The Gates was a site-specific work of art by Bulgarian artist Christo Yavacheff and French artist Jeanne-Claude, known jointly as Christo and Jeanne-Claude. The artists installed 7,503 steel "gates" a
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 0x8007ecbbc6b28eff1f72d04e9332ec9be0216984c17b400376502d0572a4a72f. 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/ef450b67-ffc9-4370-9e5b-4bbcd1ed85fc.json and https://artists.proofprofile.net/proofs/artist/ef450b67-ffc9-4370-9e5b-4bbcd1ed85fc.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 0x98845ca65ea64448c42f18fbea488d6357690e0b878f9c8d4c2a016a921c404a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEYW82200811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8164cf33c31dc95fa7ff15499f15ac2cda053b8d0821d17363eb0b4b4d9243be. 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/DEYW82200812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecffa06a835767dc2c0fd71199c0409ce8512893d27fa86b52686562ed43799. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEYW82200813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859503f1b3267b8c58a9abd7784afdc732c7fa96dd6fe8bf92f3c409a9f8db68. 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/DEYW82200814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd0904972ac1b9981e51cbc947f4763301b2971cb57762c3d0f7659a32f9ed4. 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/DEYW82200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713dfd002a36719784a8fa06dd988a9c4521893d635980102e1a75a0959df2a1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEYW82200816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160efdf8a4818d6a8479153ec1ba7dfdb329f2a11808ec377751fcdf2f242d3d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEYW82200817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88147777ee60cc777ae462af0b0abb94bc4b2f28ea19d1de239eea917949da3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEYW82200818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97205ac37b590c9bb01c3cd6e1416b0a07a14edae164d959993743da870b828. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEYW82203685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42760fc3794e057212f0bd491b6dc9b14e20e3da8b263cbb34499874664627a4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEYW82203686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614de4a16e8acd476474ea64d93265c1ff63d2081ba6b79b3e8bc5941a439034. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/DEYW82203687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562a366018a766bb39187837c4be26b1c33f42b42329f1e74ff601734fa73a7a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEYW82414216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f6f62000322792236911abfd2874e63eb986b74abe4def4f67495726e434d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEYW82414219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111a0899fdc10b123323ebb60c4749d6559e25533620b5ffc795ae0b0bffaa69. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEYW82414220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98556186ae98ec577afb7a492c0126991026ac9f9624a51dacf01521722aa039. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEYW82414221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1155c1d39bbb481f72f4583b38e64659cc2cd78e6c25746c87175206618c4a67. 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/DEYW82414222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af4504f8129b95331ead01228b0176e632efbcad098a196b207cc1f73ade0f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/DEYW82414223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b32cd8b93552e481ed0e18610e96263820a1db6641debc06cb82ce87a959b8. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEYW82414224.