Costa may refer to: Biology Rib (Latin: costa), in vertebrate anatomy Costa (botany), the central strand of a plant leaf or thallus Costa (coral), a stony rib, part of the skeleton of a coral Cos
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 0x36b0a44bd69626ba6a73d38154fe590c005345badeeda16d5465e27774c203e4. 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/4b85d9f0-9dbc-45a6-842c-658d12a56218.json and https://artists.proofprofile.net/proofs/artist/4b85d9f0-9dbc-45a6-842c-658d12a56218.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 0x5e36ea14b6f4bfd58ff466642adfb7de88c56c14d70b519b6859e578d3bdf4e2. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/FR9W12248303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c87e19d119f72f0cf41fa86415792ecaf5019a65ca9f9610d406d6c96dc7919. 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/FR9W12410175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a47f326f44a740d93dd3557b7066b1002660b825b7e26c0103073de7e34889b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12425081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e301510750edd8e18077431bc601dbffebe7778301ce754cf97d99f4f4ba71. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR9W12450729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47d4a521685abd0394ceed8282066e191d83fa8782c2ea96d5e010b14c23834. 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/FR9W12455056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1a3629edba17b8c75431f4a38851d375d71ab960eef699c3fd96674ccd7de. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/FR9W12427771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee8641328a160e4944df2c8cb0bd62cfb0b6c0e9471bcb14b7a7d16a5bee34a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W12455968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2ad4e7613f4700914d2900430cd878e5956539856715f4b84fa9e8e9bb4de. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/FR9W12455961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf572790cbb36c543a35a8d8403ad9173dbe0c114019b7fa60d6b89dd923c0c6d. 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/FR9W12455962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d8458dbdf097da031e5db26f4f1cc00c4548d313ac2bac1ce65919092728c7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12455964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ffac7eed4caa52e5540372518b249e989b6db5d40745eadd6004c27042d12a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12455966.
Love is an Act of Courage (In Bloom 2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd539d8b564434ccd2380285bc72ffd43315531b1176f1f80c1904abe40f7c2. 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/NLD682401147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a99ebccdc62cc9f887ffeabb1ac46b87a8836bdc33c95dcf9ef093fda6eb38e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6542015608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d449bd1ff7ce746a89d2235aff8c75cbd08f8a1cf718a77d5985c14195363. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLCK42223593.