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 0xd3c856a834cc7cabc747796c84fd7cf91af33fbf36dd4c9f346e553d74418c47. 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/7344c8dd-0b26-4f64-a57f-b3c0523a3d12.json and https://artists.proofprofile.net/proofs/artist/7344c8dd-0b26-4f64-a57f-b3c0523a3d12.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 0x0ffbced1589da20a475d25ae7ad91b4c60e784180b6546dfdf8f38bac33dba08. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PACC22300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe863a52547e07fef52f810b54abe06dd6a74990faef209629a2613254211381. 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/QZW9L2308005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dbab1c815e88bc2a1c6fcd300b3b64cf9901709137ebc2d30552c30c31e23a. 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/QZW9L2308115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba1f2ae75aa1d0cb4551b4e43cdb9f2f0448fff466db89592be349c7e409cbd. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZW9K2393916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5defdbfe60e4c85ab5fa7d6d96cfe00387a4af79e93959b384d3e2e387a24785. 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/QZW9L2316750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099d8735f072991ba2d1bbcca2bea3f0aeeb0faa1e8340c95734555c570b6642. 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/QZW9K2398546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c08444defa5c3c0f009d71a2ccc738d6e31a1b5e0675b2ef6bf0f525b760fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9K2397545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0f8893f11a9b4663484b678a3761dd6852220a553a0417518123e9dd28f33. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZW9L2305786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896be51cdf7fbeee2a04f4521bf3b6cd94a98f78d57ee07036ba393789e98369. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZW9L2316560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2996ca4b347058e3d23131416064291ebfc51e50fbb0ce5b99e3c3400889ae. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZW9L2304029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276fe4155f0af2e5988de23cb55437cf4b1d69f9fca2f1142cba8c01bcfe55b8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9K2398188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a91a2f029b2002dba28c3697798d56bad91fa17629927ac02bff7269a377f13. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZW9L2304028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d6f6d35f562e4a17cbc29c67a3d95e389b622c64e130fb4c7c00239061e4d7. 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/QZW9L2316178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b796eec02cdb6da5972683abdd7420d75069f78a679aadc4cfe5fbf35b71532. 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/QZW9K2394266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ff9fcae8e1c4f292e6031209fce16f79ed537155946d32cd13dd60ef2ebaf. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZW9L2304018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb851e19038a2e54aa57df5c47595ba8174fe3db65acedc487c15dda39ddbd9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZW9K2394290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2a1e5106bb0e80e447978b88fad51256df003dcce8128373dee4621f913242. 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/QZW9K2395593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b6f05c001dcbdd0baea6e0e66d6e776db8fa0e276a36afa6bb84ed6b026036. 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/QZW9K2383442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c5a3cdc274a40a28f6ecbcd859ba4cb24fa58a4273ef9d8602bc6ec637768. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZW9K2371231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b7c7e3f56c48dafd3840c6eb17daa6b8f8281bc21bd45e34acbfd0ea6d06f0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZW9K2371225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22edda9a1bdd2f9b90abaf870e9454c1e17f4ffe7869aa02b1ee416caff16a87. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZW9K2370536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af1dc753bb22752e3799e90cf2e56b8645a6c669e5554d26804367639f14fef. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZW9K2370982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffdc647b2c53f849a05d7160024c84d9189a9efb4a897cc8d2c88ccc9098a68. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZW9K2371229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380eef930bd1e2d4ec07569007c88c5566ae9a8e5c4be9984e8e4a1a58f2ba04. 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/QZW9K2372186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2c33da7daeb31edd96c67dccd0912f61005dd6dbd54dbabb260d45f3db5ad8. 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/QZW9K2371223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60756dfa138995b1a1425c803158300a1e3d5f40ea56dd3a2dc797330b7693f. 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/QZW9K2372656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df7b468f8ecccdc2ea47a782cf507ebc8291c76be58f55ff4e3e25e9531e2f. 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/QZW9K2370816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ea9c32e2d06ce04ea9b69366cf7ff4c0e54dddd4adab8d382487ed9760e0db. 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/QZW9K2370220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3378f407d6bbfafaf96f5c1f0f7738c609918457e022ae0f0717df50ccc731fa. 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/QZW9K2370449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6916bbd5bd24ecdccfad0aa0bb96b33966ce518d5ba521326156f99077331. 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/QZW9K2369026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97c55b08b764d84017227494fd8f3541c2f96b2308e0d5214d7a2ddf72670c8. 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/QZW9K2369024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711389267a315f2139af8b6e2d8c30b5e191c746140a60fd3c2fa55643697ab3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZW9K2372772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e50fdd9fd195c9bee8c9b0517bb38f5e8f6bc12080fd4adb1de2a6c7bb679. 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/QZW9K2370842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e109283f50f28c216d4384027d61d2c45c5268c394cdfd01f33718986480855. 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/QZW9K2370430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64f8b51c747336c7880d316a09fdbeb24883342759ce930e8aef7bcd8df108f. 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/NLRD52202984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a5310b8f56aae656ad3ae723135b9626d83f4bcc747c760a2050ca958e61d0. 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/NLRD52203003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebbc87f5fa1baa41901031b4218fa6741acb15773f5bee3fc2da89f305ccdff. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/NLRD52203007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2a5ec1c95c8da776157a44ac22d27f4f1e2b6c895827df05f823a5f48a139. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLRD52203002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65fc2658c70ffc5d2c17c63ca6fc44fad508b459f89c07d97d8a7ef8a7c0089. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLRD52202990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dc1fd6d644cbdeb769b4fdc2c57474a37decdd639ae3b0d23cc70f8ffe5a1c. 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/NLRD52202988.