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 0x6b026947af282a0b98a877e1b6c6adff4ef080b36b34379c7d1fc234b02869d6. 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/8974143a-3d86-4037-b70f-db6329819709.json and https://artists.proofprofile.net/proofs/artist/8974143a-3d86-4037-b70f-db6329819709.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 0x4e2476f0a38046a2f97056d560b61bada27730ab4fb96a5ed23d16637ce8931b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCABQ1352574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e7807dce4fe3c0ae3a1ecb0befe95d75148045128360259ed9f2cdbe96b6f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABQ1352576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62394a5fc77df50d27a649f240b61aadfba4e762f223fefef40762c7663f987b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:23Z), 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/TCABQ1352582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb89fdc918fd21fcc66d7f810e6abfcbe2a2bd23bcdf43d0ea3ea0987058673. 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/TCABQ1352572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2476f0a38046a2f97056d560b61bada27730ab4fb96a5ed23d16637ce8931b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:23Z), 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/TCABQ1352574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e7807dce4fe3c0ae3a1ecb0befe95d75148045128360259ed9f2cdbe96b6f. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/TCABQ1352576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62394a5fc77df50d27a649f240b61aadfba4e762f223fefef40762c7663f987b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCABQ1352582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38d9af79c00d5149cb37a781c9afcaa59d12ec05360b0319bd652ca990eba4b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:34Z), 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/TCABQ1352584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb72ef1c335ab588377789b09f9f5d641ee44bb378f447172ebb92de30357774. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCABQ1352585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dccb2075cfc4621ead14c48d85ebf3ba1c2bfd4aa468bad6eb3c9d68f338bc. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZ5AB1605559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb1d79893634e95bc45984254b2e9586930302fb73f93c7f67fc8c46a91d9d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZ5AB1602432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2671f4a697bd311d15b3f4fae354597dd26a0d60a0d192457356bdde9a447976. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZ5AB1602433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e9f764e1aa3d6a245340e5ad28a0c20a1d8ae609d4fc62bbc06a5dd49020a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZ5AB2005216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fdcbc7f496de30f5a86711feea78976e1e01bafafa5c3fa7eadceacad7754e. 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/QZ5AB2005222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2465d325035957eebfe324bc1b3878acefea1b6ef6e0b2a67bbd121bef282a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:38:04Z), 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/QZ5AB2005223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e9f764e1aa3d6a245340e5ad28a0c20a1d8ae609d4fc62bbc06a5dd49020a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:03Z), 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/QZ5AB2005216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7494ea5336878844e8c3cba37ef79da077e9e042faa685db40ef47455636b034. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZ5AB2005218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d43a7c1213a48af6e6787421dbd999f1ec194846dd1f70ca9f011db4701831. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBMA21874464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ffdda00eab5d1241d4261805580f0e8b6d5efbe9b21dfce0611e1731fd7b9. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBLFP2045855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf1f430ad8dca428b07397348c5d07bf92a463926a7f29c66e99309f5fc6057. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZTPX2338264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ab9a40521ee3ca4d9166f53ac77744a40edc65e6ee017b489f49a92cc986c4. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/QZTPX2338265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc97189ab4f7c2ba651bc3a9f3bc437ec8814b192f663a7b55972919d8ebcbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG2332592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc035ae2be900f9f1fca7183d00cc19c4b43abfb68914850ca0ce047221c7aa21. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:15:58Z), 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/QZNJY2365767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2887dd0849fa0632f92921aec5680b7e49995b3381329dcce10edced81d0f3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTPX2338266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c303a647f8c4ec94629e9f02e1a6c5b8f800c31f86cac4bd1c6cae7bdafadff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTPX2338267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9eb4711ce02303e768c2556a331e06c7bf88d8ebe73e4d6e3f75d316f2dcc7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNJV2362900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f375848505cd0d180e580e440deb425e59514f2365fe5e38a0efbac7eda1722. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:28Z), 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/QZTPX2338268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437312d493a5cb2c643e4bbe9d231c3113ea05f1d2310a75e12dc7a930760c1e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTPX2338269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf1f430ad8dca428b07397348c5d07bf92a463926a7f29c66e99309f5fc6057. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTPX2338264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441bcf11daa175b8ccf452011d0d39d2073823c4a3e7ef5caab9d99b1620419. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZGLM2433007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedaca0d565c938a852c361f5975e5bef8e40864a9c3e86e269cfab172af391e. 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/QZGLM2433008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399eb4595db211d66d38726898a42143855c040c0f31ac998cc771b90e651eca. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZGLM2433009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2a99428672a81f2c92c3b999200cca2d7664d4b8e227eb344334d66911fd36. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:03Z), 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/QZGLM2433010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9807408aa92ba246ed0ee2bcfbc509e43c83fb1a29958e74370a50ebee3ba0b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLM2433011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f49c9404ca3c3448260b1e43c435ca095aa6752275e85e4b1acbb15519e0d8. 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/QZGLM2433013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67f6461de75d2c1dc6a7f766857017630108012ada7820f47973295ad64f66f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GXF9Q2498714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0a643ebb3f8a8c8e4a7bf71b7aec22558150e5c3ef0f4cb4aff1486e1ab94. 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/UKXN22565382.