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 0x620339674cce8222d0aa5a95f59072bb4b9a4ccc383ec5106bc509ebf4f62e47. 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/db181420-301d-4f0d-8d3d-263d0e525da4.json and https://artists.proofprofile.net/proofs/artist/db181420-301d-4f0d-8d3d-263d0e525da4.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 0x7feeed03397f11eb03be9c8ac28131515c29843876a8f42d3bb8cbb510eb7b78. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USV291405165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c33e6ec2e56839115bd88818aaa5f4095237b4a8ab73030576904dfba5157. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USV291405166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292a83f245427b18d6ef0daa44f24f049949df508df195ec966427d3a5f5c740. 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/USV291405167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde77fb0af0f47fa082a237953a1320a9484e9283dae2efc42bb9c152dce06ee. 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/USV291405168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aba17fd565e68d61c4d672a4de48838a11470ecfa2cff83a21544fa9e4989a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USV291405169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25665623c8dbd35cbdad2d1ed920f6f5770bbd5c0cea590a3a7e24c731111801. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/USV291405171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5db95a3aa2a923112c0665635c3383683a65b0eaa2f2cd781767e791a47e63d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:41:47Z), 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/USV291405172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066387835b9fa9ff40653ccefc716d8dd6a416ca9f5f9b44a1ae34c6ff645124. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:34Z), 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/USV291405173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f33c937646a456d83d4a2c0581d7006cf30e518d413d7b4c79c5cd8e458da. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:35Z), 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/USV291405174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8cde0a0f74da920ed44ccbd41fca99acf3d7aad22e4bf3a752cab46e9ce508. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:26Z), 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/USV291405175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb508c343afbfaff79718167e519c224736a303f0153909655ae27804a9e4ec7. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USV291405178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7fe45640aad59dc89715487f6790949e731db1c1b33981bea82a51d1f9f510. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:07Z), 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/CA5KR2030909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd761a0274d4db4a3756f769439ec6a7c0aa58cf1e4d504f23f4141654999bd28. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/CA5KR2030910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f611587f3250f0952185395b6e062d06c50aa04a7695815dab44c78aa37ac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CA5KR2030912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334da0c5c57aab6ab144394fab4af242674431afcfe9acf0bd049a86da400984. 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/CA5KR2030914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d062c38e9dce64b254cec21e7872b6568ca8d571c18d6c198fdccdd1d7b2dbe. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:40Z), 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/CA5KR2030920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2235794f68afbadeda821c7881fe19069ac3ff24da899b99b620b5455b1d18. 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/CA5KR2205611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7c75e9d721d3f312df0e8ebc2c36563e5b6de933363e2370da7ffc3584e8f0. 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/CA5KR2205615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34828e72448b619267defc0b9ca6762f9faa96e8faec2074f7250b08cf870dad. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:14Z), 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/TCAGT2364813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e6df6fcc9b8e58c5517ba08d2576f71f7316275beefaf5e3d7842375272952. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CA5KR2328011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623b28ab1efcdfd4e3449466036f81565462bc5bf75b9e3a4e73b690225259b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2328012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99620e8edb7cdcf35d64006027fb501af74daa088c6807719484d1829f046c03. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CA5KR2328020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c703e1e2584807f72c78762ea58d8888b32c406e0eb58591a69369d36f4f164. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:08:37Z), 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/CA5KR2327988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd970b75734f6a800f80de4807cfa2ccfc8cf4e837e78764067dadbd6a1a17. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:53Z), 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/CA5KR2327990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0ca206a35e9f0a9539e91b1e2f0182913de8c7abd99b7f161b50cd0b3d036. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:26:00Z), 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/CA5KR2348526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b73268adbddafebd23b79138313b155a939070cddaae90b64c8735020b3e125. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:56:58Z), 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/MXA3V2429943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f55cb65a949edf8b66e465d386604e65c8f9639a8f23b95e93fa8692fc6a62. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXA3V2452339.