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 0xee781ec15bcb51bade2eff69dc5e8df613104a74be5c43340d12875ee77da69e. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/135f59f6-462e-42d4-aaea-58c805fd9da7.json and https://artists.proofprofile.net/proofs/artist/135f59f6-462e-42d4-aaea-58c805fd9da7.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 0x54780da291b2306f04e8c94fb498555a6cdd59c9442fb16fa720cb54edc5b989. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX452226089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ad971d80fde383bed254ccd41da00ea244a5aee5986efd142f8be60c24435e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX452226090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78691271798614617af169563c5ada796833ada45e1cd0d8c6ea0ae06a681317. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX452226091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987bf1a902251abd138c3810955ecda2944f4dc3b3aa7233a55859bc25bbce3b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX452226092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29f19e7c3c2c976e8c13f875a52ef162d9c1fed7efdb2b545cb5893281351fc. 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/FRX452226093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f21eb5ff6f2230b7e4ef4837e5c38abeb349a48b3775970c3cc2c8cdfd2e9b3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX282279413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f748b058aaa39ad52ebb6a69f0accc12ae317962a711467f800d35a04de05a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX282279414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3b16a513f252a36630a309fb066553580008559452a8a5bd3e8d9804b25d2a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX282279415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c55e37560948149534bbe4a31acfb41638e47867f4d0b474220cb936f39305a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX282279416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951229a40d51c6a2583ffd9c9a84b74d676828bc19be38ed3ef5270a56761ffd. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRX282279417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe95fcd0fcb6d064e415f32c2bf8cc1a529f2e4110f0619ba35a414c630d2757. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRX282279418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f66723268b1b52435d4c48a18c687faa8002229cd2e867eabac8e3e1582844. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR26V2010620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2762b1a1d459357d88f6275441b7033309add3959fe337ce9883922c9b63f06. 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/FR26V2010621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170a5b87ef06e823732bf3b3446eb341a05257801afafaf2053aa8b4929a25c0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR26V2010622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5ed68dbc21fc3164824ed9450cbabd2c017f01f4b0868c6f87f235c64ca3d4. 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/FR26V2010623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b59c0a6d03aa2d3890c86146af5958a922f39b020e337ff3be233701c668ea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR26V2010624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d740d89148695ca2dbf8750da5a8ad312a9b60ba717d3360687a7b9f5ee34d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FR26V2010625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57969c7687ee750114168ba3f3db031987f1d540fc4ca426fecfa5997366df46. 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/FR2X41955924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32781748afcfb0700f054b44287edf91317681077d87b058daa07b20594761ac. 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/FR2X41955925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7e5f6343705262f776ecbe0669c38a5a6642113c5fb79692a0fffbe0e30765. 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/FR2X41955926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9335a9dc3979121d3ba067546480c2cc8facb695484516291dfcd1eaa0a6c953. 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/FR2X41955927.