Shafika or Shafika Al-Tantawiya () (1957 – 5 May 2011) was an Egyptian singer. She was nicknamed the "Umm Kulthum of popular songs". Her cassette tapes in the 1990s reportedly achieved the highest sal
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 0x9cbaaeba08fbf73b3fc9012ed7ca5080fbcaa306e1134163674e0064dc43b87f. 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/145b0afd-f286-46e4-9298-7a19466aae1e.json and https://artists.proofprofile.net/proofs/artist/145b0afd-f286-46e4-9298-7a19466aae1e.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 0x118ee91cf531acb4813638c959565ef123f3e29c4d11c3446300a9ec226166fc. 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/EGA181416766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80eac2a1fb2fb1e3b3e58b9295b81646db309a954a6eabbf74e4c4aae097dd. 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/EGA181401047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8666afa346f34c0f5016bcddea39f4282f7082cbe2830ecf1374a359d32bd2f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/EGA181401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68846fd29e17f54897b3c96d75fe70d208f06d38b8aea045ab2565ab383e71d6. 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/EGA181404619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03c00271343d93c8176fc2b7d44387d9fcf88363e0e4749a0aea2316a07171c. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/EGA181401054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745695d0c352f50e54f7ae6190ac0a2925c34ef4300cd9843ae1bf7c61286cd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/EGA181416765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a8dc76c47ef8a108d0ba011685d548c0110a4764e60a6a2e81cf4eefeee443. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA181401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f566996d31e36c5b8dff5bc5bd4777e29dea783316b192e80d341e699e9d7cb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/EGA181417387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947f93717ed57d77ff57cb2997338e9f45bd3adde931edf941c084c9c392e936. 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/EGA181417392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3e4bf3a53352d61997e0cc2c3a62745de11bdd242a75eb514710ed4935b73d. 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/EGA181425652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194908df6d513b653aa4aeee6f761d047a0371929b1fdea26c01762e8f54cfda. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX202551563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7407e29c347c5f2647b6b1803654668b202246929debb15bf54871ce5335e8e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DGA0T2415519.