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 0xcefafe9d412eba53cddee1ab592f8501e269767dc45e1e8bf58babf948cb68af. 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/915f3f88-03f7-4fa8-88a6-e0d9f4c3dbac.json and https://artists.proofprofile.net/proofs/artist/915f3f88-03f7-4fa8-88a6-e0d9f4c3dbac.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 0x438e22e0329aef90728a4045cd700ab3d17e9a717f2f78d922703343c0838b84. 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/QZAPG1775884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc437f090e0bd787de602d51f4ef1aafac749920f3760100dbe9038043c17f0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZAPG1775886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aee6bb4d0d9a2075b38e819c66bb1f15688f23beb28c2983a138c1a2d7ba83. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZAPG1776348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15120421fd2e5215afca74c0e553706500463b5cc41589c2bae43280e36774d2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZAPG1776442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b39d1c134b2b3d2216fb3cf4d369564148ecdec8cdccd1c17ef4b2ba411ccc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZAPG1776444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac4260f5a98a52f6bba0935e793d5653eb59eb61d161397cf73bbffa40f630. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZAPG1776445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd735b9d1da31a9fc8cc66baeadafc4afac75784cd930e8dd21ee83d8987a16. 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/QZAPG1776446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505445aea09e50ec29671b23ecdc218bad0c1020b087b1ef5c5fc92fc30792b5. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZAPG1776448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8798250bac09877899dc13c16b1f82ba1a46c4bf3bdaf832e60f3afaba7e605b. 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/QZAPG1776576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba3236bcd9a83d43b6b72e3e02eba88c8f53da58d18afff9b248dc814bf04c5. 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/QZAPG1776577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a5654dc9b579103b65a189dda49565fbdcd4959809ab06b060ad001ee7d31. 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/QZAPG1776578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc25d8fdd441db44cf08d34424757c4ee5cd30c3898e2a6a512b414753fdffd7. 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/QZAPG1776579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd8fb6902e14faa0b773b2dca960309fef3dd779d09535a8f2bd52acd5e9644. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZAPG1776580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd1827b89edd96617b43af34bbdb3de8f95ddd41f9168220f45cea5a9947b7. 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/QZAPG1776581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3742535c2f231e16852147c77fc727f41f087c056190f148a4f7c6fba946d. 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/QZAPG1776582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591b4b228887b9fb639cd9d01e9e1a809911f6152f40be046d1babcc00f3f430. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZAPG1776583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cc444051e84bcedc5bdd4a82364374fe33668a1e242b2f2778a6495ae3294b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZAPG1776584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc4a9741fb537fb6e194d3760d883ec0820563a4a619fd388f56c47d488665c. 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/QZAPG1776585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8693ce03cb2e61198e1b9e26d3783af7c9d6518849da8c5afa86a5ef445ed721. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZAPG1776586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67c58a5f7f995b7576b02061f8a060ec56f01f0cb84310163b8331c66aa0176. 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/QZAPG1776587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a515d174f368c0a47068abba7e69aca390815798cf3f27cd4a45bc2d9d90b3. 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/QZAPG1776588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c547ba8305b331eea4325788c00d126d82b83cab3a93b7d1f38c20206e8be2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZAPG1776671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bdf64382f1fa791ab86f181fddc4cc5568b6e54daa0dc739a801f30df774e9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6P2067705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06f1d4e596cba4b4c9ede47e9e65d5ba80ab54fcc71b3609727a2a4d8cdc87f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZMEM2077406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d80ad0fc4010b1907cce9a03c28f7c6eca637e3875958b02011387a7cd6a9. 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/US92U1800608.
Choose Your Own Avenger (Mighty Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2702a668f925b7939225cf3bc6f29c33f5d6a1bc2e6af8f2ebfa1c19f53d45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAVY41800069.