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 0xd845693c6397e60d5d6998fa8171c5ea74a2932e511fc09bc73acf6203734c65. 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/2f81e896-e1aa-443a-9b8a-c60d821c3274.json and https://artists.proofprofile.net/proofs/artist/2f81e896-e1aa-443a-9b8a-c60d821c3274.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 0x9955bce9d26054ce0645962e2a8dc12bb40bb48014ca6194e4b1e7a59a922697. 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/QM42K2388222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd54acca764dd6ff4af871f5f217c6c484e33827cbb56435a7ccd5136b67c55. 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/SE5BU2419268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a5a73d351ff6e4c758b276d6b6a849f7558584ce829512c0e0f37af97f716b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/SE5BU2419269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb773d880e632ef5c5ac4265d3b08685407766f6e082cf2de18e778b6105555. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5BU2419271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecc37f467152fc50fae8c55e386c18676271f0f1fecb4fd36c3b7cbd89a14c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:15Z), 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/SE6A92379908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142ee87957dc9c2e573bc128ea53b39200941526e8f1cf8fda94c2b6f0cf5439. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SE5BU2474567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c431839d438e2ce9c72491958e769fa317001a9d7bf289defa28d9b398e488. 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/USUYG1540763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60faceb465f1feb88720345d5c441071f5d3d8b59ffd5e16576c60c2a23e8c95. 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/SE5752420150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c758738b1b5b6cb31065507d0b0a9d1dde002cf9d8d3294a187f8ea2f1c6fdc. 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/USUYG1555752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dbf09668371df065a837121462143f7a5e0a797d30905079131022e47c072b. 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/SE6HN2457890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7744e7026a85d6fc178478ce7fcb6d66e9b5653e178b74a7d3b10bfc970df145. 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/SE6I32468316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25318ac4965072900cdedbe08fabcd589bcf4eac09451caa99881ec26143da3d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:49:05Z), 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/SE6QE2442466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc464591e0f3237b27361ef34cb8685bfc0f777714e37a3273be78f5efd0772. 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/SE6QE2449075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7488776cc7d5be73340c02293cea77c19dffd70eafa63d3415a8e0ce9cdc662. 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/SE6QE2462147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee28a3ca63fdf2ae4e0173009535099c1c2a9b67ab0f41a509323dc246d12db0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/SE6SA2456999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6228ac28e7df6322dd6e463e20326a53d818e2d6b6e47d1e9a3353291b23d213. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/SE6SA2466947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd935451a7f3c8a2d6255c94a6e6e6c9df4c9b4472bf75474f8431d178a20e1. 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/USUYG1700708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf8775f7572dd4bc353560d53cd37e3e7914ceda3f92e8640f6b8b18d27f73. 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/USUYG1700709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c21fadcbef60a59bfb2fd55d659121061e512f7e85510bd741b80bedac09c6d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5BU2541352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa998f393a4ac6f704e3ef4d7f424483b8cb81eea21c00f9697d963d0dcce423c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:26:45Z), 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/SE5BU2541353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a418760142ca8cdcc734fe51dc64a4beac69fca76912d473427ab3456fc4d. 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/SE5BU2541354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfa4cd291e3fadc2f4b4dfbf696a67634b19fa257cda2aa6259f988f120b915. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE5BU2579761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423414ef3ca0be76ed67d11892ef319442ff9fd900694ba02894ed8bb8df7a4e. 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/SE5BU2589170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc785f617d108ffe27f3f8a9eff29a0b3ce7249a2849f1aaad62d19a0a5f3bba8. 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/SE6XY2565975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb29df487a5448bb0e4d48ec4e2b5cb485b1f6717556a4bb72f267ee5bac89e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:59:51Z), 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/SE6XY2565976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1480bedc8221d64210d62d6456d687bfe1f8318602026231e19300d5ee17a178. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:03Z), 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/SE6XW2567242.