Kyoto ( or ; Japanese: , Kyōto ), officially , is the capital city of Kyoto Prefecture in the Kansai region of Japan's largest and most populous island of Honshu. , the city had a population of 1.46 m
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 0x3d69273b5c6fdacf4e04d1ec1a9fd7c4e9c01d746f01798e67652507d78d8291. 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/5733f00d-c0cd-42a4-9730-9ea8a137d1ac.json and https://artists.proofprofile.net/proofs/artist/5733f00d-c0cd-42a4-9730-9ea8a137d1ac.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 0x55511bdc21dec4a8942b87f1c58da4b6d0ef1c8306065e1aaf613874f4a8fae2. 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/QZTAX2393411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81090f271ef4b3bcea68917cb58729dba0b9eb0e1b96788ae07c3abcad7c6a0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAY2390515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99221afaa0c9237d233a5c1c79c8b860093f8c242937fcb34238c197d92b24f2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPEW2402906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcaf897007d5a4bf95801b4bc2d6a9b89db1f4c9e232605c6c86c100458a778. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB22385425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdbb2838d9acda3a0deaf5b2a26f97a7d77ed95b1d87ef82e82ecb138ad7884. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZPEW2400788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3fa63ed210c944fd87f5524fcbbceb7bf2d283a18efde15b385e912223905. 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/QZTB62309564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18319efc1902bb8b07aee23915f0c588ce78a2129a861207ae8297f9e1401d54. 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/QZTB72383111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5829f2c613edce36fa09669c7283cf869d88b7c0e0c0d77df98c5392183289c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBC2363297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4b080b0de0bf6dbebafa9f5da10725e2568acbf49136627b758e4b03b0ccc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZVEM2398989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2557011445ee13e92ebc774f5f8b33390798f2e75ffc30feb529653d20cc9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFQ2375604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b12d5c48340e1215bcb1ea6f13dd36a4f0e054af81b94119eca5c65a6c52df1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZEB2390032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f686ef29ced051dd77e0b7deb58f91b53e50a47b80303cec8a0e7a50f30de4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZVEM2399545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad979be8d34263f05ba909eabd70f3d89643dda137162d8d1c4ee72e708b3a04. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPEW2400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f3788da34310fc3bf85054602d50d4b55361ea8b116b1cf4ddedc3699f3b0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPEW2409038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527746ae560a9561c367fc5f886fdb9cabb0ccc3bc879dff493ff5f9afefbc1f. 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/QZPEW2409039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261454e54575437767e7dce2fb009e6e22e8c50e47e4c0a1cf23f5676c4e0fd4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPEW2414231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed0421867af9ee801da95e891406276059318dd9cda2ec77547e85e0bf15c0. 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/DEUD42426950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70058272db825198a2c8001df51b2cc061deed29bf5e16ca963d42c3ba07af90. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEUD42428112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f442d30d8eee5a7146a1a308d61567f3891d5750ae7b5cd8fd53dca3185cd9. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEUD42427720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c44224f775bc9ef7e276e367a111079d5fbc04bab19aaa19021e7bfeaa91fe. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEUD42434238.