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 0x59ad9b58df34e653fd0d3c2d754c9b896063908de454d15e3b40b8321d262cc3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a22865f5-04fb-473c-b32c-2047a9f9e572.json and https://artists.proofprofile.net/proofs/artist/a22865f5-04fb-473c-b32c-2047a9f9e572.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 0x3582696fc6f527488ac18b60c7345a7d7997d18d8955cfcffad978aa86cd6106. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA011884704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712cbc1fb6d4214a7044337701152f5acfdd0a95f10ce9b13bf6487808386694. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:26Z), 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/QZGLM2477427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f137f6c563b6ffb94111365bf040405657c607539ae2f85a3ce2fc49c0b912. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:38:22Z), 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/QZGLM2478761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0217b63997d622138104db0dfbb6e095427ad2babb774a07814d59274ae7c37. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLM2475161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0497d458bbc089aa54dba039edf5498c149636073083e27dc60a2a75173ba09f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AEA3A2082857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1903ceddef172ee405082e8af1fa914fc19de91d7e0c75c8cd38a00764750827. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:29Z), 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/AEA3A2079009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b49c78f7f9bbb77b067be198dcbd44ee93ef3ed80331707b5b0a1d2417d33b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA3A2011839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66348eefb7b0030fe18c1a8733dfa94e26c45b15a0a79b3d0e25bec7034f349. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/AEA3A2028101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b954ce671e259a5a525629f66831ebd621c87dc9f899a3ce33402411981cc8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:40Z), 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/AEA3A2005272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42cac11c19a87b2d6157d73299851b972a30dd7a08b4d81b25d244c69aac09d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:14Z), 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/AEA3A2071379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc999be53d252652e972d7383248e00986669e1993be6159ec7d7446e7c680164. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA3A2083671.