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 0xc9c792b473ab430f665074c32343d9ef09e3f922dcc9e28d619ca88946d9e0f4. 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/fb789b21-ebe4-4351-a34e-a6930d93ec44.json and https://artists.proofprofile.net/proofs/artist/fb789b21-ebe4-4351-a34e-a6930d93ec44.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 0x046128b7632870dbd2c9273640806cf8327577ce2090e54d53cb95393bb091be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJW2439470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85d47479a6451bf6784872f3c97900432b0b69df7a276f7b34ad57096857e62. 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/QZNJW2439471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797b7ed0c55d2d52dc26764823491a1e2b548f8c0248b298ece3998b37ce342. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZNJW2439472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc366840dd9f9b0ac90756abcd5a2b06c1740afbdbd37e8a04aa8cb475ab2ff9f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZNJW2439474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c38214816c7a3379d34fb7f6fe8f112243a3ee79fc7919a4e4ac6650c54a3f. 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/QZNJW2439475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b257b49336d84cdbd7d0371b5b3eed13a3307f8a27538e2fb424afc2b324c7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJW2439476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76df93d4d87ab656299971b45640c9d4915f973a8d4eb3c41c3096f05fe17d36. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZNJW2446558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5731115021cd75b283771c0ebd9d83798c83a835785e8d85f12c9a08e3eb158. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZNJW2446559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013435530f35165fdbd7f578dc91624fb9f5abb1402ec346251603e792dff397. 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/QZNJW2446563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeabb86bebcdb554ae01c0f574a40bb6a95b5b1ddaca7bdab7e12a9bcf9e3d1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNJW2446565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da52f6400042b8ba2acd4e9ff092e2f6f9a9ddcb9921edcec23a3f17c65d14. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:46Z), 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/QZNJW2446620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e4445f018eec38352ad31a243af32009892b497682e753e1b935296e16350. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:44Z), 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/QZNJW2446622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf473f7878dafdc9205239e58ab14ea4c121a05031bdca7432c99375402d6f19c. 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/QZNJW2446624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ef71f8295cac74b0b09778b1359b4c9fe9e4f09441642a40bd76aa6fb0bd5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:45:54Z), 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/QZNJW2446625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f441f7696b36c1c326acd5c404c1f1e71af0476b64cb1f0b4635c9fa93dcf39. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:38:44Z), 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/QZNJW2446626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cd443ecb614e56d5fa5251349ebc605f2ab0abb5ba754c342ae7d042448a46. 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/QZNJW2446627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e711f987ee0d9565fe7e5c033feb060031d39eb1d9322c3f9cec36ae5262eb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZNJW2446629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d00b667df607082f1dd661ace5937ee536744e1c1166ee6f038bf0a2d5c2c6. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNJW2438185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5164422fd9cd26c5ab0adfc9361d50a181f7197504bd6b93e6b1bc8d8d4cff5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNJW2438188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5dbda35156ce65674a4a043628d0e1bcdd74fe11fd4ab6d30b226e16218e92. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:53:58Z), 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/QZNJW2438189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec11677360f69cdd59f8acaa6c9c44d4f966f4bb04baa9bf178f915b94485f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJW2438193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffac4d61e53630a2130a12f975b52264c318c78b75bcf81c2b9df1d80d225313. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJW2438194.