An exhibition, in the most general sense, is an organized presentation and display of a selection of items. In practice, exhibitions usually occur within a cultural or educational setting such as a mu
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 0xf27e6dd01c1afb5ea306335895237d07f3f81831ce807f203140ccca74e221a7. 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/2bd23b40-a29a-4de5-a3f2-7b5c87a19c53.json and https://artists.proofprofile.net/proofs/artist/2bd23b40-a29a-4de5-a3f2-7b5c87a19c53.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 0x1ff449ab71a010921952c88c49ff8e1051f36c9da166dd8034a58dadbd976e2c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/KRA340902457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5c28b1f9ec41a7fb4d3fc6869a536788e2e7f012227f5fa7e32920508b0fbf. 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/KRA340902459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2dd88c1abf81a1c9ee27953586a551e12706b24eb66616789d22f9cf92f4ee. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/KRA340902460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab5dc213bade292c4be74cc0312ffe91b856b16e542012c376b6fad09f4b262. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRA340902461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a12e3074fce3a05b7bf848c3f579d5388eba318fa9c44e38c3d6fe85df24c69. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/KRA340902463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972bdddc1c673e4d46fca0ed1914c88acfd8fee1cf4748b29d33bc5693dfd6e6. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/KRA340902464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c6309ae78f0c6b2b346f613e4a03da0591ca620d0d5b675901ece3080b8bd3. 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/KRA340902465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097d4b56f310b6abef3f5021fe4265fe7bdb481c2a37bfda6df5a6b43559edc. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRA340902467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dacc7820724bf59266d4cb576ad6ee7a5e18c49a3e133cec44e8917e73cf1e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/KRA340902468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf395efc996a9fbd231fe7f27d4560d65e445e1429961e74666e47efc4ef9a4. 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/KRA340902469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f36019d90c2afa1465655a66df0cdb379ffca5b9aab0c87dcc1c58d60634b15. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRA340902470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee65244c44262e531f9ccba096dbea9e94ddcf4612b00118d9a55385fb29051a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/KRA340902471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2758b1622f8b2913654f0d7a9900ce40de9695a85f00ad2ae3bab59329c4ebb7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/KRA340902473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3d785b866411db21c5409d0b1dbab3b8d51f1aef8aea4004b46ed7622cdffc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRA340902474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3febc86179a8d1ad927106cb8855de226c3bf3f6bf3628d732394e0f69edf3e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZEKE1860079.