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 0xecddc6f8eb1af27af348b670e7f8d6d05a37d324acbd81e198f0ca54256000a5. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29a9207d-66a6-4ae9-9e41-7649b78420f0.json and https://artists.proofprofile.net/proofs/artist/29a9207d-66a6-4ae9-9e41-7649b78420f0.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 0x425fc7fff75a88644c49477306841337600bd9bb2e33d30d65828c23264d7f24. 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/IL1021810481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dccbf3ff922aeb2728dcffe6231a9dd46eda02b2c806cca99d016cef4f33dac. 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/IL1021810483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122e49eb1c7d6600ff7bc45195824a062a2651feb79ceb8fc9df9a7abb0f986c. 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/IL1021810486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f40151269ab28740f708ed13fe20a1b22455860fe7cc683294867b5a86577. 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/USX9P2370049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02f79c53f126daa87a9c61e77ec5c4dead859f5f89f5df6e27c37501b77279. 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/USX9P2370062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e201ada6c8c7e5668f0398d8456a0614c827e0e2e7fedc4164cfd5d022712d. 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/GBSMU3940561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bcf747ac4a2a01b8d00b940f36bca912177e70183660b3343b2750f546b1f0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSMU3940562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd67a013c853d43ea29af7756b3f83f33f43c838fce0fb7052c061e68492fe1. 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/GBSMU3940563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be3276dc842c43fc9521cdea4c1e084213835355fce377c79d4c135f27c7c5b. 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/GBSMU3940564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202c8549c7ba4adfaefdef7f37198698aba17f2529a1e3358a45cfd9cfc5969c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBSMU3940567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c12c00f5268f0c973d5bb32d57f85b0abe6f37d8c6dec52664fb553cc87d5. 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/GBSMU3940568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53445a8dcc02f55d50c7f5d58b12e1b019679f0b2806be25d42530dd696cb098. 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/GBSMU3940570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cba7191e7e17c640e6fb56103c2d7661c7b2ccd2990bf0b0f96c830fd90d1ea. 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/IL6191801433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afbe511f5e3c21b6435e4bf46635e92531658a6e920a56383e2b660d9940244. 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/IL1042201581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392549848add2606ad7358053a4d1a813b1ab54c33c88e9204068be4e256c06. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/IL1042205801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3e1276e7d6462821541f7a8a061b04c06da433b169e4fec74312d0056e5806. 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/IL1042205802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070d3e88fe79929226ba708e1101c80d5b7f52d7473cf7d34edfa26a903138bb. 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/IL1042205803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afbe511f5e3c21b6435e4bf46635e92531658a6e920a56383e2b660d9940244. 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/IL1042201581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad972046221778f90848aac2819ff41c0696683d6cb1d1296cc719391e216da8. 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/QZES52219910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6948f283324551d3e0eb3eabf4a63206645e80c4ca977ae7c749c0cf2b2264e. 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/IL5842340905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e469a1afccde09b018f36c62339fc1f2d90f5dcf69ebf73f47bfba8d7a76b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/IL5842340906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c911491d3515fe64d5d1442e6a2d44b0aa45e827b5a8de4f19d55a3e422d11. 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/IL5842340907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf94803e9ffcbdd8ea8cfdd88e975fd9ef27e4cb5451b59779413def945fa2. 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/IL5842340345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee39cd0c999cb342a2e85f7b1162319f396ba256c90edcdae89100932d7769. 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/IL5842340908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401350dbda61e9f640e4e55862233f42cbfabf011d3791c3d8027ebc8f4d7fa4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/IL5842340878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7effc8f99859d5ec01afd8398417c7450b07abea876d53dbbad4e8eaaf469c. 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/IL5842340910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8b38f77c0e3eee46fddd83ccc57fc6c9426c1b761968949029bce690bc60d1. 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/IL5842340911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e5c6dc89cbeeca6c40b2e5a11173e183ca6f07b13f911635ac72c711d44269. 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/IL5842340914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383782673b36db74508ec39c311af716008c6d0656de5cea2ee8b196fe607534. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL5842238372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6102d83044d8cf1861630f79da630a33a28bc25ffe7c310b8b0518a99f65ef93. 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/IL6192001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495f6f792976ecd0842476b9c6694f7ded4dfac2facd8d2986ca1c474bca07d3. 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/IL6192304422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0564d9776bad7796fc8280f2786f46d06d6d47e18ae9b41d5a78f6f70b140a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/IL6192304423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00cac0a61659a82bd963298ce626c184a8735fef288b07e1daced9444341b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL6192304426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7202adf49072929b6bf3fad4f148b53f440b8020348a89f4b3ff926b941a049d. 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/IL6192000113.