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 0x0aa72acbb80ef4ac206f26105c6ed200d3985f2c129c3ef0c6696318d892a8b9. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/800dcece-33cc-4ba0-a5eb-69480c9fb5d7.json and https://artists.proofprofile.net/proofs/artist/800dcece-33cc-4ba0-a5eb-69480c9fb5d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 2: III. In ruhig fliessender Bewergung
Janáček: Glagolitic Mass: III. Kyrie (1927 Version)
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 0xcb2b8b047a8775773f36cb55d289e169796f529d45e757d2b8d650e1c6650664. 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/GBPFW2200003.
Janáček: Glagolitic Mass: VII. Agnus Dei (1927 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a9717c98b2a9b48f7c380e5f757617695082b5dafd4f13d63904b5db34d08. 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/GBPFW2200007.
Janáček: Glagolitic Mass: VI. Sanctus (1927 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47549a5a7a4232a2bc8d900afe11917362d4fe21c256a602d32949a79b42bd97. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBPFW2200006.
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
Frances-Hoad: You Promised Me Everything
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e435615e0ecc6c4a1baf62aa0ffad0985841a07db2990565a336e3be85e195. 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/USHM11565401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a118bba9aab15f91d01dc09803641838b73810d7de2c465aa739e8677819b5. 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/USHM11565402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ddef3ca0717c4f387c29d820fd67cd8875146243a4663fee3d5d0bb69578c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USHM11565403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0792fcc7d91a5cc21f58f4e3c22e64b7a3f47d85f606d2fa062bd39592ddc61. 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/USHM11565407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf191c8db54e7ea37d1c891949b9c4f15228d23ef2c2e86f313e2dbc758bce10a. 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/USHM11565408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552992fa85964ad77cebc9d184d840442789a31dad981110f5f68db86ce60c23. 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/GBAJU2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb088517439f4c7bfca08e5ddb933e6743a38699c6ea4d32715d8a989c53096. 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/GBAJU2000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967682c5573681527ddd8ef79b3a229371df0342e58aba4f6123d37db982b767. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAJU2000090.
Stravinsky: Oedipus Rex & Apollon musagète
Oedipus Rex, Prologue and Act I: "Spectateurs, vous allez entendre…"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330bfcee500ac99b8768cc39b9a86bbb5c9b88b17351d21789d817461a6dc29c. 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/GBDGQ1325101.
Apollon musagète: I. Premier Tableau, Naissance d'Apollon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62619de5f06f0a49fb82aef201829e3795ca496aad7a8d8bb82995337fcd697e. 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/GBDGQ1325001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2d49794188497dfe9a8194427e15a95da6ac0e1510e86ad99326c7bbe8993. 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/GBDGQ1325010.
The Planets, Op. 32, H. 125: III. Mercury, the Winged Messenger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1089bbed1309494bb1e34a15473d2d7e50ec4b0f1a77077fbd9f59bbb6852be. 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/DELW72320803.
Meditations for Students from the Benson-Henry Institute
Mahler: Symphony No. 2: V. Im Tempo des Scherzo (Radio Edit)