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 0xcc7b18321eb96f8a765a158794ba702703276f8f98c8655a71d35000c38053a0. 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/e2752a50-1a2d-47bc-841c-f5a1d98d67c3.json and https://artists.proofprofile.net/proofs/artist/e2752a50-1a2d-47bc-841c-f5a1d98d67c3.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 0xbe5884d2910233be22d791f828383cef36996b9627e0addd303fe254e089e7c9. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZDQH2389278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f81f90f4381c207cb16ac7be715ce3db8e3dd87ef34eff77397a16ce0e9b273. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:20:30Z), 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/QZDQH2389282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb8ca6f53a7628cacfc6288b6e0125867dd0bfc3d806d1060e2553d7c8b29bc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDQH2389284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bf90b009798051fb8da333e321e49d499fbada6f537c8415d533af0c46a9d1. 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/QZDQH2389286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05524cfaaba66611f544bc42b3257fbfbaa3ea527f905e48c73007d211d9b82. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDQH2418336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b944909b22bae749028490b8a1b9e6ff92d72e307285eec4c3c52bf11f639b6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:33Z), 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/QZDQH2418340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb6b64f6f894ef39a03d8fef8013190cc02ad2740db9ee0dfcc9db0bb46ac0d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDQH2418342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc314cd16cac1c938365cd1a154dc99f62bf8e54c2889672507f26ffc5e10cd. 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/QZDQH2418343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50eaca4377f8727e20179e70c3012281d4efab867bc702ba9d0cf312e65fc72. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDQH2418347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4e964d0111614cf37a7cbd798b821f0be77d26afc3af788ec67cfe388b2911. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDQH2429065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfedf07045738191fd5c2922572f354a5466c3eb60258da57ee9f3070219afc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:14:47Z), 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/QZDQH2429066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42475446ad41813420ce6e36ade43bd1999eb8f25aa748ce1410f509f179bfd. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDQH2429067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81c0ee65bb1491ef7d3e00df3769b953fa06e85fec9fba2f04e4b5a714a0ec9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:03:27Z), 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/QZDQH2429070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a3b7d711263873f16ab63c90b6c8762e455d6deff8c3c08783f707400d0820. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDQH2429071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25839fb0a2d3f8feaa544a0a1becf14319c8deacc01bc30aeaf593acf1a54c96. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:04Z), 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/QZDQH2429072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c123790705af70bce57c917fa378cd7bd0f247281b03c611a8220a01d9efa8c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:32Z), 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/QZDQH2429081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce517e623c38ec76f6a4ed1f080eedaead485ccbe6129eab6759d73a004f6b. 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/QZDQH2506720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da66e4dfbd49879f28b8b650512f2eb85fb466a6314a01aa46b4e349edcc72. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZDQH2506722.