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 0x9eeebb062d0d56ef431efc24918910db49e5c912b1c7ae6ac29dd0ced356eb94. 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/13706f0d-9194-414d-9a6a-54fcf5d21b69.json and https://artists.proofprofile.net/proofs/artist/13706f0d-9194-414d-9a6a-54fcf5d21b69.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 0xa4a34409b23de71554de695e0c1bb8b6776bc95696f9e0ef79e033c80faf9a88. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZEKE1864415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128fa2c7303ff9b4d05c59e967df952f476ecd0d89b6e954ba539d037b276fd. 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/QZEKE1864416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68434cc71d7613d24c85786ff1cb83526178091de41bcd18b6558abfcf3d661f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZEKE1864417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8b26bab124183314f813cf8d26a9d84004fce2bb9ca4db58193561a0e5415d. 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/QZEKE1864418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae9fa778a854f50ba1a2ddf462563937c30bd012a14b547e876470eb80b3f84. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZEKE1864419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2595b5acb068fe5475eb0e1552e9d25a4854ee6d321f52f1d1aa0634019e953. 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/QZEKE1864420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea854d1249650fcb56c3e13c33436972036006d225b3931d0c50f43c492ff4. 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/QZEKE1864421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2fc320992c7a76564747a465073de0e056d228e6c8998d5de313cb54a0664c. 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/QZEKE1864422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777b5ba9d68e34be9e5e78dc96acea58f2c82a272e56954e2afef4434de716ad. 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/QZEKE1864423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d379f89b6a138d91f739ce954bfdc96e78856ad4049876aa7dc1eb68f35c4fe. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZEKE1864424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec990c66490d822fc8083446d064e7e9656898ebed1e3ccc5d2a49a0d8d1b8. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZEKE1864425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388472dc26e4c2b55382b095e52530a123b56e93fafccaba9c002655f2844289. 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/QZEKE1864426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9a529bf6bc854d3e727d13ed7bbd9bc41eadc61c6131687f55cb1034cd1c24. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZEKE1864427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a04ad3dcd33e38b9e10263705f63670b7fd0349eb1d2df63e0c9d0f5bb8af7. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZEKE1864428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cbaa4a1cde113921798c1a004bb11193062f9ee6d8812660487fc0b6eb400d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZEKE1864429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c44b920bfb1b315a941022b59c85d57d57c108f4a2a0ce3e616d8e469cb634c. 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/QZEKE1864431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc825488180b252f906bd7653c35252c20f410febb183d7d0628a739df229ba15. 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/QZEKE1864432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3a9b70b0d6a94a03b352eced3e00ad8abbb7a2c2bdfd7c1c637c4de6152e87. 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/QZEKE1864433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029e43492a52c3f370f2dac91b0e095eead3d23e162a55acf32be64c49fa4f00. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZEKE1864434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53f32db792319267836aca0dc39099ff9999dc30c3a9e6bbc9720d3e52b4d81. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZEKE1864435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5fc6bde95ebf331b337bdea7dae056fbd2c2576d8242d1104e8b95854ce125. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZEKE1864436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f6c6e68691cdd0464eae85a643f18c2ae8f5fd1ac9e0ee09cf487b368af655. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZEKE1864437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559071f3d2ee4af8567a48b2f5acc85e4c25a6080d364ae2d9a188d40f116624. 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/QZEKE1864438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd492e3bcb86446d82094cc04f0d243483038219f2257b6f992db4a82f68e8bfc. 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/QZEKE1864439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609078cc1052c68703aca0d7b20105e3e1e73c0ac8a7e3d1cc0399abb01648b4. 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/QZEKE1864440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8341a9c380678779d1452e2d7d782f35006eaa92af85d2ab3adc51fbd38d43. 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/QZEKE1864441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b59df2d74c8b41809b1a10a3fa79d4bcd7bc37372b783768e954f8a816f01. 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/QZEKE1864442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa930d032247447416eb80dbd33f04d796b18cee62cfcbdd428ee4cce63c2a2b7. 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/QZEKE1864443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb3c43376b31249ac71cfd6066d4390847a9df275edb2bd38c84f9af906def8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZEKE1864444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7420576ac2abf0708f0bc764d9d32b62ff716a920d8adde8be0497a9bb3625. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZEKE1864445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a8d820741bcef7123161075c509a02ebdeee77bcb093f6e4d97023c299f85. 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/QZEKE1864446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439e4fdd1086cbd283cb2ffe1a0e27660dca4c06e7116ebd766cf442091e8e2. 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/QZEKE1864447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757ceba48f72e2b5628f11c2162d3008879c121f9248b4457d27d18afe7fd945. 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/QZEKE1864448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dadd3fcaf0992b2e6614b9cab1bf13a4c1b9f7844152902b35190dc032adf4. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZEKE1864449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf847e2e23094ef79733feaacc9d985ff1d6f2bedd90a0bf382532a08ed508c8. 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/QZEKE1864450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507d1323e71b6bc3e215a7f35686de74c867626294bbf6088798f5c21c03240. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZEKE1864451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9edbb353842e89456428dca55c00c4375efd933d9d4a633fe2710d8b3c1a8f. 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/QZEKE1864452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd40f29283fae13be2f7b3662316311598316e72feb1117c1bbafa67154876a5. 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/QZEKE1864453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72730403901b559439274cb2a5d2801ef2050cd034807dc98c90fa1557954645. 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/QZEKE1864454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd8e255d471c74a1e54f2490064f82ff80d99a2e9f348f03a795a83099ded9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZEKE1864458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a00b31cd894293b4f6db0075cdc87bf6dec6d125bb200a199688ebbb343bf8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZEKE1864461.