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 0xd78cffcf6f36241378eb0b20b0143c0eb6f42a7fb1b6d60173e98c370349bf3e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af27a960-8e33-4a98-ab07-4b77fbac1a94.json and https://artists.proofprofile.net/proofs/artist/af27a960-8e33-4a98-ab07-4b77fbac1a94.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 0x062aa26666806539eb03837ec6a6a44e271c90ced219154c70892328db4f3856. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAY2281293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4165125b79b9e44bb4cdccf26353c159311390be9b950ee543ca1f322bb79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEV2472319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4bace59095751badd9e5bd2ec4fa014abdcfa78b916d5dffd6b4d8c6ab30d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZL382431702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac6bcdf67747b5daacc14d0987cb0b160cb0979fc2ab846bdda46f336a2214c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEV2472323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea681fdcfa01e2afc905dee5b806b6b5b10784becc81ee425733c74f7ce0bbd2. 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/QZMEV2472325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0e01986b6de04944dd8249d51724f191b90cd3d2b562d6d307188e5a3f25e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEV2472328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b2c31f2dbeef4f0ffeeb156bc1750e568ebe4d336eb05ead92a06cee51edda. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEV2472334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e18108771d117f8ea35d8dc5831cb9f9a00df470eef2a8f1639e041a520f2f. 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/QZTBA2324349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce662dab8ad6af2a95bee8b63700356767636c17f963a96588d174721342e0. 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/QZTBA2324351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede23e317f5d041ddd165ab9dfb67bd311bdac39d7a12695f98fb365f85bdf48. 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/QZTBA2324352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc6176c7b19d4abbbc496b442a4082b1b478561fa732251b2fbaf0754701247. 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/QZTBA2324353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122c5c6d54889e873ada300f911a245bfb6c3ee2bd1aeffbbc569e81a1351cb0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBA2324355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f7796b518b9c59f0130753a2c711d17a3756e751105913dfc77d0adedd3391. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNMU2418118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4bace59095751badd9e5bd2ec4fa014abdcfa78b916d5dffd6b4d8c6ab30d3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:59:58Z), 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/QZL382431702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b452c975f6da27276698ba8394c786db5240f46857bb3b698f8ecbdeade7613. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAY2363913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54bd2b109729518a003545388d64af0e1f4a801dded395fb07820e4c1733483. 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/QZTAY2363917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b69891a571db1324b2e3df07ce5bc4e0a7690bc9f5ae6ab8df49000108aaa2. 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/QZTAY2363919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca1a4bb8c3fa4e134843972916c5b37987965081e9c70b687a9224aae07a76c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2308756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134b22d3ea6aba43b343465807d8af86edc177f2c733c385b6027b3f9fa5febd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52306326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a3ea80e552a36d279370f3f1fb736aab017cfa8919d66df1fd77fa9f7617f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52306305.