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 0x3c70717fa698278d45bfdb5c37ee8aa7d5ebc1f704a0000607baf5667b4fed94. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/936801d9-3984-4e91-87f0-222704e3f78a.json and https://artists.proofprofile.net/proofs/artist/936801d9-3984-4e91-87f0-222704e3f78a.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 0x4ac7b517acc99bdc45efc31fd43e5a55b3c9e24e3507a94a209dca3c20258c4b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FR26V2098843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ebffe878d8e3ea566e50cc46ada7bb5964bc91f3826837dc66717b5c61971d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR26V2079498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0e14b26ae320fecd7fdea432954b2592665c61946b18cba3e61a24a5f5de6a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR26V2085593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec3d03c47f8c17382d09a8fdb52f113fc7bbc8d0b12d0a3b8f44cc325f89d32. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR26V2076380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fceb6ae2cbf72e327aadf69fa213ca7a95260ee524ef2f8236364169e2ea2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR26V2047287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a86b90f96c859279f161d4f4a553e747b832887b61433fe228a3800c2c9b55e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR26V2085592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748dd0679ff4c5a10266abc7ce3b8e88283d9c57a84ea0a2ce9314ffa67a4d3b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2431643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6166be7a9aa1e6d698efebaf7c8c88ad682ac462b60764b584f8dd96eb7a924d. 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/ES71G2431644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864a70a9a796c69a041304414f0824a26c48fe987a58e48057fefce8740c3b98. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES71G2423506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b17ce0d1453b6843f6793b32b4d1573c3e8d6836635d87bd237edc64600ba8c. 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/ES71G2431646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec9856b7c10986ec9922f839def0fffa8435184fb469f32853cf226de8cccb2. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ES71G2431647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948eeadbafed6791044c4328adf2950806458f9a79154abdd9f92701ef64edaf. 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/ES71G2431648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9160974ac0a254190c10fc8dfccab90ba89979ed6332e7f77f6dace7b6761581. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2431649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c156a06e09aa8507a4398413a739448c6612c9cb8a81e3e73a6f4c1ca96f1a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES71G2431650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1189d2ffd2f9b72f0e4d516a12c3ec962a6087fc1c7975d624851b072d60a278. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2431651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757b7c130f9ddedd39e5a185d28adeba1d2c3fcbd75cde4af56c68eca6ba5c3a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES71G2431652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd7381297e2ab275cb5cbd477e5fc09dfe2cc8c347bc077f9b3742a47239ffb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES71G1902278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe301322d4666e2d5e08635a9e8e7acaba55bcbf5bba5fa11e29d2f7a441873f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1902279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7e3f4b2ea8bdd590e3c137c409dc710fef6ece870ae9491b9bf66b46d27329. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES71G1881902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915a0c0c8c618a0b3414e4167798772ef16d6727f9d5cd04053d21f6575c486e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES71G1902281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea02570d8f704391b0f6a29fbc90372b4bbf5c6c921cc203ecd86c031cd6720. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1902282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dc4531785cc9e4473dd31b22f68ec62a1d7e640a4215b31f1956a177edf0fd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES71G1902283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3382b71d27a11f43cd4081fe8b5c7b98dd5534807215f0efed5a6505ce6a94cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1902284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092df37507ae500d9980c121c53e80e3a503e5d04c0531643ebfaf7658ce9a9f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1902285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b95c58d906a5017397af7db33c49daf8c7c10310be25e98d6b40b04c9954a6c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES71G1902286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d0f4fb7fe5384980ab5a434c18bd4ebaad99c95068202922e9497ad052c736. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G1902287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9fb3d0dd7097e2861b15bc072757457e558560df79fca6ec2042b145f12996. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1902288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c0eadccd6a7033948878002d35db3c7c6271e661c2d6d8ab2c8c42b54e175a. 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/ES71G1876895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d47beceef2c58a347c8090269bd0490822aba6ed9a6f9367218dd35a56dfb. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ESA011712814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ebe2340be1bb94d4922b97029e10452abdfb86c567638021f97038cf525807. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ESA011712815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33027f11fce24bf24b73c01a7bda6b3bf08a8f6776b1eb77ecce4319345d9679. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ESA011712816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a533a0de49200eb9434743dfa96c023978ca87fa150fdae7b3f3aa6a15dea1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ESA011712819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4c4ed5cbb054e9b5de6be9225bdb53961465c4075db06bb08ce385b67e2f14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA011712823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ea78034675efa90fd35cda1b1e6fe2baa1a805fe3dd4d58fc869a5830ee6a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEAF71257224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb20f27ef678ec122770f1ac5c39afe432f96d7d170be708bea2538441e5420e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEAF71257225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e060e608f73e58b9b01743283cac1143d6c56dff45e68501023e2f918d60e2f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEAF71257226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015fc1adaecb20a1f5fe51335a585bb5b78c02e2a10e3453190002d3aaa89ed6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAF71257230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9385cdce0a149c35f25f5b3cfd90610e43ae9a916b9e0fa8d54cf57f716cdaba. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEAF71257235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b17ce0d1453b6843f6793b32b4d1573c3e8d6836635d87bd237edc64600ba8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2431646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec3d03c47f8c17382d09a8fdb52f113fc7bbc8d0b12d0a3b8f44cc325f89d32. 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/FR26V2076380.