Dobrinka Tabakova (Bulgarian: Добринка Табакова; born 1980, Plovdiv, Bulgaria) is a Bulgarian-British composer. Early life and education Dobrinka Tabakova was born in Plovdiv, Bulgaria, to medical ph
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 0xc05e17d36a0f2fab256fcd51ad38933cd2068c7131c9834c797aace015684814. 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/79981e78-b374-4968-9cd6-ddaf0cb93ea7.json and https://artists.proofprofile.net/proofs/artist/79981e78-b374-4968-9cd6-ddaf0cb93ea7.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 0x06fb18f0af7287394ab9105822133641591bcfcda2754abc532a27b5397d0261. 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/GBEJP2319503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80346afcefb5e45835ad8425d9363360b092a0bc8d7dca3772a0faa22a22badf. 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/GBEJP2319506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efb040b921578a24dc930df9a9ff770ef52f0a187cb919ee54da632cd718e4b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEN962102920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a39d22d26df0afc3d1587a4d47830a5a853e50142993f554882df9020c2bb. 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/DEN962200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e86a23c8dbb92b9e9e43cc8a4b685aa00c515a35e631c9beb49fb50bd098c. 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/DEN962200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512bfa2250dd93b6cf55210a82e7e6ad93126503b270226ed4c7e701f0cb51c5. 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/DEN962102950.
O vis eternitatis (Arr. Tormod Tvete Vik for Solo Violin and Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270fa875b1e928cf4ef9bd22e7fb7c1e60cb9f8a9682381ddec576af20d6506b. 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/DEN962102960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554dfe9e4710c9f6ecc2504849068af85337b56b4d6c5468909876b3f17d7786. 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/DEN962102970.
24 Preludes for Violin and Piano, Op. 46: No. 15 Adagio sognando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178e96c34ddfbf29dddaa9322f107763e46a4d0a162e61d823ab0e49acabc193. 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/DEN962102980.
Bær (Arr. Knoth for Solo Violin and Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fe9d4c019d21629625ede9be2037308be9f213505a42119fcccd99dfd3df44. 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/DEN962102990.
Reverie (Arr. Knoth for Solo Violin, Strings and Electronics)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dc47c0e91ff77de9af297103a98c42dad7c0844d74c7523b78954586adde31. 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/DEN962103000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b569895f4c7dfb8d0a91ccc855d61a65a7de4250fc0a03acabce8afbf6700. 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/DEN962103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270c0c43b981b4daf9bc47f94fc350d7d041a785f8fc26f95298f70545a8c18. 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/DEN962103020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599291222c2b04007b5f4628fa5d6c02f6a704b977a9f79f9aaba9490fc5c7ce. 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/DEN962102940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7bdd6aa5caef635e869174affd700ecc7b00a969b333e3818bb01185d70549. 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/DEB331123901.
Concerto For Violoncello And Strings: I. (Turbulent, Tense)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06c223a7167218d86755cea0765b679838f0f39c9f0359fbe5625e8ec50efb8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB331123902.
Concerto For Violoncello And Strings: II. (Longing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b669fee06dee1a9eb91207ce15cffd8e55a51234c21f857c56eceb73ee63533. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEB331123903.
Concerto For Violoncello And Strings: III. (Radiant)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b196ef2443b5a1eec0d40d71e82825f6d7fa3600007e2689bf4b8a0842291. 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/DEB331123904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f263320a495d7e1d36ca79142193672e73bbf02b61f0fa58cd16d23fc7d074c. 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/DEB331123905.
Suite In Old Style: II. The Rose Garden, By Moonlight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21bb4598e4d5167fe6fb127366e1880988e602775a6f919c7265b1bf8fdb36a. 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/DEB331123907.
Tabakova: Concerto for Viola and Strings: Light
Tabakova: Concerto for Cello and Strings: Longing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c91356780a110c82e1e662b558ab0ec1fdcea771f83c097520e2387b23037a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USL4R2135812.
Dobrinka Tabakova: Kynance Cove, on the South Downs and Works for Choir
Frühlingsglaube, D. 686 (Arr. for Piano by August Horn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bfa00cb2712796079489b256528662cf3611cf80ac9fe29d7567cc95b402e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLE422301807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5203ad436a0dbb33116bdabc7922239d6a44afc3f0517411034c5ba1e7699fef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLE422301823.
Horse Race (Arr. for Orchestra by Tom Yang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bbafaa37cfbbd2494be41337d5daa37db79329072c5c174f29eef54015efa5. 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/GBYDS2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ba21001bcb5474460a94b88318b043b4ba93f48501ea3848c04fcb9f0185e. 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/GBYDS2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a71ce7c94961875611b9461de03e9f9cda330c4d6c52876ee6a4c8b1e285403. 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/GBEBL1414403.
Brahms, Bridge, Enescu, Franck, Glinka & Tabakova: Works for Viola and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4845307039a0c3a32d5209c958f593ef86f261ca7b4fd01c64873381f58653. 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/HKI192400701.