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 0xd14d13725876e3fa17f48d3d4b922b19ee148843b6cbfb952ca7f67b65c40605. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45595aad-705a-4ca6-a5ec-61786c002e4e.json and https://artists.proofprofile.net/proofs/artist/45595aad-705a-4ca6-a5ec-61786c002e4e.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 0xc72fb2ccb8cd34c858a370caefbb8778c5b537a6cc5292667ab01a5fba33c3a9. 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/CBF8B2405867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7093c947fc9efec2c8b0ceb03430b67795b2b215cfba91a1278832572ad185cc. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:28Z), 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/AUBEC2121643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864b037ff3e470882a6d1a0d6de3556eaee2763a0f6cb42fcc242a98f911a0a6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:26Z), 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/AUBEC2121640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9d9bd0319b8d955200574e3cc6d963478a465c7aa270ca89753e19959c5d96. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:06:18Z), 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/CBEYJ2471070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e801c57cc1deb3318da33037e41c72404910ff3206a2834a01b6c76377cd429. 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/AUBEC2230264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e801c57cc1deb3318da33037e41c72404910ff3206a2834a01b6c76377cd429. 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/AUBEC2230264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300bf8e6b8f6cb3b781f97e694777efd93f1c56483da3562a55e228b110d49c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2574822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e695ba92f2bfbd314f2a964e8282e01fe80290e954ad8cd614303abe8a0a8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/AUBEC2234693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec568641b5d0a6bc2a3e797bfcae37aff7e4187a97643ef53b941f3685aac81. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUBEC2413819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec568641b5d0a6bc2a3e797bfcae37aff7e4187a97643ef53b941f3685aac81. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:37Z), 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/AUBEC2413819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836f7a55171ce0d5680e74cdc62364560ed1e5a78c40855191e8dd8fe195e27e. 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/GX53U2574803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3afc915f2a73a90b8d5ded9571b54c1eb092154de4eb1525a13425fcf089eb6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDW2447007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ca258e706cdc25cad5a34a4ca9fa1b833beb24605d1b06a51a84f194d76af. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:51:39Z), 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/AUBEC2489049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ca258e706cdc25cad5a34a4ca9fa1b833beb24605d1b06a51a84f194d76af. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUBEC2489049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a92a0575909c99402b562534e8dfff727b0d8aa3e4c1d310794e5ebae0526db. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAHQJ2544939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1fbddde051eddf515e22e4596763d862180b3474c2999ff3bad1c3a8aea687. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:51Z), 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/GX53U2558772.