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 0x3e66ba25cc3240a3f9a4624d115634f4ed296ca2014db3cb510e9f6c8b501c27. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6202648a-9798-4d0e-aa85-5ad38c4bca74.json and https://artists.proofprofile.net/proofs/artist/6202648a-9798-4d0e-aa85-5ad38c4bca74.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 0x93df31efed54273a5a833a8b494880914fa182103afe99e7460e3965f2a42915. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6DC1901694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b9c3cc97ef1ef823291166fec677d21f3416cb991414c62087038a5be3c2b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:23:55Z), 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/QM6DC1901696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2573a5abb18a7779d49f4f5afc897adc5fc40ec5443a7d2eb16e7960fc61f9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:34Z), 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/QM6DC1901697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c235a2dfc3c4e11c9671a53db9ba10abd9ff6a96383c68d82ff496f31e5075b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6DC1901698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f87360ec6dcffaec818004441b3af07b600c0922c09e17371dd371b4119dc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:42:21Z), 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/QM6DC1901699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9db20069678f70eed30696722a9b504ebf79d5f64d67e7d55473c4a6c06578d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:33:16Z), 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/QM6DC1901700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657ce30d4ee009343a9cf55612c4a96e5b291c1d08971b843ad04e188c280667. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6DC1901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508f5ae7515209c04a7e0287a1d2f8cfc1e94a840638ece4a915e9980e42903e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6DC1901702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93df31efed54273a5a833a8b494880914fa182103afe99e7460e3965f2a42915. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM6DC1901694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b9c3cc97ef1ef823291166fec677d21f3416cb991414c62087038a5be3c2b0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6DC1901696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c235a2dfc3c4e11c9671a53db9ba10abd9ff6a96383c68d82ff496f31e5075b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:43:16Z), 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/QM6DC1901698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137112be16c1c9e373da6945650e99015e8b90157b3b00740054df3be4e5e933. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:19Z), 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/QM6DC1968077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf140e038a4b96eee012ab0eed268857f1765c31628b711ec321133b375825cbe. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:00:56Z), 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/QM6DC1968082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf140e038a4b96eee012ab0eed268857f1765c31628b711ec321133b375825cbe. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6DC1968082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b3d11784fa0901ff5ee997c7da0fdd9a693d991bffeb2e6b4d5a3c814c3ff0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6DC2089086.