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 0xeeaa0b11d9111f16a27a224ead95a1b81f93f2dab318620dec0e834f322ad8a0. 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/547e6633-8d89-466e-99ef-c08714e51fc4.json and https://artists.proofprofile.net/proofs/artist/547e6633-8d89-466e-99ef-c08714e51fc4.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 0xd5521aff8c9bbbaaf130be52e76c063d498ed0c19f596adb4c38778d6bdf3a1d. 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/CLLL21300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e287e8e18ff91d3875d7ffd3c3e4203cd6ce951050a63b482e1557c192770. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL21300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f838aecfecc08d5c361c3f3a5cc22889caa4ea7325c6881713a9b2ab414b54d. 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/CLLL21300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e43df465ab3d60ecbe589061dd30260a14c5603f7719fa2a82230aaa8e49d5f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLLL21300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c80425a76fdc7805a35ed0358b3dc5b72c524b99d383d2f73e96ac7b5e8203. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL21300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aeb33863532e41211da896690fb971e409ea93a5ad28f05a27e2860a77fb8b. 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/CLLL21300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2457fbf571e3c435ab6df6bc03d5f6eb3332a9f470803143fff60912ff3279e. 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/CLLL21300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b20d2dfd8f24f0c515b2399c5c079ffd4ad36455189c237fec472c72f51df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL21300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196a97338881281b6e3eb060c5f407752e1f24e1b7582fc933dae860c63a3c5. 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/CLLL21300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fdc6ac0f440dfde3e0cfb98fd59436c2f46a20c50f08d76d33529f880b909f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X41859802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90052137820c3454b5b4c4203d697febbf9d5137a919b9ac63485511ad1fa632. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X41859803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a2136ea8c20056b29f8647f5ffc1c5cf3ccff25b5d435e03cbadd8a6a7a01. 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/FR2X41859804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f932d9c3432bf0906ffe0546544edd0663af7a2f12aff9231261a5373fd9664. 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/FR2X41859807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463d6bb766fd041ea1018129d064dee895b567418c4e73fb4bea6871e2345b55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X41859814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc23b9c9e2dda5ff8db46f2b6b55013c1c84948efb3a974ee46e5e43be0e7c72. 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/ART0G2002836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad0ba17dc4d5704a1036ea04aaea39eca6bcca0c588e18a8233eef60efe1e81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLLL21600389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f699ffc023f82489e252f5cd97708b6fe1c724469799fef05834388e216dd6. 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/CLLL21600393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563bf33501a9a42dff958c6abe55d17d0970b08c29e1a9745f7baca5f44794f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLLL21600396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123aca56edaa9dce840171f48ff9e55079ad962ca31d4507f1f2340bf83cfc77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CLLL21220001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880cf75dd1b60cccd2a6d3cdcd8fe4231ae316ec6284495e3d2a684bc20b2f21. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL21220002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fef188529d1687e64d8db3a755b0afa7294da3f34c9663cb5f3c159ee8ef61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL21220003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb298b516901285b16298b22142ec9e3a84788cb7a028baa9f2f268eab86d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL21220004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf742cf8b4e84f6b8e681d2f69661bec6c31d48e1b11914114ae952d4ad562c09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLLL21220005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac8c6dc2c735ee92c1cd1a5a1015247895b0fd05b938e6029eb7fd8e2513bf4. 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/CLLL21220006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5c02d48a4daaa5947450d8fd5c02c7bbde12f72598cd890b700fa4262bb321. 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/CLLL21220007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109f40e262fb9b5147ae5d4e17888b1514c32c463216d4cecf8452a40b492c94. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CLLL21220008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e47107d849c5d871bc85af48c9520b22750036a655a898b61ca728a1c070193. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLLL21220011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa233d971b0007e4c32d6457b4bef5c001015f45290e76bdc23a6ecc56da901. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CLLL21220014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d417437624c9b4343fd7140e34d43210823e60c90e9800610bf43fa87ce67e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLLL21220015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2c27c831f795d20913c851a10144cf8627e10ae95d9fa990bd8ccef9a6f3a. 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/ARIXB2401937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1548794f127aeadf4c068d61151d212067e935b17045aeecb9d5e72e4eac680. 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/ARIXB2313017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5834b87fc04eab4b62ca3fac5c335ebd7f3c7931b82965032427df03187a917a. 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/ART0G2002787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee6c2da4d4eb84648ca37ed29c934e6509b1bbcbb633f9e87d73190d9372266. 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/ART0G2001079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a42bb3396a7ce683f4a99e8fc9bcd31468d44f46d683e8205b651d64d6ab50. 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/ARC571901588.