A cactus (: cacti, cactuses, or less commonly, cactus) is a member of the plant family Cactaceae (), a family of the order Caryophyllales comprising about 127 genera with some 1,750 known species. The
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c2a62fd02fa7fc2a094eabf0f8c566ed16b7c96b9864813b52b5b47c8ba948. 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/6359441b-1464-4b9b-8628-70bd7045b141.json and https://artists.proofprofile.net/proofs/artist/6359441b-1464-4b9b-8628-70bd7045b141.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2288859fc1a28caa2893004e1a62c7e56eb65385798ab9bd5a09fda645fe445c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IT8IP2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b31247b64ecf6c695077354da5fbc3a30b9aacc18d480743a2beaeab18b5f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IT8IP2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f049e4de65a041c07521be21360e787f29aba40a935302cf8ce307f15aee26. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/IT8IP2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a17997f6fb1ecd9018fedaa51fd8f06f8d71837d456f18a5c7fa8a92737a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IT8IP2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9831f5faeccff7bc604888235a669585fcd67b6ff587e105967646090b0090. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IT8IP2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8433855c68901d6e92e28fef4160825a1121c95468c3943c8a21f7fc312bb6f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/IT6KZ2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff02dbd6c2bd8c84aa1b27612856a5ec7e3e4c7d111c7c9f54c86c4bc5ae464a. 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/IT6KZ2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6da8efdac86865447a4eadf9e6f32b5c02384b5eece116321c1f633efc5c1c. 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/IT6KZ2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0807d40adda80b7bba62975afc53a2db80548aa13bce5830e5b17493ba02b361. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFME2350769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19a8ace9aa9e44cd37148d7ebee8cfab081735691991fc54485433974a88f8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMFMF2397038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1241a97489046a224b786a17e2e321b79e1c92d481c025831fafe7f579ff248c. 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/QM7282413861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86d62ce08ea69dd7e6be839a2f36fcb434a1044d648bc5471199b29191cec28. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6N22409753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c70a2bf8de347c21f44afadbc9818b994a4ecd462a4ba2996e51718cc2dfb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM4TW2451455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19a8ace9aa9e44cd37148d7ebee8cfab081735691991fc54485433974a88f8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMFMF2397038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb6826a5d84eca929ea0cbe8dad520315695e1e4e3f1d748a1e8181b258da3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6MZ2429571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef9f74473c0afa8e60c193b83ceebb3caa454f00ebf4e09f176e8f1f7b83c1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA72456165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b52304479571fb966c3419472c0b0925e7cd58a60526d2fafb71a6cb1ee47bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US38Y2545159.