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 0x062d11e16e8644efa29625caca12b3de874a4b1fcd972d408bb27dee08a568fc. 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/2caef6a1-3f5a-4e2a-8f3c-e71bf37690fc.json and https://artists.proofprofile.net/proofs/artist/2caef6a1-3f5a-4e2a-8f3c-e71bf37690fc.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 0xa5c6d887234855f1b8d0415853e1e7901186825fd3c78d6d69ceaec6ef6f9ee5. 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/QZNWT2463966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d2e0c5cecd4bd82028509c06e9ab52516639b01cf24bb918787c33e77a8e5. 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/QZNWT2463967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc941a8e77332583d0f2816bbbc212549afe985dce60b40efb3b06f26393d82cb. 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/QZNWT2463968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8db6c9cc466465b19ff76855ce9c0df4e2cbe08371032d22f0d2e62f481a68. 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/QZNWT2463969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6697c0fc12bdbf7741aa587ac59469b9073f4f70165fff92215c44ffbd8f8f. 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/QZNWT2463970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33495826ab2379e300d487834cb3a2214bd603a2a60fe6f2c98e9eeb7c4cbc1a. 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/QZMEP2433446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62545d8c3433a159254824086313beff00a9bbe269dafcc91d31a70dc73cb8a2. 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/QZMEP2433447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966eef6af2987e982581a9d4b22ead4cd0424a45dd20216fd2dfec73d0b1e72. 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/QZMEP2433448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae0a36a928f75e9a7b8aff25b2a8d40e6cfba60e9e674e5986d7428bb7703f5. 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/QZMEP2433449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075d51a9228b8163f3bf33e1ecfcb53dd26f939606aec3e67efa758ce056d548. 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/QZMEP2439978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb2105916dbaee4d352258b4f72a2abe208e6c2176521db901f01f336cc6735. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:50Z), 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/QZMEP2439979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0857b1eb68f1767105f49160754e2536415c9eb57134f96deafe80f94c86b62e. 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/QZMEP2439980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6e1a6abe9b5306effa6e012c6f071e95d5ec74996df1df738ad3ab8d8a94e9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEP2439981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46021d3bd775f89acf858b6c983a6c1f23076e6e012b6fff84b7792e1832bcb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEP2439982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9984944bd9be17d9b8e18ff79746aba0fc56a0e2c0835d4236cf246f82b47f. 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/QZMEP2437015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a784141a500bb7ed76958acbba7f89f725240719412dda972873e3775c7a33. 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/QZMEP2437016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259a66d4c3a1b7adf90951e31cf6f4a3e2dd2e7282c41130650f3c5a6e56d4ad. 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/QZMEP2437017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd951fb3d198524ec936d51c0f5c0086115d5ed361c4e22d7fabd5bc0ddf82792. 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/QZMEP2437018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd7c192005b9e61e248ef39c88d7c1fe308b825c702f95e9c68f8b2221f219. 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/QZFZ62469219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b90c06f5f100969708464285ab61e66dc817c996a22127367aff7c47e5096f9. 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/SE6XW2306564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e1461e5e2fd03b7b4087be1d91195a9ae97a553431c99caa51240d5ff6c26e. 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/SE6XW2310987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3bfd668482b8f023d9f88a965637229076a159a712cf10cb7e2b0c3a48fa17. 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/SE6XW2346345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d033b7d8b8759993683de2ce0d21ebc134eb36465f39eae272f01215d2f257b. 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/SE6XY2312164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94c7838ededc65da8da86ced2c7867fdb6320e661aeede4bb501b5194b52a3. 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/QZTAW2351922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8c6efc37032884f7fccd0c2918c4520c8ebe5050a73039aeab2cf92721205e. 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/QZTAT2389401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4302c939e5f9106447f9addb538cebe963956be4ed22162435489f776ca88d4d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTAT2315012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a50b69c52040e9fe10cbe0235b9f10f732d87659d95afbb822f2965015d6de. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTAT2317166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1898b899a0d574e699afab08695031bc6cee3c8841fd883f6e94c09150d2cd29. 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/QZTAS2388525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb28ef2ff70a738112f7463f7253b1cdc42937ffd93dcaf46a7729996f9bdbf. 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/QZTAT2314894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41362574802f7ae2be3ae41542c3a3e62c7fa07fda38492bf0236aca6fcbb79f. 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/QZTAS2383778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871f381f0bf17152f1674ae0e63701ebf77f1cf4c802cc42e02c734e5d3c8835. 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/QZTAS2394017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b1f83f6ece3f8516ce6fb7e9f9b91d80f402eb997870b2bada3aacff70cc4c. 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/QZTAT2314895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6b3ae82cd81bef302efecf18ea9b2dfe04772f533abfde66ef2540a87e8078. 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/QZTAS2383777.