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 0x250607e956ffda93ba4a3b06f4b9f5c71732c201e01a166153c3c2eff4d80bc7. 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/b61e0e42-49ff-47c5-8ca6-e9f9a9468ce2.json and https://artists.proofprofile.net/proofs/artist/b61e0e42-49ff-47c5-8ca6-e9f9a9468ce2.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 0xf29d66e08ba635c05227a5261ddf2bba7dd2c6b9e86d0f99ea5bf44a692c9651. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:36:28Z), 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/QZES92186578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b1ff10f36a4c2f8455dbc07549db0bd2a58a6f3c12bed4acf1a9875c76dedc. 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/QZES92186579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f355e91143f4352cb70e046169d7260b323d92601effb61f63008033debc5a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92186580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f355e91143f4352cb70e046169d7260b323d92601effb61f63008033debc5a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92186580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e8ca6a075f5623255c881d35981a1f1a47e1d05cf3c4d030a376f6f7c31ba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEP2287407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5682e034d9ece0132a6834478a95efc511ee44c8faecef938b84d407c8773e6c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:55Z), 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/QZK6K2362238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5682e034d9ece0132a6834478a95efc511ee44c8faecef938b84d407c8773e6c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZK6K2362238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7790f5f6663331a90e9a21277eda53bc4e38d0d029c7a0c950a453adba10bc3. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:52:12Z), 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/QZDA82460742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e8ca6a075f5623255c881d35981a1f1a47e1d05cf3c4d030a376f6f7c31ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2287407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2691f8befcbc916a88129120c4f43bed2c2687a0bd3b13bcbc629248e298cb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZMEM2450152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e8c54c2937775831fb9ea7e2dc193e463ed3c68350cfabb0905ea824280289. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZMEM2450153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7790f5f6663331a90e9a21277eda53bc4e38d0d029c7a0c950a453adba10bc3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZDA82460742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed58d4ba9e36a69bbd729285a615b87c2ce41d276f090a54d70cef250f9d2118. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEM2450154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec264d5e883dcf415b4c819f3e0daac2590052f03bafa1baa3e95a2f7a3f19e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZMEM2450155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a407715fe9e994b5d0d1e3410a4e25220aa959892a2a15ac43e7d7dceeae5a7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:20:37Z), 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/QZK6N2570367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a407715fe9e994b5d0d1e3410a4e25220aa959892a2a15ac43e7d7dceeae5a7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:48Z), 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/QZK6N2570367.