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 0x0eae35e1f6790e6fbd6e2872dcf15e1208b3619311615bd6be880829d8a9d725. 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/5dab2ee8-4f03-4a03-9b35-a5e034a35472.json and https://artists.proofprofile.net/proofs/artist/5dab2ee8-4f03-4a03-9b35-a5e034a35472.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 0x55d63d2461da2446c2eae126526d85aabd8da7ebd657d3741c4a985b25273e3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUDN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3d21cf154b60d3a54183a6c649090e695288257c62b7477b3621c72178a420. 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/BCA2A2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea28b4b0d25e49bc2f7790ae938a55832dc2779cd2102d993726b019bfa9e69. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCA2A2300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905c8187613fb955086fde08af5acfe61eac7c75bcf8b0f6df4d1e6e99ef00ba. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BCA2A2300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46393582841fb7051e2a2b71a93ce067f99cb5b5d70c1c03156d9132dfcfae43. 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/GXBAV2307846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d761775f3bfc21f9b658d923529a026dc3e20cc49a21d5117e257e39a05dc. 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/BCA2A2300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a64f6a9aee4e814b0e6075151129b34a2baf90ece57172053e92bdfe26b47. 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/BCA2A2300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a716080af3683f6dd9977a3d1bec4a86da7a92ee6fbaa32423075a78e430e9d. 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/BKARF2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896971c959eee6c21ec2a8cbee155aa61da3c5c878211592c4135a9e2a031fd. 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/BCA2A2300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6adcbbf6035b510b8b282e0ba6d65f9f13263e62e73fcc733589bd2b9d358a4. 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/BCHFD2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdf4f186d644e42e3596ed85725e2b302c5b65825cb17d41a0f490870df410d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCA2A2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0630ddfd36fb42d3a097a394ff822d175b4a391ae23634339db17dd570a322da. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BX4IU2326378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ba42408ed48a3379251d4812760fdb71a2f00999472115b7f1b5f2cc06f81. 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/QZNJV2307471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a69e1d2b62f949c850703d81055c63b403d2499f838de862568928e7695e87. 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/BX5EU2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529567f2510414f5e70924dabd82a451dfa9a66fddb41a2c10258bc1d0289d18. 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/BCAPW2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3edfffb309e6d292efabd6296d94e4ac4a4957dd4c3a6dbd0288f2d90bc9582. 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/BCAPW2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43326fb1e8bb023b68292556060508a0bc066fcf1f97f2ceebe7223b8933cfc1. 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/US7VG2370321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d82dd4f517263fd04d1c62d4c31aae1a02d725dda720deea017bfdda2e85a4. 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/BCE7P2402000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22858d9d0bbfacd9feb97bc4e9d8040db48c6d82c4ec135a368ce5416605b178. 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/BCE7P2402002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da975944ab1ed35b0b4654981c9095a91620fb3a14d3e3fa028eeda216a651. 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/BCE7P2402003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85733faef466dc76059764aa0ae733c681d0395ad8d2fbbf26caa655c21bdcf. 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/BCE7P2402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe366e9a4647752f1d809c5293de2396440d695ffb0d1cbf75cb006cd5e3cbba5. 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/BCE7P2501151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d1c22da31ec148611dfada96c7f4bd47f252e79b3df3ffe24469df45661a1. 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/BCLWS2301073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83f76c4b9dac3c3054065a7f7bd9a8af1ada93ccbd6297d3e0355350cc32af7. 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/BKCMX2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c9fd7db080105b14bdd8b8c5d52efe476501591a0049f21958730eafe1fcf6. 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/BCE7P2402742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c504a301f828e6ef05fed1ed6bae1a36b85d48a36282382792e3c72152ca8. 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/BKARF2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf245667dfd83ec17ca55b982e53b1db24de1d6f5432934d25813711cc6005d1. 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/BCE7P2402421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb8c601c5d6c20abe6087d168d4d1c1252a5b5cff851660724e7461be0bbf8. 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/BCE7P2401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b604d34b796dfca7bd8607aea3a22ed7567b9dedf1e7c421437056f0caabf9. 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/BCE7P2401987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74141c3bc243a4f90742e32f2a776808efdf6b4098b7fdb89007d70baa79c752. 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/BKARF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f90c65fd42dc8a0151175612e1af71a13db8abfb5a74fdb17c77b01a58163cf. 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/BX0BA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b677a291ff6d93246be89ca26a694b617c8eff6fc824c4427a27d0135b7e9b. 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/QZZEC2302327.