thumb|The court of the Durrani Emirate of Afghanistan (James Rattray, 1839) Emir (; (), also transliterated as amir, is a word of Arabic origin that can refer to a male monarch, aristocrat, holder
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 0x4946718e0f36c0cb49803d3810b0a0fbe601386db9f6b5efac7500adcdd2ed25. 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/95040cdd-4262-4b9d-943d-9945ceb3da85.json and https://artists.proofprofile.net/proofs/artist/95040cdd-4262-4b9d-943d-9945ceb3da85.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bi' Ağla (Ceyhun Çelikten Versiyon) - Ceyhun Celikten Versiyon
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 0x191a226d076ec5db27e18b35d8ddc5af1e27f59967d082acd3e5399660130db6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRA161400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf181860e7217c334e8d5b5031cc696f171a027c44e1c416a555bdb519e674dea. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TRA161700466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8a56ca1236c6b8f0a7a98e3616cdb03bbf0f122afdff37b54805db79f1548. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TRA161800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259c257e2442eb747444fcdc9ea57901e5d51f90e51fb249bce36d7986e4f12c. 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/TRAOJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cd567108d629059bde1f5d2603fab23c75a094eac2fa252ed46b3e9208d526. 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/TRAOJ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb9c08a9683202a339f08be1dfd0d7b8a64bd5915a31b4dfa3dab93eeb68954. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TRA161900379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9b26da96dba9a391b30c6b628020b5602ef3e50efddeed724efd711927bb80. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/TRA162000397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a73f41cb8ca7c0137727810cca4f4d31683c8c4259e88726f3f8dc531a8b12. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TRA162100438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812323c3aaf6a79c0203bf32f53bd83a0d5ee15b0f472e39b9e5b6f392df118. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TRA162200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa940eaa8fe257917949422f34d08282181eb454b49bebb54c4834e4e98dedbe7. 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/TRA162300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f1ac0513bdb96f54eeba195c379619fc496538270ada919046efeba08ddc79. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TR0012300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882a5ad090bf26a4420bb24ca10e43719df90cbc337e9c8feefe1f0cfdf61c74. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TR0012400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ec1d3b63d1c327b88a4bca1e42fb09811076147a8c88c32d41a7410b8db07b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TR0130600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d38e8b21850e591eb933be314b182de6bd2a6ffbd8773657fc3babfea3f5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM2PV1692885.