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 0x9e3818e32ee8c926d4dd357bf1ecdf310e9486e048750443731f3df4729ff7f8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fbf09bf-6477-4e10-9b35-95d772e4f78e.json and https://artists.proofprofile.net/proofs/artist/1fbf09bf-6477-4e10-9b35-95d772e4f78e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x527aea0502b4dead10ac9b8f483900345cfb5c543b8bd4bef6a00d2fa203a030. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLC062509970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e751cab56e12ab9e88657712148874cccd81f4f83f230acf8818f2436353a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:43Z), 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/PLC062502503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd03028b838ac464aac95958202d498957d66e8e0a544b2b3fbfb0f19df5a07. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/PLC062425597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e9d9a4c74068c81bbdd834451212329ff1c82d7d1c31710b4bac4f2e4afb0d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLC062514574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3e1900d52133a0167bd8e58e5614e39630784d68929a7715919a3b611b9e3b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:17Z), 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/PLC062530249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46521b9345010e6c50c977629ba8595c0463358b9f77916db67049c837cc7c8e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLC062527406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79984e518b0ea784b5991ae3a287ee4de519f6df2a7051e9325ea959476bd040. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:37Z), 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/QZWFM2575635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73c99f3653f626084f944e2a6dde3062075d76ba7f2aa18c342ff091cd1ae89. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFQ2521883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94021e20fdcb92f74a9224ae76b51f18a2613452d1727d93ac35628bb8ff1787. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFW2560001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d621c2a3d11c444cf8de9028e0336d30e2d96d36ed3783b9674e41b413505. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:06Z), 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/QT3F32515560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56be9e2d48b4435ca98c9500b6e18b2184e9783f3bc908a735a8406a9d63b6c4. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F32515562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfb00167964e511da8653e5af338ee2ee500ced731c079b7c52cd0b335f56a1. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT3F32515563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d36b3293197049af9eca6c1ac5a950005f643d953d42dcb800af78b5d86b225. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F32515564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61517086e470a2b9edefdc0675a5490942a4a9cb32aeba55654bfb95168c7ca0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F32515565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a960a1d6bfe7c50d2c47d9cdc5a6b3bb56623c235bdc10f5a3577fe7da676da. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F32515566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6a1ebe1c0ef9f63e98c9a737d3ae1da6306a0e60c1c183a67769740bbf312e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3FB2520891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadc8b71872f0b8c9e12b70eff3aa6dca1cdd7ce16abb14f58a384a83b27ec99. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FB2520892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea8561318d9eb6ccdc43730620d34e9abb924ed4bb76b18f466089282818289. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6E62507764.