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 0x9714206c44d085cf3b2efa2ab557838c2dbc1ab1878e5542f8d698d2363d3d41. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e479b50c-477e-4e27-bfcd-64b5b17748f9.json and https://artists.proofprofile.net/proofs/artist/e479b50c-477e-4e27-bfcd-64b5b17748f9.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 0xa28781133314438943bdc50ca29de54936e7cf36dff2ebb0ea2efe5013e34fc3. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:37:57Z), 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/QZHNB2010929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccf9b25c384309cad7f4851769a9ff10fe666709ef9676e836ffc80e33c7b80. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:44Z), 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/QZHNB2010930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4221a1513ec3ea5fd0ba3160a1c9e3f9c2f26b137e22839cc5764901780ecb. 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/QZHNB2010931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d44c682be872c3f8f6d874c784d899051a36347633c55f4b13f4e06043e1e39. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:27:41Z), 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/QZHN62088282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1bad21b38d9f25629b9f0fa66932dd9b47fd675f02bad4526b1486463da96c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNB2010932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5f10806d4307cf1551321dae6c9c0a54465a8eba7b7443cbad80e3a7888a9. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:05:11Z), 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/QZHNB2010933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eed68b4a9c31fe5d712ba77100959cd97a1f64cf12f60ced3d28a0285da283. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZPLS2017998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a6dd9bbd7c4d397abb699c70e37e557176c6a68ae5d853fb13b256f869eb2e. 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/QZMEP2037547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df3e8429e90759b55bbb400ce1ac125b34b3cd17de4d35079f707a2a14dbe6. 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/QZNWW2089070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1dfdea491cbbf94a994f7537a919a251b72381b3fa5a6d3e60bdddf5241ce4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:18:05Z), 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/QZPLS2017999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21429550038b48bab94a42f45fc305cef6e609948c67fd7b5da163ce12ece35. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPLS2018000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d646ec7177800d90a4d239c5fd1f6b787d24c79a438c3113db19a1aa2e370ef. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZPLS2018002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c14c9da2b93c91c415dd73f33cdcb153aeb13f93e295be97bbc7856c993621. 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/QZPLS2018003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b71dab8fbd5393bf3f4d2413ec1d5973e12b1c249c823970e5dc18cf1550154. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWR2164983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d94bf6a956aba056bf489ac1ebf3b0c1720011169e5d38580f21b156beecc5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:31Z), 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/QZES72335071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b6e866ef60476a67c15494da7575ec141ebfef3a922e56dbe7eac24cc2180. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:17Z), 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/QZNWT2381721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00ee532c013ffa237533c977e697884c7426149c2642b41c1daa863a39bc6b0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA72414086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f2de3231b621348e88242ba36bad8177ba6ccdd27b998a2f6d77b8481190aa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAS2415511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a2de0790da4dcb440f378fe9ec8eb3f5d0ab82e0b67363688f7266800c030. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTAS2415512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986db08cdfb4fb3befea80a78696242c3b242cf4259569c8edd482f6b2b9c88. 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/QZTAS2415513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd15fbfab139279e81bb26c9793a87c685f56ec662a519da6f3e1f6e51c972a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFP2328081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00ee532c013ffa237533c977e697884c7426149c2642b41c1daa863a39bc6b0. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZDA72414086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fb8549d895d59e4ec3547c735cd634ddc9a4a52a0258a149f44a57f4243838. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:23:54Z), 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/QZZ762533581.