KC, Kc and similar may refer to: Places Kuçovë District, Albania's ISO 3166-2 code Kansas City metropolitan area, a major metropolitan area of the United States Kansas City, Missouri, its principa
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 0x21ca8694f6dc9283a1e3220526b3d51a26036059244e089fed541e9a9b57d4d7. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa6d9bf9-87c7-472e-92da-f15214ffa29e.json and https://artists.proofprofile.net/proofs/artist/aa6d9bf9-87c7-472e-92da-f15214ffa29e.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 0xf28553596dec4dee45b39a2dd4ea33fee236086a6368f8e9e695d582ec772af7. 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/FR2X42157959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba996f9dbf962a3395be6254acea9f593bc3915028d8e29a3a0ac6ae7f07915d. 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/FR2X42157963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d4905f203869c5f367320b006d61f01ebb5a0d1f7d85bdfd35cdb77aa63271. 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/FR2X42155513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583bd9f4b788f308e25279cfbb56aa4da31dc0de64a8881e93ddac146e8887ab. 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/FR2X42155518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5d81c5f5ea8eddba89a59e05c67ab0ce38b60ff91ce4c493d79d0c15f720c4. 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/FR2X42157848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce9f4206ebed523d3cfccf7007e643dffe4631a2a5391b1ed1dd52b901edaee. 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/FR2X42158034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c15022e0f8dba33c9a0470e5f6e52fde87f8605aee595e0aa295c8dcfdd8c. 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/FR2X42158036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b96002ee2cef3257f6ce1cdc2f980bb79c58898bd3c51914863899d4b94837. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR2X42157814.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c719acf36c6b2a74f8e5d1012c9d67b62fce992f889a74d467e0b76f53d784. 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/HKE022232409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec37fef205448805e2a6a57582001a41bd1bc25e1eff3fb3732fe66a08e72f7. 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/HKG732013517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cc629cd5b51c6e7734f9049482b0750db345a267615c3d853993599fde9c2e. 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/FR2X42158541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bf8ce4e58aa485750938bf166dc63b1e80fc8d3647b34784653ff726161a6. 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/FR2X42158545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa01d4847e14cf0be94b1ed1ac9cd1e125266b4a56e285b9115c566e861caa7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:18:21Z), 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/FR2X42160986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aee5370079d10adb0cb7fabc93b6572969c9c07d7741cad8550d808af56ffc. 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/FR2X42160991.