Capper is a surname. Notable people with the surname include: Andy Capper (born 1973), English journalist Arthur Capper (1865–1951), American politician Charles Capper, American historian Charles Cap
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 0x25b6b82a5fc3ef5a217965fc21ea279ef537e14c936f31b689bbe990b2f524d1. 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/deae7378-37d2-47c7-b4e5-650ccd104a69.json and https://artists.proofprofile.net/proofs/artist/deae7378-37d2-47c7-b4e5-650ccd104a69.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 0xe57ea7e5aecdf66d664ced09f04fc3c4463e49d4f7d304057bbc8b4b6f5bb85a. 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/HKG732120282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63e295b90f8c3c006fce19554220449233a514bc1b2c393bfe339a47af65b1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:06:48Z), 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/DGA082406942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f613905c5fc1fd5a8402fd77802a6de072cde0f07a5a50de4b1c0438e3bb0b. 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/DGA082450872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439875fa095732fae1103f0cd5be05c12f1ab596f2e1f9fd80ada1dae7f7afa. 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/DGA082481123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8a7180b682be952a6fa93fff57fd866e644479b3cf5aedcadbff565edc8fe. 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/DGA082406943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82925c4a981121cf0e179dd9858f301c4469486e4f4c81312dfba7368fad08a3. 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/DGA082450873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc462c86200a80643dfeeaabba67a81943f3c7e45fa0351c87a5788e2202050a2. 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/DGA082481124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f28f2f4d650790edee0445d0795bd9e68bb02d3659ef5af2127bb9977e877. 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/DGA082406944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45a9166a763b5ee44024307d96fbc5736a9093ff9c9b0f70ee997be2babcf9. 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/DGA082450874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe8731331f5cec4de2f378a727e94a91aca69adefcafabd010ed3daf32865e0. 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/DGA082481125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ff943d3c2a916442430972038fd6ec50f958fa431e8fa89b743c5c1bfd70e8. 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/DGA082406945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6723f0aad5be700b59306fda23f2ad5c8c495f868d1178ee1ad6457eebe4fd8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA082450875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d74bd1a470d123819fc59fc275e5b17ceda4c1b6a29bb872657082024c86cf. 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/DGA082481126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5669af92d72ae5b42248bb5cb22cfd9b091370fdfef78f586a7284e660926806. 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/DGA082406946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03432a8c6647e9b3f84dc6d8765fb244d0a70df3288c2beab19c435b61b0d290. 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/DGA082450876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976aa4c622cb16533905080dac47fed54f1d1ff38db2596f8a9eeee62e27f623. 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/DGA082481127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1173312f9b9bdcdc3239abd3458a19f3201e7d4bf3a086fc52e6332039e082. 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/DGA082406947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd862477b8f0541defc6194c51786a8f44b655443de2d2a486ac19894fe79f2. 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/DGA082450877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3350e53d1350ff8b6c4ad8adf7bf43e94e48b08e675deae69d3b36939edd25e6. 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/DGA082481128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb1bc2c27215d7ee177839567cfbf5da30fbc25babb7141567b88b553a8757d. 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/DGA082406948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980dd9f864601c43de9fe9fa9fa67c6ec942ff838e1cbf281963bfd89e33e5bb. 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/DGA082450878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe67336a7e2d5171f0ab6d375a20b73ba969ff43a40bc3ee5a7b516b7861da5b. 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/DGA082406949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9b6fd4a5c91fb24aeb50584a015305b2d40a8b70c288ea6642c44b1efaeaa7. 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/DGA082406950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee04fe2809baa28feaab5a6649a65be84b145ca96b4b2759dee8d951decd58c. 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/TWAE32403305.