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 0x1bae6fdf5bd760bb530407b12f000a3d03535d61322928fd46748f7392002581. 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/2b56bd96-176d-4ac1-bdde-6a5db209fe1c.json and https://artists.proofprofile.net/proofs/artist/2b56bd96-176d-4ac1-bdde-6a5db209fe1c.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 0xae52d1586ba3aabe936a49bfab7817714b07fe157f477e2bcc2d341156482cb5. 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/QZPLS2451457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a23043ef7d6a43b7234ad25e1df118662a871cefb9f80f16d64180b7d06434. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZPLS2497501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79276b0fad2ffba885582311c3e9000bcc2f73e6543772bab8650580e28a74a0. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZPLS2497502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4500375ed6b764f22c488ea139832d92ee47852220bcf1a6111e59d879f727. 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/QZPLS2497504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a0a2f334a06fba3828ae2a24bb7f809d3e6247941d7e7b9467130c92927419. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42499113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fc35ed743e7f499888111d1ca1165c5cc1ea5f5132a0b76e651e7fa6209db9. 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/QZTAS2453321.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72de7d9c117ec31209f73546e81376c842d57ce9647ee4bb2cbccd84d80025f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZZ7N2413966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c27b7cceb4a066f8493622053b654d1fbfb726d0f704edf21b9ac42fcf710cb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QT3F22462585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad4d3b3f79671618b8850cb0d8ef90d407e4c51c863cfee6986c70dbf5c66e5. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZFYZ2561898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518fef46647e4ba81bba704420adc472f0e1b26731768cface9767c2f99f1064. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYZ2564714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4e4b9e8fcb073cf0e33fc69d3b3bde3bf90b21527ba52dbdca2806906eab50. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZDA72596203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c14e542ed3466366f0b9056dfd850a65657395755b6840180e0e673b8d1258f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN62503853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469c7baa794ec35b57283bfff2b79a1e0747c7d52385241ebb8dabc2911f9325. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN72595992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4169252b1f6a086df159b7de9d9095884b1285c12550b17b9aaac4e5bef78ab. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHNC2590049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f32c33bb03d43c2f50a7ca4d7a35d7feb289b9bdb3aba81c87a9b229081add2. 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/QZK6Q2528676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a8d52a5cd760f21574abe2e8a5635d2ea604ff7be9a6214e838cc74f49a04. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6H2564636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e17775ba03a033e7b6b9dbb854da313cfad0e4cd532ae6ba12f9915225834. 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/QZMEN2591329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3880335b32b33e4fbb2c2605820e685c3d256e4cd63b27df27e26f6df9b461c. 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/QZNWW2508536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65efa43f7fb259ac8081d9c1a1cf7340148957ed1d8127945e2c98d5b6e657c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZRP52554465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c167b7931e4f0e7d90a06dcbcc3c09843125dc9dc6c84507bbab7fb2f434ca. 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/QZTB92501255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038158acd7397ae2003b46009b946e77608b5f0f14dd2e4e3f6d3e2b2e4b423b. 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/QZTBE2506527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c3f995ebe04ca9655762c4425ab99e66c7b7cc79adb9ed6d732a72672cc5f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZWFH2556210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce34dbced752af7a13078c676d5004f9cf841be71fe3e29bdd559bf25ff8933. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWX2532261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5e518da1a51fa6d32975cddc9c1a2f7c7f56076490021044b48e70fef68709. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFV2511265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c1cc320de6d1c939da2466fafc7250977d0c275f461b5fc9c96a43ba90575. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZZ7R2563542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac91ea7e1f907dcaf9e4b3452376feb41627820e7d869afe1bca4afcf321766. 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/QT3F32588731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82c487dbf324e368b31f5a85f180308ecf872b8ab345915ad2e27e6c7c92669. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT3FC2519669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b5cb1a2997835a0d8cc181e7251568e3fe70c2db310304512f41a676246c9. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QT3FF2588618.