Orchestra Ethiopia was an Ethiopian concert band formed in 1963 by the Egyptian-born American composer and ethnomusicologist Halim El-Dabh. The group, which was founded in Addis Ababa, comprised up to
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 0x502d1866d4bf5114b0f71f7400c057a2a8e5b7408a6ce3524f7a6e34fe874ed1. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/161d40e3-a26f-4a70-9058-268b3d6390a5.json and https://artists.proofprofile.net/proofs/artist/161d40e3-a26f-4a70-9058-268b3d6390a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ethiopiques, Vol. 23: Orchestra Ethiopia 1963-1975
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 0x39e9e9f778472a41e4eb3e5ec3e27adf855b0c32087a51d72a4494372251bac1. 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/FRY396911702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3448e539fcfb94f83c6e9ce45fe7d703b003e6525b46248c061b55351b11d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRY396911703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c1f67fe730e442347eb99d5fd13f9c98699a6ecbe3f8c6a1907bb2ba7dbfd5. 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/FRY396911704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc36b1a2fa3c5e6c10975931377b025675162ecd39f3f6ba7101f547296437. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY396911705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f1b1d6d680f06271e44d30f2c141ea062f6403059f93bbb9adb8ec6c4e00d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRY396911706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a91b1b8481b826aa02aa35a4934fc97954c513eb88982ec8fd9b7388a68c34b. 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/FRY396911707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b58ff962b97a0b8818fbf4d45055b5c78caaeb13cb50d8109796b5810a1beb8. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRY396911708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6100735f008accbcee6ed0dec139b3ac45eb9578abc85944e2114b86ee4cc97a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRY396911709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dfe06b42b1488a860c09c99e6f9c3dc74a5dee62b6f0f3950cff421e658d43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRY396911710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be714d4d5657cf0c73a09ad5480619ed60170d0c746c665d95f4ba950d053cc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRY396911711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41380c05282754bf65657ce58bb1cc82f456131ee785381283d8e3719e4de209. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRY396911712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed3e2b72827658f7a55459efa8c9fffe7934b407303a639d46d75aba063f3af. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRY396911713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ded10da1e4c4b832e9c9bb376e4d295851c486d5b741aa74abb15105e2694. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY396911714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cff7620dbcec54127296bff68ab4e323da827ac15eee9d92f41175e623c6e3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY396911715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7164d56c0dd41133143ffa7163545792d1131826b1cc21447b10b6db432b8bb. 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/FRY396911716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a4e42c46adb80d1e1c538ccfc2bc3bfea61152fac2e5bee270890108a6ad0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY396911719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba2d5db6887e9430357d2e777f36778949949c32d99101633e1419b3e3577c4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRY396911720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce714bae64e1dbee0854d9de85e0957584ab3b7b9e3281a42d18d2cabb68e32. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY396911721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5994bf30ed1878522a577d2d47524ab415e1321efb3c2a3e7ffee8781b5c0cb7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRY396911722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3205ff824001169d6fff079e7c0cfb7b32c849d46ef534fcc5d690af5285a4c8. 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/FRY396911723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16b4e2d47eb432dabe4db57199390010b09930d1045a458003d3a9586f23f80. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRY396911724.