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 0xb4ad0e52f2d3736ac3aaf0acc2946717889ffe9ca484ea8d2fc8c92bebc6c827. 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/8a2759d8-a74e-45ba-bc2d-0fe9e6167062.json and https://artists.proofprofile.net/proofs/artist/8a2759d8-a74e-45ba-bc2d-0fe9e6167062.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 0xfa44b8eab451ffd913634172984b2738f08ff9d91ea55afb9664d147c13495b2. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:57:51Z), 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/TCADL1812035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fc6a4e21d414f5cd1ab669bc26f7473b923bf38edd42da25cd6e8dc5986fe3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCADL1812036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9924fa629263c8da82f511519032f8bec60eeb0199b1e87350dd260a56cd047. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCADL1812040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fd9dbb0e11be62d60679c008c91a8f298afc8f502b35c2bf47e4a1a2d8d104. 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/TCADL1812044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169040c383eb6fd5209d8b496ead81f90e75d5ee6761cd7c7eb1551da10c0beb. 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/TCADL1812177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa226378cba59e5d8fa2834bd7f06a405e235389035ef50e282e75788352e7d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADL1812178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b58b7804e2a7ad4affd66b8f5372dc6613c5adf0a0543791613266b9db076c2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:44:25Z), 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/TCADL1812179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4d0f3680f096e5f82de2f8a00982c84c7bf2255c3baf163cc76b785fa54889. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADL1812181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aba732ec81a6151822aab0a24e1248a330ca0a41bca5a73f6189a0f6ca0d80. 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/TCADL1812182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e90904a80977ad435ebb9a8d26c8b67dfe96b75f8702428a4a54471da1ec6ac. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCADL1812185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc236096d7a7cc27cb71ffe4c3650485bb46cff6d074c53e937f405c456c8fb26. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCADL1812187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a1c3df73dab64d8c513726da5353cf00453ac4a733599b0c7af0f508fc875b. 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/TCADL1812189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5f36f9e51a42ac71b9c716a7a15d79bab6b82529aee89f5a2d57ddfc9dd1bf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:04Z), 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/TCADL1812194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aac7bbc23bc0f34a677c72d9477b99a09c195967caf36afc49fde0527bea9e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:49:17Z), 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/TCADL1857410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9aa33bb923f1223c7080a9c6edf16244d22c268becbedca3787c5b94f90a6e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:15Z), 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/TCADL1865211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b34198ba5c1fb5822f9e40fdc94056b1ea7f1a27e99450b4e332d9cc5395c7. 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/TCADL1865213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e73303e9b075ae0c31c649b9e92ca27717dd6a5ea3e27eeadb12a1321df3a0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:01:35Z), 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/TCADL1865214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cedb17c3df17520249117447253b748d4031deb86519f7121b118ab01441382. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCADL1865215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d7eaac6ed3d96e7bc0217197e5de55e7b5aae9a141e41edd35752fd93a3c6e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCADL1865218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ae83f475c57ede4f5491955633bfe0a6f75dbc9fe64006ff456dff01bfca4c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCADL1865502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4d2b83c0350c1e253002f8e502e22a2648025f66dfc40c5b69a5dcf38ccb14. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADL1865514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4506fcf7a4e4756d811631b1ee574b8ab39197c088f88cc9eec39dcc01c4717. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCADL1865536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b684918d89d5b3a906ffb8e116b6dd5857eff083f83c409b617d41a2bb4e51. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:53Z), 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/TCAEJ1945369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d40caf155b0026c7db948e9c41727b766d1afcfe126b65a7944349cddd6a6b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAEJ1945377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a290ae37c0e705bb7b7447117defc12c7b0153b2406653889bdca67faa095. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:42:08Z), 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/TCAEJ1945396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0288d623f1e3242c8c79538e0b909bc3c8e75fbdb364234cc136869b1ef9c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAEJ1945447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd4e0936566d0f8bd90c42cafbc2cbf845fecb3031a34c6ba74dad0a7c2f965. 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/TCAEJ1945470.