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 0x51f22b2e496ead1a858f20478452803fd0438e4fdfee82fdbf05e98de44e7369. 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/917ed0ba-1252-49c3-bf24-841dd22f7582.json and https://artists.proofprofile.net/proofs/artist/917ed0ba-1252-49c3-bf24-841dd22f7582.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 0xc3cd936a302ddbb5c6172fd498d283ad32025c2c0e34624b464f82946defa7f3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAFX2135849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa4d5bdead1c985c3c5b878263e49cc9feffb01a3b398237af19bbd84cd6080. 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/TCAFX2135850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb820c9d6e625ba762f254dadb49275017359b526ed6555d9edef0334ed6fa18. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAFX2135852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20058ba2da4a60ca3c9c4ffa335de75047e45fd1688faddc7bb3b973cd85e453. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAFX2135853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87447f093c7c0f1d036546f80f2692ec9ab20b011127dd06e21236157c261ec. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAFX2135862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982a47483da13fb48ad4a440c71d6165101fda949714b4d33e5b80d84eece570. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAFX2135863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b59aa54901609637fc4f199c3e6644c29d618d21c20a76f6a18b60dd879a2a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFX2135865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0ba45f660cc597f8768a4c9e2898443bea7b72616e9f33c87e3bfbe75efc3b. 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/TCAFX2135867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7508a7f7dd660f98c5d92e424b90d20fe99e115a1af554a3e71ff196ced2502f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFX2135869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710c5d9e29f9dac64eef77843aaf926346d04d9ca40ea36877e5a8224bf01a7a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAFX2135870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e33c964968f20b3738e6a7283aca339b174529a84e9f58e3dfc8801c12a04. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFX2135878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d32018a838da9f20fb7d8db44a9aa6bfc7aeb3f8d715068876b08b3078d116. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFX2135883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b2dae8cc9a22816ac421654803a97cebc6a788b60fb6f6a4646f8ac76bc152. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFX2135885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f4cc7190a0c92faf19b74ca262555178983f99659123482f7cc203750dcd1. 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/TCAFX2135888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a278960fbda1f7d5587b370ad61b0782cbdfafcfb07f0848be3c55f9385223. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFX2135890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc8437bae65150884b57f842f722f3d5e87ecab1b55d1595877d44d1df36b5c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFX2135892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01de067e865d60a690cb93718a3934bb49ce368854ed27f94f3bcaf843bdb8d3. 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/TCAFX2135893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9441f0079192ecce13c10489d4c2195b1d03228475676a004a317c40d9a8b8d. 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/TCAFX2135898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06f57927acba39a6ec1851fd85274517b0912627230606ac6f9e0a643d09681. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCAFX2135905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc199bd883f282baa0cf89325430847ea12c131b4e058f9a3ac261e51492c4eeb. 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/TCAFX2135911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef990042a56991f7b32fcb5d95d25ec70eca4fd28dde77d3e5d3e3623412e73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ2579433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2bb68c0c9ed612f51b32e2ed4211e5ad1d946714c51e852a173fbc9b28a4a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGJ2579436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072252ba99a4133d65869846a1d4fe46169a9e3ce1904434f371ea7150a3c052. 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/USCGJ2579440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e5171dbff45d91351103a8503570172a77cfc89e89a03b11b05057ff560653. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/UKKVK2100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5c5466d2d474ed9153c3f2962bb8010c9023280a1e9c4d39884c0787f48d51. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UKKVK2100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc471e50602a9de5aa2983890942d1a0eb950ac886809b311a35d1173e70c665. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKKVK2100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f158de929a8fc7ae995ff8d7e836e8b34819546cf9299ee3497120f6f8edc5f. 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/UKKVK2100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2340f982f2d545819aab92f585d175187454ae2e8211ef475b4523862d7218b. 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/UKKVK2100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a065e393f5d91345970579a414b2a57167af3e2b65acd374eaf0a6165da62ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKKVK2100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577015ec164087b5a41831cda73f780239a454734c6f2603310246344835d792. 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/UKKVK2100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdf0247a39aa102cc8e3b4e43ca8927834945c7b4a4996da732ba1a85695e08. 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/UKKVK2100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e90d6bf2437c022ac702b44d1fced54bde28629d95c62708493f57c5bfe304a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKKVK2100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a831556d645249ee72ff6137e2ae29c0a04b09c436351d1f18fc5b24c92c625. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/UKKVK2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2993da63da516dd0aed788f2e1176e59d2316e97249fc55ba3761f9a164736. 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/UKKVK2100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d03a1a37a723b3ab532ee10ad91fe32c7897f175c1a0bdae981056284c8070. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UKKVK2100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669afbd34ac5257f9c7d009a9df362fd8fd5bc4fd84d3e72f8b2936d0d9741e0. 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/UKKVK2100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090bc486f777fa5846f4083830196f8edd1267935eff28b6adef5861cbd113f0. 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/UKKVK2100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2883f0d1925ca99d217c2c417e1ef7c823c7fa4048d23e09ad422481f93478dd. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UKKVK2100178.