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 0xde46d6a709a82f0db6736d2238745b0ae6115098f83716a8f9be6db33aa2cce3. 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/3200a9d1-a7ad-4d6d-910a-69393a4220d5.json and https://artists.proofprofile.net/proofs/artist/3200a9d1-a7ad-4d6d-910a-69393a4220d5.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 0x1158abe7387cb2e3f16983a7882fc26cb5f29ed360903c68b02fd2a9a9f9e22b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZPLS2012990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1933da178a377cbeb763eb9c17f77efbe3c9018c108f3b25005071181cebfe70. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRS182168282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f23a01d118bb5c0333f5b65a3a199260a8943758a3ded4327777bfc222836f6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZZ7P2436194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92f81ec2d9a0a39ea9009468a26aab345e00daf8bd664b1144c5a8f95f4e35. 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/DGA0P2375329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a161f83920f077cc392f6c616c1600be8a93b5dd8f6627b510680bee7eeed9. 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/FR2X42448575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411da034d7ba690b2f528b9c1736bb20ae33ff589d21958294f8c94e19eeaae0. 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/FR59R2497269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85ebf69233564c9db6f5f813537d6f25ccbdbc1606574c83f8b218e277bf1bf. 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/FR59R2497270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa059fe3beacec27aafe7a10a3bc90792deda7bd7fc83153d568336d91a153096. 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/FR59R2497276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e772872ca02d33bc3217f08a3f0bb3464b9f1cd8c67936b2596558eec1477a4. 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/FR59R2497272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8fd91d5f0ba1d0f72c468e4154b5df4618c71a0bdea18fb93ae59f3b223c23. 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/FR59R2497275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b819782cc5d7d2a051f1644d07bc8089dddb84fd888aab958250c8adb63a08c. 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/DGA0Q2394928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898aea86648e8806f1ee9208e52bc6c86857d9c68db45ed634dea452deec333. 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/FR59R2497280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd2c5fbccdb83cbbaf31974fe221abda1017c8408b48ed74d6f26edb878d59d. 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/FR59R2497274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6cfc1abd35987d50b0c92253588a87b0ced5e5b2caac13e801a754780d6a14. 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/FR59R2497273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fe8d5b8ce392e00f3fe4d61422913c7392e9f8fa04165da3b1bbe69efe20d4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR59R2497277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9106a76e8c4f453a0689056525c15107a1732a53a3cd7140f2b3380826196f. 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/FR59R2497278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a161f83920f077cc392f6c616c1600be8a93b5dd8f6627b510680bee7eeed9. 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/FR2X42448575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b819782cc5d7d2a051f1644d07bc8089dddb84fd888aab958250c8adb63a08c. 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/DGA0Q2394928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92f81ec2d9a0a39ea9009468a26aab345e00daf8bd664b1144c5a8f95f4e35. 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/DGA0P2375329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b819782cc5d7d2a051f1644d07bc8089dddb84fd888aab958250c8adb63a08c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DGA0Q2394928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92f81ec2d9a0a39ea9009468a26aab345e00daf8bd664b1144c5a8f95f4e35. 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/DGA0P2375329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b27eb70f88969fada224ca2eaf03bcfcf7c055ab6843587a1cdfc330cdb2fc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA062215862.