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 0x9e81a64a7e2ffe1aa5ebc3357a3e4c5e7f52754b7a820e26ba72d99ee9095638. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d17fde0-5f1d-445e-8447-4c2384546957.json and https://artists.proofprofile.net/proofs/artist/7d17fde0-5f1d-445e-8447-4c2384546957.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 0x72aa855767e67197cbe96f84684e68429ed1b7e0efc462d56fb736013154f1ca. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES82490222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76d5cbf4cea7a510d32de0be21d62dd2455403d11f1910a6d1427ff7d2ca931. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWV2459877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c11ee2b443aa728ac3d294e0a8059cfa23a614d3043a5df732e11bf0fa0d34e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:18Z), 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/QZWFL2407274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0131f72bc9caba18847fff56ff1905245c2e7ca4a7c112965880617ec273645b. 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/QZZ7L2432633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e32e5e4fbda9fc416c0d32e4e3bf6edb334794add844a24b1411d36c84bc2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN62599937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe803e0305f58b153f922ad8962e33ec40b258d4e1c38ef05a1a81373dd4bcc3d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:59Z), 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/QZK6J2568222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbcfd314b99c85c3d279761a4b0bf0c073eb3dcebfaea11fd0ad35c049fac97. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWR2533370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbde8dd6eb6fd382a6b99dea588140e6cc74ba7104b03415d6b731135aeb606. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:42:54Z), 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/QZWFF2589006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80d106b1751ffc784ad4cb993901b12e8885ff4ed7685360e13aaf4870b494. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFK2518418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc77165ee2e33c2e5194a6830e9a3169dca1db05f7dfdc0f1e116c86f16278. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F72599259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e392d9e12e690dce13293f9c9bc4fd377df1f097661f77ec4c03d1b0e9c8aa. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:25:54Z), 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/QT3F82502091.