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 0x802d2707301a98b3cda479a107231f9ea90e7c3fceffe038ce1da4dd27a820be. 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/3e70130e-89eb-48d7-ab37-6f28c3a07c4a.json and https://artists.proofprofile.net/proofs/artist/3e70130e-89eb-48d7-ab37-6f28c3a07c4a.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 0x5eac1c0fc3c8ddbe287629dd00344bb06b8d0adc0e1f08eb8d4fbd9d833fca4c. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZES62060431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b87d942048b1c1feafb250b5552b86d4e56c6fbcaa509d8b3d4c848477a0c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES62060432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d8548ebaa8db3370df6a2288197f7789de6a122dd66820445f787e94ca595. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES62060435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7191d4e4bc4865fdd7bc28d3e8b278d37991a511e9483e79ca5fd1c60c166a05. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES62060436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee361c8d4cc1056a27fd5521c4fc72e8e3c33f32ed1b3f03dca37c963ae6bef4. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZES62060438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae08eedaab2acea3c5701b6f60dd0ea5d31293c814717bcad1621e49d070d52. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES62060440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b2f4ba56ffd305e7c8798303f4c42d13e8d73bda6c08624b4c2223bec5b9a7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:37:13Z), 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/QZES62060441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555c984a2f8455c98206493e760de4662fa3ea8a23122e00f20f366ab502921e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6M2021412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb56c044219559bc510977548deda6d333f557977baad5ed053de028451a0c4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6M2021415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a57b1927ec059dcf82cc203d7103f40f54c15e0e971e31718ecf23d7dc422a4. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZK6M2021417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3bea89c7f7d0144881e291e222a3b4ada9ef62a95274b12d21c339085dc35. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6M2021419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d06a66a590a0e8876a2f6f9a7dc62883a9fedaf0a3dd72c8a6778a30165419. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:15:53Z), 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/QZK6M2021420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97f943c635b336dd132c81b9976de3df172f5e58e7a1de51850f3a57274f54d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6M2021422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7654e90450010771521a0599da050bb9bf4e7c1e1842184d11dd3f9483374a82. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6M2021423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e0364ad535babdd99ae77e803397860389c674a3d4b7fad74de1de72118bc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYW2179013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc7bf73e665242f74f10597c8a40b7edfbeae5269a9a5c2ecab762e1349de1a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZDA72215185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f75a78d473f39502b69d4ed3c8f405b363d35f66e5bbc0442d5de0493717e22. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA72215188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8055e1463d2e8cdfa627a978b8f7a1390dda7215502a54ea971df057fffe79d5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA72215190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e734291ee822ab74c173e93521bef67bac866e4c071d53e0615916f2351d21. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:48Z), 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/QZDA72215191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b12a05530cd0ae83ad71d8ab67524087de35fbcdeb4149c8b5c26c6a67b516. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:58:37Z), 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/QZDA72215193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837ef77df0a43c7c8bc543a976efe7199cd7e64a994546e29b7ca72478130b96. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZDA82367073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc2340186331b17283c5649103ba685d8110be34dea63db636d9f609018fb53. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN92300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecde5db4139c66aa7f0b0e9e7f66c9e88fcfa54d8a98bc532ae90a88bebecc9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04f1344983e3193946d79eca385ab32060eefeca859a73e2753b6b2f7be9f02. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZHN92300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a862f492605876fa483ff20019f226e1cdb7db7969fd43dbe01d5bdb6954737. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:10Z), 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/QZHN92300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2635c26c95fa08bb5c79ea1ec0458250f118374f5c8bc43f0090f268fbf596. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTBC2356008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9254f3bcc30a8167d15e2818889573a36daceffa2f185b15ba30a0d89a19c085. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6L2462777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46a08313456b15d8232b8e342e68fd5de89fbca0cf9fdd1c35af4372aeea831. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/SE6QE2425610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132da0e9fcdec27ae92d0602213b61121112fd7e540454d88e3c92a20508ac84. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6QE2425611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21782afd6e31e5afaf39ad80d08c8e025e1ce9cb65e513a8d20d2aade36b3039. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SE6QE2425612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201d53d8c90a9a98062c67cbe50782cdb3fee5706531f1974d4b4674eeede425. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6QE2425613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1db28ffdfa87ab4d82180001e2262a1653b39a7323b1387067585ad5301a16d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SE6QE2425615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7845862a64fdb35eb40bec06e6d7667b06847d9ba458daea3cc1a3fbf00eea7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6QE2425616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7838f94b172fa8536fb9a94680e1c92a5569c1c962c42292c4c414abc727dea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6XX2503219.