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 0x9413a2bac7091b172ae87d8be7c62e1a14ad8ec1fec9c23a0944d9378fe53b17. 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/89071ae7-3ce3-4241-ae4a-8d0714f5ece0.json and https://artists.proofprofile.net/proofs/artist/89071ae7-3ce3-4241-ae4a-8d0714f5ece0.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 0x800d0c1ab6440ff2b0d7809fcde334816c1d87fa906f370881b5dde3047d0370. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJQ2537370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4376e800b2e1ab2270ec75973be7a1b0a641359ef46c65de48540eda2c20c6. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCAJQ2537371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb5ed948fe93bc4e2527881e5d737406c2704eb73528989241a5b3fcc20798. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJQ2537375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bace7b58c22d35a555723c1a893695e02432afb5eefc0f4341ccd9a4ee11b59. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/TCAJR2537376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9d6015685ed06e0b0296edf74285224d0c4e4e19acb80274b86d5fc735088b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJQ2537383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83c1f7b2fb2ebfc1334d40e8dc7c8956864d4ccc6fc5d598809c74ea7c13fc4. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCAJR2537391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a977162bff2dc31b81b3617246eca0d646212a32f6dd1fd320c3897fde4c41. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJQ2537395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b6c59d8de874475c70b042df7e0d76f80049dfd2519e2860fc750003938d9b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJQ2537398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47c7a7b4c6762f177d2cd6ab1e6e171b5557ff0f3ed534e5a107ac1cdc21f84. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJQ2537401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6bd5dad4972e995875574dd9a6c03dc6d27c4912425c8cf5f05f028ab7c8c. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJQ2537405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf445aaee184107fb75ff167816ad2ef25580eccb4d4e445118a1bdded9b5136e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJQ2537413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedb98d111e0ab7b418f3960a87f3d8e5693665a26b5ee91379501221929118f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJQ2537424.