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 0x6d06ab7ea552ce240af86e35f1f9fbf44239f2316508f9a626da487e090ee1a4. 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/c60ad33e-3fa2-46be-a998-cf6255c2be20.json and https://artists.proofprofile.net/proofs/artist/c60ad33e-3fa2-46be-a998-cf6255c2be20.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 0xb79bfeb0644d5e240af09f8feab66a19a651bb7761aa232416bfae409210714b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NO2DY2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba57fa648c21b506984e712fc166892a68d6c9c3d57b3b63162c06a188988f. 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/QZFZ62471285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038fbb89e2a4965f57845955240d5fabd53de9fb780f81f508b4056139ff1509. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFG2392026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8b497697e24de83836bd51641098e06a7a5092b79615f23edabbbc8f79daf4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBA2326837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81364ec3db9bd1b83933c42d4d32029f0c7d98ea396bda1418caf40d5d256c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB62305842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26a6d69586c11ac20916133d65ac227652b87cbc6a985ba5d4a7e06c2c5d1ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP52314143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a2c8c59bd1ca4bbcd40927d716ff4a4f96128f46b5244c2025103195330ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2338002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6687f5841f6fed3772cc1bc113e46743c39e03ffceb15996011447d2921dffd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEN2362826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8fa38f9198a2543c141d0b780f32e3510d141cece2c418f77caabae6912201. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN82300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd348c539dd05b387597980e9fd09c4217554d9f1de5173dd3bf8b3dbdd91b816. 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/QZHN52367692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a2c1656fd3f8bd1f1d5243cf5db26c55a804df71a624817b6f2429d892b41b. 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/QZDA42350366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252733222ecd83080e1d8a06c796f18db8688fb28d44a63034e22fe778eaecf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42348673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ae53b6d63bea4663a8f1575ad9ac95dc7d8af8a4d1af1ba439122a996ff82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBA2260421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8da449b7f0bf88e8ae877be2ed7a422bb558ff2eac6baf330711a35bdd478e6. 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/USVI20200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7a4b6ff03156b8e0cf66be5708f40232b6e9709fd0431337a5beab467848b8. 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/QM24S2400575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7c16f37b036a29e15119dc1031deed487d2059c780dcf708208e118c8c739. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN72520704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde8522a8e0b5e7208ad7d322685bda5751c4d7a3fb6791b9082137ba1c89d84. 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/QT3EX2488602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7769d22d63ed183875805f004a4cc798b1a469eb5bfce995f1300af096c02c1. 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/QZWFM2495740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0955c850fb49e5d91df5e46d17f74067554b6b1218a21edb8ca4df56cfd0c. 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/QZNWX2432401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba57fa648c21b506984e712fc166892a68d6c9c3d57b3b63162c06a188988f. 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/QZFZ62471285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8b497697e24de83836bd51641098e06a7a5092b79615f23edabbbc8f79daf4. 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/QZTBA2326837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81364ec3db9bd1b83933c42d4d32029f0c7d98ea396bda1418caf40d5d256c6. 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/QZTB62305842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a2c8c59bd1ca4bbcd40927d716ff4a4f96128f46b5244c2025103195330ad. 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/QZNWV2338002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6687f5841f6fed3772cc1bc113e46743c39e03ffceb15996011447d2921dffd. 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/QZMEN2362826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8fa38f9198a2543c141d0b780f32e3510d141cece2c418f77caabae6912201. 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/QZHN82300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd348c539dd05b387597980e9fd09c4217554d9f1de5173dd3bf8b3dbdd91b816. 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/QZHN52367692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a2c1656fd3f8bd1f1d5243cf5db26c55a804df71a624817b6f2429d892b41b. 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/QZDA42350366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252733222ecd83080e1d8a06c796f18db8688fb28d44a63034e22fe778eaecf. 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/QZDA42348673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ae53b6d63bea4663a8f1575ad9ac95dc7d8af8a4d1af1ba439122a996ff82. 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/QZTBA2260421.