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 0x6d64f854cd36e5d34c2c6030c6baebf3d7e853ea2483a1c0d96a26334094264f. 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/1481d008-1080-4faf-8b4e-02760508cd70.json and https://artists.proofprofile.net/proofs/artist/1481d008-1080-4faf-8b4e-02760508cd70.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 0x0043897c9f800738164e1d4a6a3e6aecef503c8d1ef240ca879ebb8b6b358c39. 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/SE6QE2226605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9566f0bafb4230a7cf460a388241254b3efb6af92556a440d6f59360df58461. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2240666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556950fc9793d68862bc5e8dc69516bd661fa66bdf957a23d91faa8ac5d73c3a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:54:16Z), 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/SE6TI2379871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce163ac0555afe3c79c71be336985970f8c79d7a89f96057a887dd300a0c61b. 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/QZNWW2327381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be8509a429dec5678ca6b920b576b124689d9495e35607644b300d9ac213d95. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWW2327385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceedfb3d20fd42c955b9ac4a8bc047437ab91abeb389697704cb6f49ec0eb4e. 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/QZW9K2384950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6d848ec0f41866d888a700d4eb0b7ac51df1011cea74b15f9574a91c283dcd. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/US7VG2470175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a300870022f3fefa6d9741683b271657c2217913d60e2b5279c3e00e3d36aa. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZ5AB2483377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f131779df618ae8298f96026331c2d9428227af506f1d638dd1bddd1db8350. 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/QZMZ92406555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba889ccbc15095a8b72bc970ce37335b1de296c987473d14786dedaad8fd35. 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/QZNJW2431479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1729a5a1f82da0a291ab0b601a0ce14791bf6432a756a79bb226f29287d85c9a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:24Z), 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/QZW9K2454440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534773a19711f5bbf0545ff26d9c20b9b0c7dbbb9ca50f6bfbed4636a73533e7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG2520827.