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 0x686bdd326035c336f1cd07f6b2f4b00b23a75b788a5b253902d0747226aeac3c. 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/0e8ce14b-81e4-4430-b984-9a772f9060e1.json and https://artists.proofprofile.net/proofs/artist/0e8ce14b-81e4-4430-b984-9a772f9060e1.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 0xcb861dab7eeb22d8141e15ec051d365e49fe87ecea367d5f214d3ea4589b15e9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEBL61292700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa2d2a93ac6feb34393401bb83a2f1d492c5cc9c3a1aab519f6e5a3a3670800. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/DEBL61292702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9800d3a02de6ed1ceaf937c4900888bef93dbb79afc84bdc04a58195931c99ac. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:23:09Z), 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/DEBL61292706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7709a6d0a30e2dbcf5762e22ad03706035ea73b9d029e5d186e2b425def1e4a2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEBL61292707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df7d65919832be6413bd28c59efbc276b86403d3e36f249bdc8b1ebac59037b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEBL61292709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc3bc27f2df2a741374f5edbbd3c7b08d9587965c16b3e087ee634038fd2492. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEBL61292711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab56026726ca623f41e46e5e02a29a2a52982bf6a8da720f88653c8faff3a9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:58Z), 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/DEBL61292713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45a4b85e8a575c1478a4827f68cd473637d2e92ea513d7ba2fdcd54ab4589ee. 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/DEBL61292716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e289ae8454f0ddef8a56638b852a2520885f80d270ffe7ed984bde064ca484. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DEBL60473813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb25d840ddfba4f7ea220c7c80adb3d80841691c5d99b0f8d96cfc99f1e51f26. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEBL60473817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f28c0c2687156e869b853073b3b9ea6d01ff2324aac30c830e093ba1967ce. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEBL60473819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1974ad8c337624745c12d3a1f7a689785e39b7d0c004d5fb85667cc654a054f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEBL60473824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f964d32a22c39b5f32435bcea4bae542a0aaee092d4379013773cc0527ccc. 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/CH7812416557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e0e37fb1ae9efe1950bc68fcc7c7317cc76353002d858cff8e843df9013f94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR10S1487503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae35fba5c1a8a3d60d4ab8516a827f7b7678338738c94dc209d734917db476ec. 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/FRX871571090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1a72188c74e4c4216efd4e92eabda079ed9b2efe64c26ab3372e2c1913d37a. 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/DEKE51300663.