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 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 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 0x93cf6d69a965055f3b6b74c97aec4b67e24a06881aaf505f1110e4bc22ff3291. 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/FR50X2287804.
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 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/FR50X2287814.
Concerto Movement for Horn in E-Flat Major, K. 370b
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987e023122813b315a7f238a8408436e847be230a9c058690cdf60e48786d0e5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:58:53Z), 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/FR50X2057801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b4ad8abae00e7745a68aaa3e9e54874a643971718bc7c6a22f9a45ecf4b563. 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/FR50X2057802.
Sarahnade mambo (Based on Eine Kleine Nachtmusik by W. A. Mozart, K. 525)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ff7c9b3387dcbe7dc83e3698dc30422828c917d079ee9b54e29eb65a710db8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR50X2057804.
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 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 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.