Hamza El Din (Arabic حمزة علاء الدين) (July 10, 1929 – May 22, 2006) was an Egyptian Nubian composer, oud player, tar player, and vocalist. He was born in southern Egypt and was an internationally kno
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 0x64778370786fbb9b82516a3cce3767a125309b45a18dd719795efc4337c3835b. 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/8fcda43e-d8d9-4669-90ed-9c4e2e382f11.json and https://artists.proofprofile.net/proofs/artist/8fcda43e-d8d9-4669-90ed-9c4e2e382f11.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 0xa4e9683420fa5e15a7dbb41db860bac29f0ae9afa1c32d0edb803d6d6a9c9246. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USVG29451806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60ddae953400ba224c09c7ec817a4cd83ffa6a98cbfb66b44d0af76959e6df7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USVG29451807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b41a78749c47e8f95a15cce411aee320ff2bcf80ca5dae71ce743faaa0076c0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USVG29451808.
Explorer Series: Escalay (The Water Wheel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431aac5411b2f1ad6ff53058f62a0b9266e64a128fab63a130dc1bd2014f1dd0. 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/USSF11000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d0ff0e18e8a76f8518cc0de031093804b7a4836603fd1abc8c1742996cf62d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USSF11000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa128b4c7070000eef7c9e606fe26be37c2a9705a4a78274248c5eed704c20e4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USSF11000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f7cfc67520b48324c16f985c12613b6d7368299771709ce25cf72fe72a4fd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US2BB9900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1eab040c0de0da3bf5771e9172b18326306980b48a53fad867b95ae20ebeaf. 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/US2BB9900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc70eb8976aa3a147b4ec9021e57407c26a1ad8897c90fef6b8665627a331758. 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/US2BB9900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cdeffd4772cd92673d922c224e0837c1ffc6aca7136a67508520d411ae1198. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US2BB9900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e39045ab2e065b1b3ab1fe08ea1273ff6ff569a9572ec4260e0e143707cdd1b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US2BB9900343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2696d806e6a47e179b4d38b139d93a7bdd1401439d12e4c86683bb3cae7cbc8. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USVG29150872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a65a9ed69e6b74948b768db6bb333f5a72f7860935dc6d5bc9356a29f99f1de. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USVG29150873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a86ded2b176fd02fca72c17584814eee3f76f308e04cc182a3cb81a1f24558. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USNO19227505.
Babel - Music From And Inspired By The Motion Picture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118352c50616e0ef06a1d388f5a3abe9e05b2b43fea273a16d51efb80b8eabd8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USC4R0614187.