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 0xa09afb69be57acf6cb1df1c14dc017e1278f858321106fbfdfcc0fce13b1f492. 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/4f72284d-414f-46bf-8399-fe3a7dbd0130.json and https://artists.proofprofile.net/proofs/artist/4f72284d-414f-46bf-8399-fe3a7dbd0130.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello Suite No. 1 in G Major, BWV 1007 (Arr. for Guitar by Borbála Seres): II. Allemande
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 0x0887736fe637a7f5a8826e99e597abe5a4b59fd5de6a8413c0d35c479e6f046d. 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/QMBZ92332461.
Cello Suite No. 1 in G Major, BWV 1007 (Arr. for Guitar by Borbála Seres): III. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac78d6968bf16e11b57b7458ffe48012b4c1650a05d25fa942695fe3ae17d220. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92332462.
Cello Suite No. 1 in G Major, BWV 1007 (Arr. for Guitar by Borbála Seres): V. Menuets I & II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eeb9968891f7a65bf147507ca46b61a8cfb85ac671d88c08c2074ce687d4d2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92332464.
Cello Suite No. 1 in G Major, BWV 1007 (Arr. for Guitar by Borbála Seres): VI. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1558eb783e2bce3a92c68e9c58a771a4736d3632b8893268d99632e126b98eb9. 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/QMBZ92332465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abffd53a3c3ebb6228606045f66d63914ac44b43e7cba91afb567894a101e4b. 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/QMBZ92332467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e568b4b90eace57d8b4ce9881d7c3e3b293d1b8103fd07186b1a2f002279a4. 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/QMBZ92332472.
Cello Suite No. 1 in G Major, BWV 1007 (Arr. for Guitar by Borbála Seres): I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaff3bdbabbff61b7c8c12f48f78c73fd160de8dedc6e2e35d3d44a4d03a7a51. 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/QMBZ92332460.
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
Cello Suite No. 1 in G Major, BWV 1007 (Arr. for Guitar by Borbála Seres): IV. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed95af4e37a209434e4569859867431e511c0110cb0e309eac93d6e52a4c466. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QMBZ92332463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9157baba4732942c14f53db695fc323912fbc2ac6abb4946713d40e3ff691e14. 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/QMBZ92332470.