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 0x75d5268690861fe82681da2050075340d90b2a6ccd04c31affaecd2b7f5771dc. 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/079a0293-80e7-4ce3-a9dc-37aac89df301.json and https://artists.proofprofile.net/proofs/artist/079a0293-80e7-4ce3-a9dc-37aac89df301.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 0x81100cddbd4a1120902aeab2ddc0a313ad5bea089e55e2e2234dbb9efb8f77b2. 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/UK6KW1800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777e1898d5fd91b8c7d96ae6626591e5152f7f0a9a3b1313f4523307cec440fb. 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/USHR22315405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61b380d633060bb406f9da002bb918bfcd45fce162814f47027c9cd89b18dee. 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/USHR22315402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc29d123ce8c94d324065a4b224c419037c13338b5e28d9f2f0e7fb642f6141. 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/USHR22315404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9878b5c9b9376d42bdcbf3c2fb4ddef3a9d02dbfdaa48d697069f2b473f72363. 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/USHR22315406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe572b6da076c57079983537412555eda477c759ba5a89d283831b52757ba68be. 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/USHR22315407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ac49658b1b63698f69375911e9d7f3376e6667949d4e9821aa14ff130037d. 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/USHR22315409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c990bc12bb70151cff25cab5ce144dc1c4b34516220d4a055d31b3e2ffbcbc. 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/USHR22315403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd472c8bf2c341b712718b8d679fb77a62149dd63de5e875d0fe32d5d1156762b. 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/USHR22315410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8564c5ae69e3ac4af5936180b6f018a23dc35458bfef8c5a722326a218687e26. 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/USHR22315412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a18b6060823f552785dbda7aba9671e661966269222a556a169196e864fad6. 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/USHR22315413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f753be36c33ad525c63d7b73b8d9e6e141dbc152e8224bd02c99a1eb239968. 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/USHR22315414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa4bf88c8eeb5bb742a296cf36ed542d385c4bff8dc77cf30a2e4d522cf7505. 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/USHR22315415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a11b5ff7b74c3036d4f7f8bdc08d27adbf6bb289c8ff85faea071f4272b280. 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/USHR22315416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383fe762ae571fcd220edd9922fa90f28cf6336028cd8bb2af8f25ade5428b1b. 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/QMGVJ2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6608355a7f2968195a943ec757560947b27f512e25c069a62daf0bfaefafeeb4. 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/QMGVJ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b04a9a664929ef06ca9734a7985811292b5eb17d711b7ae8b5f7ec9c02da01. 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/USHR22315401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8364fc91361f14ef7652c1179137d39731d85626cb49ab5793dcee5a4a1a0. 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/USHR22215406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3d0804305d96f34d42384cd95131286f4ab57717df9b6b684f000b829aa4ee. 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/USHR22215407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa537e0c91dd9aacd7776263486ec4ce32ceda34cfb3550adaa3174d7628fcabe. 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/USHR22115402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e83e53a6ede04855cfbf5787a0ce53fadfc3254b7ac4a38e3d722e05b6b61. 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/USHR22115403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f32682fa83636bcd24991a563601f746e8e833494ea3dbe493702ef0ff880be. 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/FRX762018128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb570ee3af3ac54ff5432b6fff89d800ae6ebcd0440e2e9e5b158ed5e83a04db9. 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/CACB11800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ab6b1fbbcf4b7fa1a7033d2c88be10c56dcc9ef9f0f2a4ef597b47ec239807. 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/CACB11900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10cc5798089587eae1bc2ca6b924db1a20d84a4637d2ab4d811594b3c9b8f5e. 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/CACB11800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda480cea8bd55dd6a06e302b1ff4713d9e4e93b8531fd14a80c5592ac94632c5. 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/CACB11900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62819bf64887264e9fed1d03edeea5e2c9a8810c6053ec17cceb7df41cc590c8. 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/CACB11900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1743e3648b34fe1ff91d5f062901c53c371cd450f65d310b009e1fe2de48df7d. 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/CACB11900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d47f819a605655f0a6678a8c5b849374c6615f7d08f3dd94fd232347e38c0a2. 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/USHR22415401.