thumb|right|190px|Malva sylvestris alt=Cheeseweed, Behbahan|thumb|Cheeseweed, Behbahan, Iran Malva is a genus of herbaceous or woody, annual, biennial, and perennial plants in the family Malvaceae.
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 0x3abeb0a9592c0fb0742dbaaa8688197d9abf8d3c155cae5f0cc0385c4575b4bf. 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/f7fa8870-bd37-40c2-b894-6bb82dafbeee.json and https://artists.proofprofile.net/proofs/artist/f7fa8870-bd37-40c2-b894-6bb82dafbeee.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 0x888ac5a20d34b465e35e6336f9d75c554e77972270ec2360d743ab5b2b3db390. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEF982253902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48c82d02b6fa99f3efb8d9dec5dd6d23a4e72f73b50934eab67c79f1123c296. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEF982253905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a58a7cfe6f01af416c7e46795d981dde7b1d3773a78ca8892eb3c8a52a3a5de. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEF982253908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff198f9fc28de7fd4798090dc43c845648528df392474705699f16c4153e3c46. 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/DEF982253910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb301d499bc26aa7dc64fb4387e83119beebf5a00a011d359e96482cda73d24a6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEF982455108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91a89201e348e4997a63c764ac6e2ea2ddd0493e44ec492932ac77c14e633d8. 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/DEF982455103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664662eaa2c51d0a8bc2f7391fe09f4c158b69f24aad61ba78ab60e08f702ff6. 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/DEF982455101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637ef6cf07193e6c5e073cc3a67d430a99beffe3d827aba7581eaef171569479. 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/DEF982455104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8595c3077cb8b072660e783ba284cb5cd4c33edb02aa32d7f986497a8fcadb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEF982455105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6c111b4b9b6c2696897efea4aba4a0fe7634fda35a60474e3e8fb37ff7f38. 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/DEF982455102.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038e4605550038cf5a8ca89a64aa94626b0a0eea1f21d1e3fad0cc06e598392a. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/DEF982455107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84ff316d924edbf8c1a63a273aa363bf256780c94ff55968541cb8514598ecf. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/DEF982455110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aab05b5bbef3a242df43130712c3eb2a68c5a4dd215e94f7b1b74a3cd1bb20. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEF982455112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229c40cffd476ba512bdad86659919b53bc2fdf3adfbf74106903931c908124f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEF982455113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee395f5cd86bd63d10d93803d306ba5431bad78c86d3d5704f3a38f728a0264. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEOL52300003.