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 0xc6c26270572ac6ce6e5c1a99bd4d9e308c6c3435eae3e6ef73f27f73407243ff. 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/ea7ae158-52cd-4abd-b543-c2786f38161a.json and https://artists.proofprofile.net/proofs/artist/ea7ae158-52cd-4abd-b543-c2786f38161a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
When a person is standing next to you, there's no need to shout (unless he's a Giant)
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 0x868bc00490cdee0cf92e2acacfae8750cb52116dab51ea3086bac82afba1e655. 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/QZHN62353393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e22fb55e256ec5e6790fb7dc917288a117cc75c785a441c2e53cbae358b9e23. 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/QZHN62353398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c3771280e6187ce29bdd1f80ab75b90a51dc0fcf769f99db6f830e30eb82bf. 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/QZHN62353400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d17de65ef34c4922df314bcc16a47f21f3533ffe49141e56d8694cbb1cf289. 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/QZHN62353402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8cde2a40f45339d44bd40b484a09bdb59d79f0e09aedc46a485c10bf64015. 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/QZPLR2046086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7d5aa6459e6db2a9a99626e56c2a814bb9cb7b1deaad53ab61142e041a15e0. 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/QZPLR2046087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4919e5c31670ac20acee94f74cdd7cd2a2451e59db7b7c497005c6bb0a29be. 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/QZPLR2046088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce61120ecdc88ba1ebc1f4893a2e3bcaaa1f9a5602c98919efebc665fc36b6b9. 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/QZPLR2046089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bddab935b2d8e87d7318cac975ef18163601c51573fe5963279ff5f10814cd0. 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/QZPLR2046090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a579187f410ed98bcf220ee784be5ef391b4efa3571a08e56715f89130f003. 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/QZPLR2046091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332bdc7845509c82e5cd9a5a47ff873dccc08586f5f17be63237f3e563e18b11. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZPLR2046092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a90a5f1d693bda4b9fd6b7861855bc7db2e0fed8ed3dc592f82ccc988535d0f. 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/QZPLR2046093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904490b09703842a7e68e67bcbeb116a0f4a76b289a9816db7f7a07eb1ee3ad5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPLR2046094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718e55c87cbe43a602199c2400f851baec34e9bce0398808f6a956f8de50a64. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZPLR2046095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8414584ca51ca1f95e8fe382f234105dc55896f39901dd6700316b6ee7adfc. 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/QZPLR2046096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f44c326cbc81fbf7237c33fe12d3747666e5279e3f40d296e06a4cd6f6428b2. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZPLR2046097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0317d255b2339d969ff77306ceee89685be61577cf731f5c937fe5cb09ea71. 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/QZNWW2336238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032686773b7435efd85778156f2e3ce0590dee81ccfc4fa96b4e1d3df5a4ef97. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZMEQ2274321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d042fcc873e593d231d207b3dc72b2aea2a05c460b21061ed2a006b98207f9. 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/QZHNC2247802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99f9f170c6c22cc26dfbf8d8408f064f620e9051fbc71b14d717ed268c6648f. 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/QZNWV2078735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5286ef624719df0d4fa170c328e1fce2ef57299926b4b07cac4dc5ce1a6cfaa. 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/QZNWV2076917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d9413df9d18b96f6dab13c52700759690a097123933699db0cccdfa227c112. 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/QZNWS2039249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c46d21ff36cb71ae2005666db4a3a6d16600e91281df6afde5c6a2dcca4ec82. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZDA71967597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b5faa5708ae634360ea9a8236188c72d6a94bff13e0d038cd0ed76ccb05c62. 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/QZDA81861181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893ac862fd5d5fab5fcc5e9d1da5d6bbdd6d225abaf04f80a0aa5ce5cf57218. 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/QZDA81861182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8347580b2a6d22128eb5e29e623aecac3f1810eb12ca34391fae701dd5c62b5. 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/QZDA81861184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194c6c7e710faa4bf8460f22c5263cfa770e40e5841edb2e7076f5f14958ac71. 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/QZCE61832645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c23a746864304a6326884b4ed354ea9b529b999cb076c26833745cae23724. 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/QZANL1768098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a83e0fff510ceb19be99a3d0720f4c68ace90559cbd6d3481aaf09fef70c7a. 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/QZ4JJ1748260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ab929078882cc49c8c5f1b7895a44e139a70720eb1e47abeb2f47d93651966. 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/QZ4JJ1748261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7eb790c66f7acafad3897680bc7f1439e677fc98dfa2a03c06737832a99be3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ4JJ1748263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2091eb68efceb13a676ab6446d2eb30f25f6b85b99b13fb996da477f1ca4902d. 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/QZ4JJ1748264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33d05d1495a9da46567d30a4ee2f2f17e47fa6de999d25945713b8fdd92b121. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZ4JJ1748265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d8965dd2caddebd00313ef04b52de9e59ad2252f3dc307fb6e2e03922aecab. 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/QZ4JJ1625020.