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 0x3d9abcffc0a1e1e228d9bf82ce653494d20e5fd6b202e365651e10e9b205a959. 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/1bbe85ac-a7c1-47d2-815a-8a58ca6dfcd4.json and https://artists.proofprofile.net/proofs/artist/1bbe85ac-a7c1-47d2-815a-8a58ca6dfcd4.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 0xed18326eee6d4e3d92534f879f917ffd0af8ff9eab5931d9aa47c253ab316ced. 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/USUYG1404922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b025b8b8972e5e78abfd90bb800d15db4e597a2725277cfa62f23369d11fdcb. 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/USUYG1404923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe961453cbe1f6a0063a18025b3d8930800e40193d2bde45445cd537cce28169. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:42Z), 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/USUYG1404924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ac19e4c24c40ac02a3de2c3dfe4db8bfd2504757cb15fc04d98436ee12cef. 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/USUYG1404925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ba3426cf92f1afe14b47850865b4b03637a270337d42d8c890d9b271ff4db. 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/USUYG1404930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ee908988a545f44f19dba99f0fc450c81b7e88590511df8240f81fcafdbbf5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1350634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdb466c20f7de9f51edda7a100daff6e1c93e0c4d3b0f5108f2b0ba390ca87f. 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/USUYG1350636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d464ec147d944bc8a6b9fddf8f8f70047cda53b5e6d16a69789cb31710d97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1350641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1760c3d21288d471033fbfcc8236ec472566ead16f970ad516fcc0192d30e13c. 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/USUYG1350648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f4a546b84d0dab11ffecacdf1062585aa3d9a2c325211a7ea49e061d8c631c. 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/USUYG1224955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b3fdb86a136e17139f70166ec2e0769cafc63a9f1e88ed4fe763290e8c756. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1224983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c8c41716eda776e04a16a1758a31f71495144317198b9ee152fd99b5e4b191. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1224956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d1619100678e237a26ada03c8d890e8b9ecfaba68a8fb04d2fafcc16be1fa. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:10:12Z), 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/USUYG1224958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb520917bb91d20835cf73778a3521574fdc92743e469df6f26af9cc624f6e. 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/USUYG1224963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6475439e0887f3ff97fcf7bd75b1409e0d093316d3c9712219bdc93c88a00c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1224964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b37582709545ac52d8de76526628d9d3e1bcea2a3e00f183a1b99c084d92d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1804676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22165fb8b451606bbc1fcaab41f5b05897ae7cdf05d8b6d133d214c2fec9a0db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1804677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df933a0856eb58e6562c0581229e7548a7ffa33d387805ee4947eef10b9f9df. 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/QM24S1804678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43a9602ca576b10bcdc6fd2b7c8e1059cab26d43e6c5a9f53b9906f6b490ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1804679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdd368fea2056c5a7645b05053fa371b833e2fa36b0dae9ad06f431222025d4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:58Z), 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/QM24S1804680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2bf4d7171b606f0ee1e97b8c3914f30d9f95e80eba9349003d254a6981bf0. 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/QM24S1804685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16370d0bbdf48a470d048364ea98f80a1297afaaf7624f06b42a6dbcad45c67d. 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/USUYG1180548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e1fd754844efa217544c49d9d7f31e44e9650dd849e9c698eec159eea56f2f. 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/USUYG1180621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c4dee43430c9eb7942c9ea9d47b9698b1f36fd242f2e86ae9f7551727ad72. 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/USUYG1180622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b938709e89d53a035a9159593a75aa1468b487169b7b38e1c6931b72e709961. 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/USUYG1180971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdf8bcae1954f087a77186338e3ff3d545ad1af24c76fcc083e8cedbc0a89d8. 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/USUYG1180978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a1179555f9a2fb6cc0d7fd77e60018de2db138eb4c0671a257f47914928738. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1180979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1047a14d1bd54459c105f20db3e4f1411ddcdbae8b9381588605be13045a60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7811106723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aa879aaccca972cb05c09a82fd581d237a2d6710635e035533ccd0024c7f1d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7811106621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe538fc14e2ce71044fc88bff138d29041f7a84a88f5593d1abcc81b12c8b27. 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/CH7811106587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6903a1ab09c725ffb66dfa3e4787375197fe14b318081bffaf045989b05396f2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1406324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3442d262f71757d6d7a798eefe6313092659d142f0a6217175e136c296417849. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNB82038660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0cfd71e989612cff472af0a813888de4e7007b7e5e7bb0696093908153563. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1266302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0288321d8a7eb5e65e64c29858ded76694a7dc866c11a4354461e57a042a74. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1825294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a7e575f880d26310b27545e9427a749a998ed8291f4325ecf03e0621a5852f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM24S1822025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae70204cb1f7b8cf53676ed3094fac1a2b8aac7f2b9094fac82e0804732c040. 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/QM24S1820109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49728630e4d354e338c28d539a909add3fde6783535e7f8a4a540260e6ae6448. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1206570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee953e6a16485231cf87779c987375e757d1c96319e717d9346142e8bb9fc93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1202167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482934b07a2f2c94644ba1c0f02cc480ec25ce5383003ba6bb99d4d78553235. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAT22300699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1ea4ff613c5c0f86186cbcd15df4dc75a2ec9bd49288593cec5a94e34a6fb1. 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/USAT21905454.