DaCosta may refer to: People António Dacosta (1914–1990), Portuguese painter and poet Morton DaCosta (1914–1989), American theatre and film director, film producer, writer, and actor Nia DaCosta (bor
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 0xc1a6f7fbe2550885e0c7bfd1b495a168c0d74d01e26009311b5f4f129f3ac5a3. 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/6ed46722-1a0e-4450-ab29-90a214857ce0.json and https://artists.proofprofile.net/proofs/artist/6ed46722-1a0e-4450-ab29-90a214857ce0.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 0xfaa184be9028804cac3e51aa19205df60e3df96484c7753dcbecb1dc30613b15. 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/SE3GO1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb114e8705ecc1d5d474923ee36c0503b97d308b6038cb08ca6079d5729877b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SE3GO1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb605dbb76f49b0946b82d058ecde3c1f7afe0749441fd503e3d82572157e3e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE3GO1300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea8c3dba66ab719945495f36ad1af6b007b717afc40976aeea4f75b3291524b. 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/SE3GO1300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f35205e85bc51dd4a0eb164c6e21e3cdfc3de10d6c09e80a59a9560a24cc1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE3GO1300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df4aed2c74d395539160376ce255fb4dacd1734b9bbb2d07604597295b65c2. 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/SE3GO1200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340eb923958b130ae337a8a2636264c4301797967618201d7a53b063c48bc4eb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE3GO1200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c3cb9771b624e654343b84bbee47b1217f7bfbc1612e8a60176ea467607681. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE3GO1300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3cc11e04962bc30c81380e5ebb134d4db8e5bd512bd0ba08c973ae04735931. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE3GO1300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4fcc68dc64233eda18650483f2d5805a725ad5efb713cb2a7764459f4f1dc3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SEVJH1708701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402f25800c1810309040adbbed91bfa950197d99a9171d5622c5c48b3e5de92f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE6A91908303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1834c8595b674daa4123874dda8e7e2a942fcee2be8960c96505da698a7e73d. 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/SEYOK1420546.
Hemmaplan (feat. Alpis, DaCosta & DC Grimsta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849edf566a5d54fb3309aa499fbdc59b3083903d69efd8840d902e119b6f0ee3. 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/SEYOK1301365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46d321bcf1da2b28664223512e9302efeceaafb62de29634c28ccf5c91d0bba. 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/SEXVP1420102.