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 0xb5fcc6d2352f7b2d8e5ae0969ce03191a550c9683f2652644e5d253f28297df0. 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/7f3773d1-9b12-42bc-a50f-e7b75306465a.json and https://artists.proofprofile.net/proofs/artist/7f3773d1-9b12-42bc-a50f-e7b75306465a.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 0xe5c3516b4b28d55b227c55434f7790a23be616198d4aa15f4809a6989772797a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/DEZ902000947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e83eb38aad0b4a124915f0f2577ba7729e196116fac2bc3e2c17f8997fc957d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEZ902000948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fa2a293a3a267c36a4942250bc92330bd5a1adfa9e0fe0c9c975d1da03ff72. 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/DEZ902000952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06227dc6e092bad7d00b661c2da4e65711ccb3c1148e2ee3dad5dccb56750754. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/DEZ902000953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b7eb55033c103f30dc14a783b0a6dfaa089b49787c32e07c9cd085f70ea6b7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:46Z), 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/DEZ902000954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a8e0d2b71b49877a4e62aba905298f4be6a9f9a7c0ec41ca6f70219ffb0d2f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZ902000957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e2470091b857bfdb7064ea20e63146d36667930c6b7de2e73e5fdfd21e5ae7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:23Z), 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/DEZ902000956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346830ec9464d0b46067d928ab019f7e05b5ef95217280a4b6bda1696d00755. 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/DEZ902000959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b89092779d7b4ece460104040086779afe9dfd8ff9eab4d89011ca0af432a1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DEZ902000960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a7f23560bac827650b08fceca6e42a98fd7a9b6cb891f5c8b3c286854d6a5b. 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/DEZ902000965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6977a92ac652d86181bf16071079aab0f9412e6e8e7637189f6f04283ef0cfbb. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/DEZ902000966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f1374050c0980b37cd6ee8ecf52be2506aae9b39ce1b6d31cd4db789375be0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEZ902000967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554e41412baa807ba58aba5c437f692919a6b9f26735eb19e1c7e85c8b8d351b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:12Z), 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/DE1KY2505878.