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 0xbcc7f79d392748d232141d5c44547414087b881b5e2869af63122e44e5a273d7. 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/e8b0104d-b378-4e7d-af26-f006c4b88454.json and https://artists.proofprofile.net/proofs/artist/e8b0104d-b378-4e7d-af26-f006c4b88454.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 0xb5d8ffedc9c9bc768b955b475c1ac4ed724a200f008a72bf04ef99cceb0e855e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLC820700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba294a674e32768c838d02b3ff3fc0e5f8baf9228f2176efa4b1e5bf1fd59a4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLC820700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21ffe00dd52fe2032b62a6b975c0a2ab83aa85421cb7f526deca7389dc2f10. 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/NLC820700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eacde3ed21ccff79aeee0ad62f70b0a352915f601b010cf6dff42c07fc4bd67. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLC820700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca18e62c567a98d5aa983825fff5a601f49b92eff443eaf75b02a7bba1162b0. 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/NLC820700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552fd0ff30a91dda620ee9b8afc3b38ebe1803fde751611a7bd620c35945e3b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLC820700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36575bf6e29b0ab263709dc4b68fd36ad7604134098b127433b78b112ab19377. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLC820700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e6d358e49d3951304dc099d56648194d007cb1b574c44490fa46e2cb46a2c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLC820700214.
Sinterklaasje Kom Maar Binnen Met Je Knecht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1f44b54ae5b64b04b7e6144d68040a6fd1d03846ce08a77a5c231339f141a3. 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/NLC820700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927040f57e30993b74019a1e2b0f658308c683fbe0aa1306b71b90b4d9a52b98. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLC820700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6759aef3aa17726049d7ba2469b545f54654be29186188b622c01273e1791993. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLC820700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c2d15391cb4269d56b17f3fb1ba7f157bf425636dee34032ecaf38450691d5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLC820700218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03133a57e5369eef6ac454ab26a1f4e7d475a8bbf0fe1a6449a894d9019a2c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:57Z), 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/NLC820700219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ad7ebefb90be57d101c006eda728ea8bfddfd4192ee10bc56b01c7e8de4c7b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLC820700220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb26ba4c01bf46b4f98b85232eaeaab97b011b2cc77b4d99c6e82885e96062c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLC820700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3db904fba7e501d43a735d113feaef085e1ab8ba8c17d10807e0731151e243. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLC820700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e27fde47e14035545497f23c577d05f42fc1e99fceb9178879df7b650f029f0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLC820700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2262dac56c8a5e19eb1ad4363ed29db3494d1b7221723a86488870eabdfb49e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLC820700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8f1149e75d0379baef6a5b6cc40c27358ffa47ed15349bfb063a8839e08ab. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLC820700226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd948d1ce891661f6f4456eb1cb5efdfa3e98318323c75946bc656b65aa0f05. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:29:14Z), 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/NLC820700227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcafa276087304a310be4e9215dd34f4a85553d1d165677f3382edb7123ffc. 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/NLC820700228.