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 0x9052fa40604bed0e48f3a8e0adcf2032057fb64db450819a29af4100c1857044. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d847188-b6a9-404b-9791-7d2b366b5c08.json and https://artists.proofprofile.net/proofs/artist/5d847188-b6a9-404b-9791-7d2b366b5c08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Singet dem Herrn ein neues Lied (Bass, Chorus)
Mendelssohn, Felix: Psalms 42, 98, 114, 115
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 0x1e05f9d2a8c7e8a0c118ef93acf722e50c8545a1228f20a4057010dd81e381bd. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/DEA550312374.
Singet dem Herrn, Op. 91, "Psalm 98": Der Herr lasst sein Heil verkundigen (Soprano, Tenor, Bass, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52dc138bdb05eab86e706adaf86356951493e5974a2b9a42ba5cafdc1613dea. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEA550312375.
Singet dem Herrn, Op. 91, "Psalm 98": Jauchzet dem Herrn alle Weit (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbede118c04026f0867b898dc2cc40a0e59b4c41f7542ea86feae962ba7026687. 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/DEA550312376.
Singet dem Herrn, Op. 91, "Psalm 98": Er wird den Erdkreis richten mit Gerechtigkeit (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3745e46de591382ec02b0dd4869715237f9c08aa1d97b7864084ba297ed5108b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEA550312377.
Psalm 115, Op. 31: Nicht unserm Namen, Herr, nur deinem geheilligten (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf23e5c611d768f3b7ae70a6a45aa42a9e852d7050f81421f850b27d6f29da9. 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/DEA550312378.
Psalm 115, Op. 31: Duet: Israel hofft auf dich, du wirst sie beschutzen in Not (Soprano, Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a73e46fbacbd3dee2dab273123fbc0e2f51c63d693d9a3ea852ce40b60cc2. 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/DEA550312379.
Psalm 115, Op. 31: Aria: Er segne euch je mehr und mehr (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48448a6098cdf1ade7b6f22a4aff975cba8d29e887893ebdcfbd9bf7b7be3cbd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEA550312380.