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 0xc27c502567dbd6b1e5fa542f5d586f2afd7e33d8b53f3bb4b084c119e3c03b5e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ead6e23b-05db-4501-9963-5defe9e7bf54.json and https://artists.proofprofile.net/proofs/artist/ead6e23b-05db-4501-9963-5defe9e7bf54.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 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 0x87a1353e98b680d4c8dbf277bb60eb6da9d75695bc1065cd4be4595ef603c3b2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM3DF2215522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7f3882cb3a713254da5ea9b4dd0461bb631b2a517ba4a6cba88278d5a555d4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/UKZGC2304338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03465e55fe8cc66308e745e74e09ed398e11109a60af0b8d34bdbddcdb00ca6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKZGC2304626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb074c06776583fc30d77127a12a8a423a4aff55f43a4b382d42fa30ad49f508. 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/UKZGC2304631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b2d2864da61640434104745742eaa026a465073afb2da08ff94a55193a1bd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/UKZGC2307064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cfa0c1059c8d7f3192df88b62f318a5edbe7e51628d79554200956de1505eb. 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/UKZGC2307054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771b87587bc99f4a9df34fffce0eb4b91719291c131b7cc8b9b32d5ccf978f9f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/UKZGC2307058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0419b4bdc7303012b9e38d1331c8841b059656064fbc48f2d8d888c311be03. 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/UKZGC2307061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e294004406abd3a4bd1d37f71365763a3e851a50b1dedd542a6f4afe5ad5c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKZGC2307062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdade11bc87bcd889871ba92f9ffc86c5b567cad9c540838a235ac293d7ec48. 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/UKZGC2308043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8aab08279d83de8efdd0f6db8ee07de69d979e5edb1b3eb5060035c339a860. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/UKZGC2308042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfefa06b34049a0f7edd283031e8aae8883ea05da0d381600bd2d2049e736074. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKZGC2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60953324711a3517039533a23c4a698be0c6ce978a46291b36179125c7e74809. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKZGC2400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d1f6bfd4f2b69950980ff6bf4a5b5b6c61f47c70a61d73e0d32b42987495d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52481401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d1f6bfd4f2b69950980ff6bf4a5b5b6c61f47c70a61d73e0d32b42987495d. 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/QZHN52481401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1c2b4763e2cfb0ce06719d198baf4d1841bbe81f8e839f9aa446bbd2156ae8. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNWZ2439720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1c2b4763e2cfb0ce06719d198baf4d1841bbe81f8e839f9aa446bbd2156ae8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWZ2439720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cca8da500f9343577687895333258445768cf9b8e356690490b408d644fb49. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZNWZ2433110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cca8da500f9343577687895333258445768cf9b8e356690490b408d644fb49. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWZ2433110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c28a2f9207b081d920d3347607a8ca0e6f7f435c28761c6ca89066927cbb4. 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/QZTBF2443704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c28a2f9207b081d920d3347607a8ca0e6f7f435c28761c6ca89066927cbb4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBF2443704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f35b4c60051ada0d3fa82d7b88afae1d359969e5990e1288a4097490f08a08. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZPEW2560965.