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 0x5348f0e41aecaccd37dc6dbe663873db4fc6d840dd2caeccbb75afa6a2626781. 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/d1bddb36-a67c-4fe9-90dd-e97222c722e1.json and https://artists.proofprofile.net/proofs/artist/d1bddb36-a67c-4fe9-90dd-e97222c722e1.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 0x63a6123169a2784743a488300cbcee9cc585ec74159ed76908be0cfdabf96241. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ATR980017178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39718eccd0ce55ab40d70720652ac3d42a57fddaa435d811b5524dc137cd875d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ATR980017180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca685111e1d674299c609d10b85cb35eb96222b41bdacd7a3f0c6bebe60d1fa. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ATR980017182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa352df240fe4b799893556137121a3b9852ee3f8ea7c825aee13f28dc026ef8f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ATR980017183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d51bda5f1764fbde419281ad1bf7da847e337e8ac01c7ef2e8a36df18ef9d. 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/ATR980017184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f346f8e0219ecb09dc1d88418bb3bb6b7e44b42f0db5c15d74ad8500e71e7f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ATR980017186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca91410e10735964378586fdec49d5e16751e7e89d6777d47314cac26919d320. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ATR980017188.
Medley: Ring Of Fire/I Love Rock And Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14316eb4aa23e8ec849c0eeca82ac466719e13b70c0e5e5ab614b484cbcc1b8. 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/ATR981130997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff98da049c6482c1d13c0ee75cbaa34295166397e7867a5c156c385ab32d0a. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/ATR981130998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a8fc69a0d0dbc7f6414496c4c9c0e60ee4b40db10426c0f3a798bb8f46ca82. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ATR981130999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997cfa19278929d8169ce652db4aeb6d9d9766f50e3c74cfc2aaad732e293c83. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ATR981131000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ede41cd6c4a29edcbb73605e19c6888a1ae1a26c677d840a3dfd6bf029627. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ATR981131001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b71f32cb6fe1796bf82457c0283a5312b875d8d174f8e3d096dac96c4b4bc18. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATR981131003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebc3d9746657c16330303f47fe87da7c606ca64906813a3c571c03a6da741d0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ATR981155445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cd21d25dfbf9c6b7498c0b3098b66ab98295749a2421ed5ae7f738f81f7e50. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ATR981155446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a46d126a40296d21111ddbeedb523d884531f4167fbb3418bdcf8a3a0d4a3c. 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/ATR981155451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c1dc2db65ee1fd2cf92384ffce6716019173e5b96f8e55d7b7e1625ee77cf7. 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/ATR981155452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964ef6b8243203f645ca1f26be8d3e7f7d42130583663cadf7c240028d1f3ee. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ATR981155453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cf45be27c6e845b15afc4720ee6dc6d95718ef05e9898b6e039b95a0e670b6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ATR981298197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342186e1fea193d41b2fe94d1344a00940d58afa3e028d9c0fe08aee4067698. 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/ATR981262016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b42471153fa4b15f04fca35586dc4b300b10cf9106111ede1742da196a9136. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ATR981262017.
Killing in the Name Of / We Will Rock You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87de70e4da9207ab9ebadee515bfdd70cc9c7a7469c9a8c2cf8664799e2b3792. 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/ATR981298198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec03343a0e20560dffb0e63b9bf473e886b5a78c9664175fb7e3638702f04951. 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/ATR981298199.
Self Esteem / It’s My Life / Bad Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84561857d29a01a8f701e31e6bf7b1e0d1404d4301de19c62aff4b5dc4d5e98. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ATR981262024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8069e0dee116da7948f81924b12ffdf1a1b26847852ad4143eea856a9de4a257. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ATR981346437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765ae427a456f8edb863ed1b4b6db0ec4ae93b981be0682d537b2a94bee07240. 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/ATR981346438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520aba45704e143efdb5922e01e4b4c4c934cc4488db6e6527faec953c3bc0bc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ATR981346440.
Fear of the Dark / Hier Kommt Alex - Outro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e8784eec763d2632b9380f387a0e7125e5422738a64040632c62e1580446f. 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/ATR981346441.