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 0xf67a8222289824c38c1f62bdeaf3944388ca1f254bb3b37687c5c84c2f8dee9d. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14d409f6-7288-405a-8d11-2bc0c8c19841.json and https://artists.proofprofile.net/proofs/artist/14d409f6-7288-405a-8d11-2bc0c8c19841.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vollendung (Works of the classical era for Viola da gamba)
Die Himmel erzählen die Ehre Gottes, SWV 386
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 0xb1ba2f249a0db849d1d91d132e72e289d2db5b6488ba18b616c274023e625cf8. 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/DEAC61903001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe2aa7eae9e6ea2b4ab4e07257b4b2c5f338e4dd3eec4bd009dbf090da45b4a. 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/DEAC61903002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdfc21e6d7aaf52b8b4fbcd5015b680aa025f235ec0e9afbd52b40f4d930e97. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DEAC61903003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197074a9becb8aafe6bd665ffdd3100c8e1886f19b69a2ab1039123623f299b8. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEAC61903004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef342a89e6e56d2a00a2c7bcb86a3881ed9c8e9c434a0c20a9a9de432984fa2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAC61903005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b656e884a07b937fe6867810c589074bd3f89622fab8f6339027f9a669eec1. 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/DEAC61903006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a14a9c7013ca91050353a6d008fc2166aa57eb9841e9d82a3b6b7b7842db9. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEAC61903007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b825025759565564fdb1cdb4d84b34ef863c172f95dcae689f798fb28c1779. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEAC61903008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e7bbe7b13da55717217b91032d2de8b3f32087d63d6743ba31443cece60d5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEAC61903009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0246b6098040b39f048838e31b7bfbb2c9ec63ce070a999f2eb6ae081ebabbe5. 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/DEAC61903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8530dbdb6fb7612d8c2da19f57b2c2cf7aa9d09a64e0c97c585809257308a4. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEAC61903011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbbeb575aae1a0bf9738be06a85566ab3ac5470d6309c0c33d153426415cca7. 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/DEAC61903012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cbb349ae5bb55b3f910d5c4a3821c6c03e5ebcf36eeee19b11bf512265d75c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEAC61903013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c33445ca75ff34cb8a33d63e6bb4ea6e76a0d003d39956c9d8a6a61ddb9875. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEAC61903014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c38cb98d419ee705b6b6fbdb2e9bf4457a922b9e0ebff15610cfecd9144262. 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/DEAC61903015.