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 0x749f0e7888f8806da80d683f3be18006c8a25dd1c1032e5310e8809b8f5878b9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/741eeea9-4b84-49d6-be98-6e0fcc38ecb9.json and https://artists.proofprofile.net/proofs/artist/741eeea9-4b84-49d6-be98-6e0fcc38ecb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dussek / Wagenseil / Krumpholtz: Harp Concertos
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 0x8628777bf2af6e5e5a6975edb7d451403b8c02953422cddf4028a84ba4caf1e6. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/HKI199601601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dd4415d4b98912a671bb45eda11ff51a30ca18b9a2fe01523c2e04769db5bd. 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/HKI199601602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710bdd150a51080c6c7cfba6d1b02a2d8cedbf7b29f882608031d9a47d858227. 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/HKI199601603.
Harp Concerto No. 6, Op. 9: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ac7a9a9c845ae0d15df6dc179ddc8ff1a7d1aedd1c20a7c16d8716704e5e4d. 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/HKI199601604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e66e2fcfe2e956e69f79297a752919ffa68cc3f51c1fd56205896556769d31. 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/HKI199601605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3f56f69f99e391d66c901ee86d5414f27bb603b77e2dc781876e515dea71a0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199601606.
Harp Sonata No. 2 in B-Flat Major, Op. 34: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c775805de6ec54e6723ea10d2870de1037a10a4aa7b566c86e6e1434db59e0. 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/HKI199601607.
Harp Sonata No. 2 in B-Flat Major, Op. 34: II. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ad50dca2010f024c57a30e90bb496e705469b39f297fbe8fd59e6050fc4c3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKI199601608.
Harp Concerto in E-Flat Major, Op. 15: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73965842b68ef950c848ca6bc835aa1f047be3600d99a0a8dc58818dffa6f5be. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI199601609.
Harp Concerto in E-Flat Major, Op. 15: III. Rondo: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f9f35dd78461823da75493b57d64bb6c7a9816425918c7976a8bc0a3628a9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI199601611.
Finesse: French Music for Harp and Violin (Arr. for Harp and Violin)