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 0xec31dc677a4d1e12e006914072b9b1f01a78eee3fddcc2ef7a677a198b105ddc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59b1a28d-7610-48b3-8b3e-08469337f7be.json and https://artists.proofprofile.net/proofs/artist/59b1a28d-7610-48b3-8b3e-08469337f7be.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 0x0153c3fba47d5a219e7c4af0fad21daed137e59686086541e3fa4542142926e0. 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/USDY42257082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf21456b83d7abc8b742ad94795d23f366069b5814531ae0cea2a482f9a123c. 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/USDY42257085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7c047b28520332ad03887554e8c0ee6be722dfe9f5ad9bb4590f5fc2289220. 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/USDY42257086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ecd057476bac1ff784954fd33b085d6ecaea6471dc2070bafd4b63cc9c4bf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDY42257087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc220e3b72ad4a55924f116414adf17ce136d34a7c13439993252ea51c066f0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZTAW2289322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8842558ae3f0cfeb93671e7500a47f50170b114ce88a515e41a14ec5351931ba. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZFZ72285595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd563b430181be2bc96ca34ffe908268fb0be1d50a180a62362f969d7d9977ff. 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/QZK6G2195051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80421a2627731e9f0e5f470cf44cfa2127d78ff5f5491facd6f57f56ba3be6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USHM92139197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325e0e362d9e6d016568e0a072b8d27fd4064999706ac58502524bcde1d00c1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM92139198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74f310b2a812cb9ca869aa93a47dcdfef28ab989cccc1b0b9ad9e7a3c26389. 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/USHM92139200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b3f69920b121a0791dc565bb4d1115e51576aacfd0a40311960c907ef4f94a. 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/USHM92139201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2c3426c729aee8b4b86e44d70f6c3f131b1ef434315da613da44d4f62be9b7. 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/USHM92139202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b1acd8c27316cccfac0c4ce73917494f48d77e7e3b14b15c7db4af10cb551e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM92139204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098788517533301d3b71a2e2a01a9f6f23e227fc2a66a9204d20a3e1dee6c7a. 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/USHM92139206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9f62ea980f47224a8aea7015596aa9e56451d419ba22f45ac670c57ee48188. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM92139208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d033fb54b32e0631bc290e12b89c7f20bed823a622e478fb24d7a4469d322. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTBE2300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa975351957cb17689ae280c409ae9d28399c71ea31a03a0aa402cf61bf73d585. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTBE2300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79adf782367217c2dcb374150b1b4fd403966199ce9caca0ebc2cd434823e762. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6L2327781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d511fbaf7c735eafa55c6f8762bf05fc177549d470e8f113318157cccd4d1. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZTBE2300349.