Costadinos Contostavlos (Greek: Κωνσταντίνος Κοντόσταυλος; born 11 June 1987), better known by his stage name Dappy, is an English rapper, singer, songwriter and actor. He is the lead singer of the Ca
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 0xb860b9600fad62d6a0201cf383a80500e3f05bc5f2d0f53e5f7a7631b5d0d8a5. 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/9c25d139-ac75-4f60-bb46-7e69e03f332a.json and https://artists.proofprofile.net/proofs/artist/9c25d139-ac75-4f60-bb46-7e69e03f332a.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 0x6614a50a7789b4f12c3a07e1d11578b1f6f94bfce976c2c8546bc97d7572192b. 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/GBARL1900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ae9c780997032f75cf82fdc962b45b90cde12b7d20a9d3aeeb153c45b8385. 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/GB23J1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bed170ecd92068f190f00a69a81bf2a4c2f208a52f3fdf8f564bd3886368250. 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/GBMA22098218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6cf19b8645c4ca51a9069cf9e3d74237fb1d07cc34d3a4d4f463550a020a20. 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/GBAYE2200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618c17652eaafb4ac907bf073d2d5c0eb02c8a1eaebdb89e6936185da5f35a1d. 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/GBARL1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618c17652eaafb4ac907bf073d2d5c0eb02c8a1eaebdb89e6936185da5f35a1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBARL1900030.
Link Up - Geko x Stefflon Don x Deno x Dappy
Link Up (Geko x Stefflon Don x Deno x Dappy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d068ebb186e7d332bab01fc731d89e1ca626b03b9b8c4ff170c33f11cdb06c. 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/GBSXS1900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d068ebb186e7d332bab01fc731d89e1ca626b03b9b8c4ff170c33f11cdb06c. 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/GBSXS1900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fab81312c6099627a88d871cdb962d4bbc2525583017078d3b91879dcbfbdd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZZOPM2003961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa2000fba1afde2c13fa8b2a9e3068cde6ee7bcf381ae5f6851a2dac0dfa6df. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZZOPM2105263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbbe49c27611a3f3f6976b7d3fa1b47042dfd64997217ceee90e8ef874794b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBARL2000636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb05da5776e31529548815617a7587c4e522c895883966c5add3dcc256a78bf0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZZOPM2105269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa2000fba1afde2c13fa8b2a9e3068cde6ee7bcf381ae5f6851a2dac0dfa6df. 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/ZZOPM2105263.