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 0x890e388a4a33ff4637baab002c5a4b27cc0d36c65158a78ae3385ee25b2243df. 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/3f77839d-4047-4cef-8655-4ea4760c378f.json and https://artists.proofprofile.net/proofs/artist/3f77839d-4047-4cef-8655-4ea4760c378f.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 0x2e7ba536192bd6adb201dfdbdc39476399174c9d9c269093d3ee451251b8ef3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1662680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc501682565fef4c334c2f0425bfaa5523cb53e1f7ecaab56ff268467108b5a68. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGH1662684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed5c13621772f23481e767c3abae242cc0b5165691315d204ea5240709aa22b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1662685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc015856dc095bd98d8eb0774373b4c8ea12378b7c05de195d98205a17e541a6f. 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/USCGH1662687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d539a14bdcea9d7ae7721bf98470bad1cbece4f00b510036e720d5333cd86a6. 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/USCGH1662688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd1599e0f5e510f9d3e8c00c3c111479975248f67866b1380475902fd88b6d0. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USCGH1662682.
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 0xb1bea3ee7d4547c127d5be8ec213e1a8b2b28eae05a2c38d9cfc210ffbbbcf46. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGH1662683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaae8643c3de2cbab27d0ad8a9e0cd0007a4962322a4f270294a4abba6595d9f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1662686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3149aaffd47599c61ad9fe6a54ad1cbd96fdf4463bdf0bf0f4188a64a4aac03b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51247247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a053af52e2141a6976aa6730e5b1e4d3d0581be9ea3231480511cc87180f40. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51247249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da2d9f6613a993a9a4a6af3fae4337629671bff8585cdf45688f14cc525516d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51247251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b589e97d9f39a0dee88a34d4796f9d3ee70ca6413511617ab50893befc8c4be. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USQY51247252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03937f2a5307f58fafda304b05a138ce797aa413cc8ef0b4860ee3a24fa3485f. 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/USQY51247253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfd00a79e55bd0f2971845fcb24f3194c2430e1ce3c9a0f820973f7d60b8fe6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USQY51247254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab54ad13078920a65e5359601f7dcca46d26f56d8c6b9266c3c763fac1848a7. 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/USQY51247256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86509eea3f068528bbcd795452b9634781e457babd3cb209b767cd679605f2a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1659479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba40f12ec66734f8a93b24c395aeab869bcd748bdf17e623341641c79939802. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH1659483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1dfebf042ee0a9a22596fd6d02240c41178f801663c572db7fda31d03a039d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1659485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1369fa89df422f8e11254a524489648f01214ea18fd0dcddbfb41d9550c2b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGH1659478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eecf7ecafa76a9b1d2c8259414bc84adde0ece1ae6ac25bda859d339c47da9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH1659480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89223313cdceebedf2e17300fd4afb2d7f0c90e4dbbcf7864b9a0d09ad27f437. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGH1659481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc8eeb4414aa129af3a9a61e6b2aad48dc31ff4fc8c24e2b21bc646c2f761d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGH1659482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0fc59ebc350e3b190e251e9531a1b4a1ec25ff4e54b20527115d7eded9211. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USCGH1659484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cac6cf70a3fc3b65a2111de9e3b574f5f051d0fca5562c65c4ec41bd24acd01. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USCGH1659486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f59bd2e9b48d1cf42b19c1741b51d89d687b6bccbcee649deabcb1f55c402f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51375605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca98fbeec2386a2c72fa6db0ec490133df39f9bc4a2adca10e82ced0c7b76f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51375606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d41753942d6312cba517eac5a88d6cb5537c4cd10398ea981c0c3c69f2dbaf3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQY51375608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f48500140e4e5f73e928aa8f3d74992c6640c910cd73ddb02b58057cc9c95. 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/USQY51375609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c5e8896bd10c0dbe0546ee8e70b5297df7b2bfef1087d7940a84cdae64e569. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USQY51375610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612753d8cd55c891e777d1ceddba3447caefee701f86b72bd69fde154a18604e. 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/USQY51375611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cb660c4ac6b25f040a00fb90ec46b30ab6d773320bed03bc8b444b80d2c166. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51375613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab28d4160802803ff8747b692834e58df553eecec42320ff150de9b088d906. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USQY51375604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482296365a70483425d32ffec36b2b35f61621de1d6b48c2c799293dd630d598. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USQY51375607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8cd9068d822414193c206fecf12b1aff6f9e173788df048c5f8148d0622b3f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USQY51375612.