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 0x215d9a400cd4b228943cdebd1e559967ef5205e153eec3d8bb55398e1860f321. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8547803c-e9e9-4c4e-8503-85cb63a08bc6.json and https://artists.proofprofile.net/proofs/artist/8547803c-e9e9-4c4e-8503-85cb63a08bc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
4 Gesänge, Op. 2 (Arr. for Baritone and Chamber Orchestra by Henk de Vlieger): No. 2, Schlafend trägt man mich in mein Heimatland - Live in Rotterdam
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 0x477e7e3e7da8e4e2a1e1ba6ce242b22b016f844e6e31585e07b943b66d90b591. 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/FR50X2187209.
Keyboard Concerto in D Minor, BWV 974 (After A. Marcello's S.Z799) [Arr. J. van Rijen]: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14f29e5d6f214f0701ae0dfc9c7f977c1d61b75fedbbfc1dd68780d46d0d1f1. 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/SEAEY1816030.
7 Frühe Lieder (Arr. for Soprano and Chamber Orchestra by Reinbert de Leeuw): No. 2, Schilflield - Live in Rotterdam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8184265b01a646012c52cd60d76408c5da3daa0f741eb4e287aff28cb5e7443. 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/FR50X2187202.
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
7 Frühe Lieder (Arr. for Soprano and Chamber Orchestra by Reinbert de Leeuw): No. 5, Im Zimmer - Live in Rotterdam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2094989af60d7764349c393e8a3be16710af3155a6756c83602d93838847cb83. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR50X2187205.
Fratres (Arr. for Trombone, String Ensemble & Percussion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d41bbcc27105fbd7cc728d1519cd759dd38a6f615d5551a4c1ca5c0574ed52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEAEY1816010.
Keyboard Concerto in D Minor, BWV 974 (After A. Marcello's S.Z799) [Arr. J. van Rijen]: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6b7b3ec1d7d5079222270d90bb706d7c6a6ba35d0e1e4b28daa2d9eb013430. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SEAEY1816020.
Keyboard Concerto in D Minor, BWV 974 (After A. Marcello's S.Z799) [Arr. J. van Rijen]: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd15e6347547d0ec2d30127e7f1c24e45211cfd2e680c4aa714cc7041d1a8b5b. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/SEAEY1816040.