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 0x2f953ccab04cd8c0dc123e55967b9be3d4cb010cb91b46d969e7c77a205275a9. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/424ea0b3-0509-4282-8e03-332ccdefdeaa.json and https://artists.proofprofile.net/proofs/artist/424ea0b3-0509-4282-8e03-332ccdefdeaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thematis Regii Elaborationes Canonicae - Musikales Opfer, BWV 1079: Canon a 2 cancrizans
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 0xefd42af377571e265239764a78d3a95df0dc34e574e926864d06e4ac7a7a5742. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLK170800060.
Thematis Regii Elaborationes Canonicae - Musikales Opfer, BWV 1079: Canon a 2 Violini in unisono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbe202a32107fc3a5361a16f1a03dc99bc9cf4b8b004d60b4efb6ca8f97016e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLK170800061.
Thematis Regii Elaborationes Canonicae - Musikales Opfer, BWV 1079: Canon a 2 per Motum contrarium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29530c568113d84f0311df2d7e654462c91dcb1011c2e5dbfa828ad3771b8e4b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLK170800062.
Thematis Regii Elaborationes Canonicae - Musikales Opfer, BWV 1079: Canon a 2 per Augmentationem, contrario Motu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cbe878049601a9c61e49927a47ee4b5cf0790f1b6604ef0b68728185875d9e. 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/NLK170800063.
Ricercar a 6 - Musikales Opfer, BWV 1079
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfbc486c7c32f973e67bf1bdac9016723bd57425bb402a3aa0d75011ba6efcc. 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/NLK170800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5824d9ae17cb0a97bb52ac7049c896e6c9dd8d20a5df5642d4efeea3ecf310e. 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/NLK170800075.