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 0xbc54ea48039cb121c05f8e19bec82b00bce30d91175b09340354a217b04526c7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89bf1c95-4048-4229-b52e-79c876a35b15.json and https://artists.proofprofile.net/proofs/artist/89bf1c95-4048-4229-b52e-79c876a35b15.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 0x00949b62a1fdfdc38a55317015b3b30df4878c263e5cbc7f006653c51f1201d7. 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/UKGZL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7f0ce05c1ed2780d1c383c5eb4dc1876c65a4f97fe496c5b16d7213105f0d. 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/UKGZL2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef707ea79849ad2f62a9cb11834f88149510f803d46a9e40acc7ada6ee08b63. 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/UKGZL2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3de6a3e07878fe3253b6122aa20d623f39f7d9a56cddad9c9ce481e6ae773d. 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/UKGZL2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0f8f29d7b7c472159197f3fc46084450012107466acb70af954f9549c62f85. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:08Z), 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/UKGZL2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9cac913cb84729ab811980299e17acdb0de972906233543b1c09cc51cbb960. 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/UKGZL2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df72b1ad7f59b8ab6a256168ff04e537586b916974fbd42b2a7e72c64296eb1. 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/UKGZL2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d8475766807554bb0ecaff2f29778270bfa2f222dceac9607810b99d7d4f51. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:53Z), 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/UKGZL2200003.
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 0x364e56ab3ff509c1f05bd04c79e94f52437001b3ccd4f0d8a06474a14a570b73. 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/UKGZL2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130fa9f960ecef563126bba9e48036ae93e9ace8509a34e3729636e88a2066a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKGZL2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162ad160c97c9c0b5625c9dcc941f07c23056da50d250775779f5a776ed728a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKGZL1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af824a3d4322631becf4bcf544e243a418252615a2822aeec70e6c32e0022a3. 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/UKGZL1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98535de74bdf6f9041e668aadc73a4a0600110f195527984c3ed29d30a4be19. 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/UKGZL1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbedf0f2a26e824e8c958ccbe10275825526f7c8bf92732b69b863e98a1ee22. 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/UKGZL1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc051f5c5d638bef74973764ead0dbd1f5532b2e7beb225ef0647a47ce2fca18. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UKGZL1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bd9eabfbed2732b5278bdd4c93dd45386d23669778f8d3771aa782e220fc1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/UKGZL1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38412d381d8dece6536c95ac122833ded2144090b7ff69a88cd5b5ccee56a23c. 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/UKGZL1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee00f46bd1f42ddfe316f0249950dc51ed06b4b7524c587a612c047fcc01a6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKGZL1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25cedda0bb410f0d857f03b9f4102b44efc74d723b268c173592a82e441e624. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKGZL1900008.
Nick Hart Sings Eight English Folk Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58a661591adb51bb9c799f4252621c4f33067dd3e0913cd13ef0c39a7db87f9. 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/UKGZL1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79ee0c6f30e8f05f77bfe74a88b5b27a8cd4bb10f7e93618ec36f2de24fb698. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/UKGZL1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b9cc833672f46a5e7b9f902de24b0576b6923b5f478e72bb8ce0ef6e4a51d4. 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/UKGZL1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5190c061c3b645364f8cfe294ad5b0ba43802ed495fd769a77db1f401e6e163. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:06:15Z), 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/UKGZL1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd441b0169438853746b288afcab07a38f1bd2dba26079375a08d50ba1a2fa3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/UKGZL1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d0eaff4ba146c570d2d6bc513a4b7dd0adbe3c7951e0c6bfaa39913618620b. 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/UKGZL1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753619c897e8bc8454217d668d481fef429e77bde1fd35177cd969678ad33ec0. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKGZL1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32422edd44d325e1af549ec4b4da328d811a0718c2cbd827e4713bb7d01a219. 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/UKGZL1600008.
Stand Up Now (Songs from the Landworkers’ Alliance.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d77b83cbd0d788c4d0b1bed36a48181f74ee4369ecfce6c6b0d2c3b8c0318b. 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/UKPJP2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d16c0f9de0d9929d50b858a12f789312140a5d80a0b7dd4b6c8cc08ae23c9f9. 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/UKPJP2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe768fe5961bbaf490bc7ddf3a0334d3eb54407462abd14e6e2288ab5a52e837. 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/UKPJP2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1288e1865a095dea250ebe96363eb1ca4f2990b0556865e5f7e21a2289d752. 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/UKPJP2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2116219da2398259f57d11d778c59aa873aa3e98b5e9c2898669c49ba19972e. 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/UKPJP2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d044d94318908720d8cb0fac6bf9bc327530544ecfa2bc46e7b8f5988666e2. 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/UKPJP2100006.
The Trial of Bill Burn Under Martin's Act