Kars ( or ; ; ; ; ) is a city in northeast Turkey. It is the seat of Kars Province and Kars District.İl Belediyesi , Turkey Civil Administration Departments Inventory. Retrieved 1 March 2023. As of 20
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 0x68a59b6c7074515dccef15001f05ed8939b45cd80b01e6a0760fe0f395a5113a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2384217-8832-464d-9018-050571e5bde5.json and https://artists.proofprofile.net/proofs/artist/d2384217-8832-464d-9018-050571e5bde5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c3d06ebbb8254d76715f9f4655f3cf76cbff43df9773cd787590d408c8fba8. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/NOA871901470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769aff4b25a3067736d3390db6297478d870d30a630c0b917aec49ceab9117d5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:38:06Z), 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/NOA872100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50eb5f0ccb9f3f7eb40bf25fca03c8a10017b27c76c1bcac08ec9b631565d53. 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/NOA872100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae775ce0b4e40dd730fb7a79b24b46e41f20c3ba4bb9ff414be0d1ed3c3b32. 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/QZMEQ2262567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a3dc7031e411dcbd7ced598578e43431bb46515b0e819abed74b6c69f3b35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOLEH2005060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae775ce0b4e40dd730fb7a79b24b46e41f20c3ba4bb9ff414be0d1ed3c3b32. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEQ2262567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b382e81c5514a79708d321b99088d0f812629b9bde56806bd65fbb66f1910fa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOA872100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22511c0581c8020255bf0d585bc648daa2d31803f6f39dea2e0875a0dbcb8a08. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOA872100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021b2798545e18a8e01fe59e7b9eab568a7fe5ace8916e552f7cba6d620b35a. 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/NOA872100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58766c15c70062148246fabda5d8aa0efbb2728560c408ebbfcdf938688e312. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/NO2DY2200033.
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 0x16be63c833caf01328a9935b0a7be3d30c255c882453b5e5498bad4d70e6307d. 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/NOA872100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5634f9af5557deaa522c17a319fc75fc236d556e888ed1fd1145f5bd9fe6cb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NOA871901460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351ddbe07b3b122a2a54843bf6091fbc40f10f867355d2646146e45883b2278. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NOLEH2005050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf235c868c767325d3a08ee3c6e168ade5923d52dca4d9fd4008947eb6d71b9d3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NOA872100089.