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 0x38cd34e722524abbb0c2d307b2a74b8dc7a1123b8e92bc950a7952ecdccd226f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4078b9aa-9ab5-48a5-b65f-df89b30a1c47.json and https://artists.proofprofile.net/proofs/artist/4078b9aa-9ab5-48a5-b65f-df89b30a1c47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Easter Oratorio, BWV 249: V. Aria (Soprano): Seele, deine Spezereien
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 0x34fa638672cee548783d22c6a7485e9de699da8b1734aad66025005f5f09be43. 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/GBELX2409274.
Easter Oratorio, BWV 249: VI. Recitativo (ATB): Hier ist die Gruft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb17b268945e21640d6750abb3a6dc9145674d118f9056b97f9ff642a423f75a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBELX2409275.
Easter Oratorio, BWV 249: VII. Aria (Tenor): Sanfte soll mein Todeskummer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efac19612aea9089aac6dab52531eab9fcd166a9b36413a815f3037e4bc6895. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBELX2409276.
Magnificat in D Major, BWV 243: IX. Aria: Esurientes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7ff30088358135d3e3a5709db6d60e0b36f259610f4fe72a3b8a59bdff6fea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBELX2409289.
Magnificat in D Major, BWV 243: XI. Chorus: Sicut locutus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01268302192258dde18adc247340cc64bdb20d25103cf7a8a487250dc7f671af. 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/GBELX2409291.
Magnificat in D Major, BWV 243: XII. Chorus: Gloria Patri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42f32f32e3b7850e01d1571d194b0ef74c1e6f5d787f86381956e1b38324560. 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/GBELX2409292.
Easter Oratorio, BWV 249: IV. Recitativo (SATB): O kalter Männer Sinn!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d1436f007c89aa371db49fcb8c432d9e67c69ffe45ca339f9109807daa1fd7. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBELX2409273.
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
Easter Oratorio, BWV 249: VIII. Recitativo (SA): Indessen seufzen wir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3159d7df5e0e372b82a9c7a16dd9f01995a326a4ecd3519d68b168fd51f1cff. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBELX2409277.
Easter Oratorio, BWV 249: X. Recitativo (Bass): Wir sind erfreut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85acb23072aa4f414702fa03ea5b37d63d1ef0f271265bf167ec67b3544e1b15. 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/GBELX2409279.
Magnificat in D Major, BWV 243: III. Aria: Quia respexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886fb0f6a70ef6b6fcd29dab26886e4abe440519ba495330264a244aae4a21a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBELX2409283.
Magnificat in D Major, BWV 243: V. Aria: Quia fecit mihi magna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d30be556f0b884470561f4f7e5409b07d8f3094a5ea10477860cd1705be106e. 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/GBELX2409285.
Magnificat in D Major, BWV 243: X. Terzetto: Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbbb993f17bde48f5a60d2bdd4eb9a3439986238a738c4578a6dc9abfbc5326. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBELX2409290.