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 0x9ae876a5451bb3301d9e4784099be400babc1eed2501a07ab87260a8478ebbde. 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/3803c53c-9ab5-4442-aa56-55c7e5910465.json and https://artists.proofprofile.net/proofs/artist/3803c53c-9ab5-4442-aa56-55c7e5910465.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
يوسف شافي - (اعاهدك باللي فرض حجة البيت)
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 0xc30a9f4d13d736f6fe5db76ffb594af91f8c97443e1320cf195bd67730c85764. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7X2482242 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be01d9fd95345e7d8e17a84bba912eed47d60d4f774d17cd45bb7580d2c66c1. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7X2480005 — a six-check JSON result.
يوسف شافي - يا ناشداً عقب البطى كيف الأحوال
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56d03835c518191c4d751cb45f697448f9ea566322729cf5f7513043223e044. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EZ2455603 — a six-check JSON result.
يوسف شافي - (نعم لا انتي ولا غيرك يعيش بدينيتي يطمع)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d2f5face61cedb202cb524eb2dbbfa0fab814cecc749f7bc2daf5cd75846b1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22413410 — a six-check JSON result.
يوسف شافي- (أهداءه الى الفنان خالدعبدالرحمن)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9222c024679592fc7d5449680defdbeae0caa4cf76ea1daa2a73fbc91747d0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22405239 — a six-check JSON result.
يوسف شافي - وين انت ياللي عليك الشوق يوديني
يوسف شافي - وش صار يالي نويت اليوم هجراني
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44886ce2382a07e51c8fba252dad506a95a71ff5e139cb50cbe0f79ca4cec3a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22409107 — a six-check JSON result.
يوسف شافي - مرثية (جاني خبر موته وضاقت بي الدار)
يوسف شافي - ليتك بنفسك عانيت وقلتلي عذريك
يوسف شافي - (ممداك تنسى جرحتة القلب في صدك)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcced92929443299b04cdc164ccf4995f39c6a0adb7d762f3a215bd79dfc64c84. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22409078 — a six-check JSON result.