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 0xd3c856a834cc7cabc747796c84fd7cf91af33fbf36dd4c9f346e553d74418c47. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffbced1589da20a475d25ae7ad91b4c60e784180b6546dfdf8f38bac33dba08. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/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 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/QZW9L2308115.
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 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/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 0x3b796eec02cdb6da5972683abdd7420d75069f78a679aadc4cfe5fbf35b71532. 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/QZW9K2394266.
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 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/QZW9K2383442.
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 956312 (2026-07-02T05:09:12Z), 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/QZW9K2371223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60756dfa138995b1a1425c803158300a1e3d5f40ea56dd3a2dc797330b7693f. 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/QZW9K2372656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ea9c32e2d06ce04ea9b69366cf7ff4c0e54dddd4adab8d382487ed9760e0db. 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/QZW9K2370220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3378f407d6bbfafaf96f5c1f0f7738c609918457e022ae0f0717df50ccc731fa. 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/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 0x068e50fdd9fd195c9bee8c9b0517bb38f5e8f6bc12080fd4adb1de2a6c7bb679. 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/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 0x67dc1fd6d644cbdeb769b4fdc2c57474a37decdd639ae3b0d23cc70f8ffe5a1c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD52202988.