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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9477515a5b18ba5d1e146a4719689693707d4e3538d5e5d69d5dd2d2a5a1eda3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/955f14c8-f2aa-4879-b27c-8112d44f62a7.json and https://artists.proofprofile.net/proofs/artist/955f14c8-f2aa-4879-b27c-8112d44f62a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cuban Dances for Solo Horn, Strings and Percussion: No. 1, Tamarindo Scherz-son
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cf6d69a965055f3b6b74c97aec4b67e24a06881aaf505f1110e4bc22ff3291. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR50X2287804.
Horn Concerto No. 1 in D Major, K. 412/386b: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58815ab6a145be0fc6d5325a5e32e2a40a732dfa171bedbf64eda80151e6a2a. 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/FR50X2287810.
El Bodeguero (Arr. for Horn and Orchestra by Jorge Aragón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3588389fb8e8f1d9be31c23c4eeae9d44c57a47022488a25c09b0135e6a27fd. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FR50X2287813.
Pa Pa Pa (Inspired by the Papageno/Papagena Duet from W.A. Mozart’s The Magic Flute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8c0739d4877b216fd27789de2b18d0aa0f8e3c69ad25c9fca0542d87d121ea. 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/FR50X2287814.
Cuban Dances for Solo Horn, Strings and Percussion: No. 4, Un Bolero para Sarah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf892b90d57f2d012f9107d840b45c58187e2affc6f3ab8c7a83f4537cc400ce5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR50X2287807.
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 0x96b4ad8abae00e7745a68aaa3e9e54874a643971718bc7c6a22f9a45ecf4b563. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR50X2057802.
Horn Concerto in E-Flat Major, K. 447: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f47a6705fe0ca9a4387a4fa6d7fdd4fc539fa660f202697cbfab86dec1c19c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR50X2057805.
Rondo alla Mambo (Inspired by the Third Movement of W. A. Mozart's Horn Concerto, K. 447)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a5c5e40dabd83b4936239aa49c2367f670b9c444825dceeb85c486994efba1. 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/FR50X2057808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6af3d22e8acc7effc60c72025ebd60c5691a8976048eaabf774de2b587956d. 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/FR50X2057810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9179461bc4d00d25e936db70950c3a41fa9c4a3ce9e6805292b8b8df99d7eeeb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:42:35Z), 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/FR50X2057809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec821a25e311331e564346366e155d2488056e18c3f0e0922791b9bf10fd08e. 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/USA560534622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c2b23bcc7f546644785b2572d07c13fb2782adfae451d258dc181c4aa94405. 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/USA560534625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4b90f7c57b37a1a4777a77279c40d7bae4d5b4a79e111b256ae1a4fe149d25. 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/USA560534626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a0b9fed6fd49416e9e28a659e0d40dc7e7ae283554b62ecce86d1b3399f8ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560534627.