thumb|right|Tulipa alberti in Kazakhstan thumb Tulips are spring-blooming perennial herbaceous bulbiferous geophytes in the Tulipa genus. Their flowers are usually large, showy, and brightly coloured,
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 0xace131f6044b3b33971058d63eaedc21fa4f07b2ac80af5f38f2a6a7be21bc78. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4acdcee5-eebd-4f7b-a6aa-831db007c20b.json and https://artists.proofprofile.net/proofs/artist/4acdcee5-eebd-4f7b-a6aa-831db007c20b.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 0x9e8f1fa68ea79b20a3d1da764b31550a9e4bcd1c7a386edbf7632fb00fcbed57. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM91898177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f20d8df184fd4635fbaa44be2ed94a26dbd2c87328c3c43710c6cdf3aaf99d. 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/USCGJ2019292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f87be24ae5a9bbe55ae0ee2e0ed2fb30a7d0290e8c3c6cd1dda1c82f9082854. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USHM22115481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509e19220e8d907e0460388a11a4abdb50738933845f1e2c67ed1c9d8fba3d9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM22310499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ac4299d2d0162c4c8bb888630ad8b092b4bc4d12d9bb98e610ce410685cc91. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USHM22310501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a74f49e8b998ce5f05d62a5e326e74ae4ba5f36c757fe53147baa7564a21d. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USHM22310502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0760d5dfb1e9af99b50ea5992e686fcd8a4852f21c93bc8cf9f13023a1ac6ccb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM22310503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16289c4eb35d1f1a32c33f6e6aac2dbbf6b4df5bca55bb7bc21b1a5952577c0a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/USL4Q2345087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4519523a8e0b3ce1774ff450f7c823ebad3a8ed18024f47b75041b2a6ff63926. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USX9P2311626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8b408f89a0dce8cfd72acce4a6b335257ddfcacdf50f8cc1c1879e56eae10. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM22419420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bd2ca08bd621ee6460db5a16a4302dc6506361524edf39e28a4205441463ef. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QT3TB2415750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710effccd5e804685474dd3cb672fe8bc35e3f2d36486a7b39255b68ef119c88. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3TB2415752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508d5f4e238912f7fad607c6c9308351f15dcc4d3a0bad05bc31e6519a83b65. 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/QT3TB2415754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740401afe1d58de963e11cf9e38425f3a9760065583d7111a064952bb7efc4c1. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/QT3TB2415755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ca5daab0004a3e7b1ffd312413e13ff95e75042109098f3687aec39a21365. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3TB2415756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a908215d19e337771dbdc5f38065284a2311b697ac42b6c3a9d7010645273e3. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QT3TB2415758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dc8207c66a8b1626f79cbae93d90204e40654df097d7add788f67fa7b89fde. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QT3TB2415759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6058cfa5e658866f9de3914db4db79c4b200bd601f0c86b46e684bc951c4199. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEKB72535716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679e0f07ffa105ab0272bb7e715a08779f84455f7124fb40ecf96faf51409d8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEKB72541872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0005c3760c55b8afb4070c078e10637d0d477a44e557f0354a91eed73a4d20f. 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/DEKB72544753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b85e56cddf3be08f61c0edca29ebc299cc137b361f6008a8bd2af0dec1d87e. 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/DEKB72548518.