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 0xd497db8f075809631dcc0b0b1535c0c44bbf64ed35d1939eeb6744ee40966552. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f98d47c-c3d0-4c23-a096-8cc30b9885c0.json and https://artists.proofprofile.net/proofs/artist/8f98d47c-c3d0-4c23-a096-8cc30b9885c0.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 0xe154afc15270bc61a1c61b666319b24dcef20a93a69b97f4e7473a952049489b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:58:34Z), 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/QZHN32352150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4178140583335e9c701f7659f4778aad17893d757f743198d5ca407048cfe38. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN32471125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c11afeecdf2d32bd9ca21aca4bba7de34c083debab5e02de918ce7379c7e784. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZK6J2492210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdcf1910f798b9b5dd818ace2d766fad4611d138040e404dcfcb4ec7ae2a5b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBC2454160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a0c54c753ba7d4b557c45c051e7ec3bfb953866c2f8ea878955933ce73132. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:51:45Z), 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/QZWFG2467260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa036a5cb101b28229c8872acbfe57f220dabd18056331baf5dcd1dccc73da3c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFL2443954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eb2fd73aa4a1fc795de3378d7967624f54ac42152f0e2cccf18080b834630d. 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/QZWFT2483389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157199ba18eaeda0bf99dfd777eb43493492d1b4e017c56d0a7b5ac2b8b0a21c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZWFX2478142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4c6e165870268e9130529f5b913104e410e77f31b63da862e94c011219ae80. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:19Z), 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/QT3EZ2485634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967558edaa7e69c63b77fb6ec611ea25a949d9e86931bd1d3965226b616946ec. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEM2569561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ef6275491f3c0627a305a14e501982f262d725e0c731ba60083ef4d613dbf0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFT2546382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e973afb91672e4be102bd87afde53b4b8c053abebf28a585f875159e6da8b5. 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/QZZ7V2568580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da84c5bd373a9ac7dd81dce62b1b49e48e4be41db905dc153a73c32afe7fee1. 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/QT3F22576077.