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 0xc494769f651d33ea20f9af3fffecf6251bf8ad8fec5b8b3391886ab31a4974f5. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/050e267b-9353-4f1b-bd41-1e39c30d89a5.json and https://artists.proofprofile.net/proofs/artist/050e267b-9353-4f1b-bd41-1e39c30d89a5.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 0xc0a5aba3b14fc124b8ca089461a8c57322be0af7b8433cfbc30dde4ed5a3da98. 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/USA2P2234719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f0f67398498c978a8cc0e3e29cea2fde41a211f8104570affb43110ac42ccf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:32Z), 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/USA2P2234720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631689fd44e08f3f9228de23ed3bdb307a52d93102286f9b8c9f8b12042e1900. 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/USA2P2234717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6facd8539b80e039d87dc729643427644b72a86758e39d638352959bd1088218. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2234725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3dc830f17bb929c20906e735c4a69d9cf1053234f5b48752a0cabdbff57fe7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USA2P2234724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d355048e663c7d1dbb2f1e8ed369e0597c3d649a28ad5f320e9d78fa696956. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USA2P2234718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e46f9bad9fd76a94bae9a3605d391bef7e88416d261597bcb127344e7a1e2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:37Z), 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/USA2P2234721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f7888f4da21fdc0f944f5fa757ef9a3e1986d28651d1ffe1fb2980af24c0cb. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USA2P2234722.