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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f990d275035e63a51f46f312d825465543b1204b72b88cadf48da66a99299. 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/4475d3ff-3043-4575-8335-08e646abcb44.json and https://artists.proofprofile.net/proofs/artist/4475d3ff-3043-4575-8335-08e646abcb44.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030035e3f0dd4f23134e19d524663cd0c568a918453cc1233512361d54b8dbc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:41:24Z), 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/USHM91979824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d69a3b36901d8a6da887fa819b4ccf19364c1ea7986710c02875278e8eac9aa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:59:59Z), 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/USDY41946686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a127b06a22ddcb11d88932ea98f493ab86213a7b10c649aae376cdb50b42a5e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAFL2103946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e794243fa87a8277d145d4ab016adaeeca896b4406266cf7c2cb1dd7d8e8fa4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAFL2103973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2bbdcc70d95afc96ce7022c46a518f410486ca8b3f74416ea853c746f93f2a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZN882151899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e018cd289c578b00dd4e59a14c41993e2ae8d677cf319ec06ca74ad34224083. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZN882151903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a2efd6a2d316b716f42afec00ff981b6db8a137a5270c0c315709c82271582. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZN882151904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c84d204376ab5339365dc3f40791bbeae40676bbfdb20972126981d8398fd7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZN882151909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecc1cfcbfba6a54488502bb37b908b59d61ec7265b775c1939813570d25617a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:29:47Z), 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/QZN882151911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6c3eac81e79a81e875cadd909c3f4ca9602c4de959f425c6ab777554022c01. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZN882152801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b7d729d0abb49c2c3144eb4769aab463cd653577813de56d0c04088cdfc7df. 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/QZN882152803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e032e75d64869f6c822e94d8d1ef12155cb8789f0eca29e00b1ab765c0e5a1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZN882152807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516cad3d0db8c09b825d96c6a9d7e0f50b74590ec0aeef590479fcca99ab6ac8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:09Z), 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/QZN882152821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9886cb0e1a3b04f675305da9d8771523b40406a377823904ee124fe0094e68c9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZN882152826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c438dc5cc4ba80eb3290732898871a651ca1b3935649b386e9d7372ed9836de. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZN882152828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf089d509e8919835e340ea688ccc02187015dfe1ef9aedfb4a502e535a18a5ff. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZN882152830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367cca00fe827b3c0b198c5cdd7ba38002fc91416c1bcab01a1fd64896141f4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3TB2419495.