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 0x275f9d6cce4289789a1fb94452d8e1f3d022b1c8198015fa5b645a1dcde0ee89. 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/437f44d3-e7a3-4ca3-b6b0-e7f0d3c44874.json and https://artists.proofprofile.net/proofs/artist/437f44d3-e7a3-4ca3-b6b0-e7f0d3c44874.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 0x1d71c5c474c9b32c99a2b47e412424e57d3a30b370a03db186bfa095a3d2accf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTAT2420432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cce3f2cb8ea9ba35bb0bdb9634605cf31edd9c0fc01247262370064c61956cc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWV32440292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797928e0d638f345f7378663379d564cc3dc5f32e4bd4b9615493f53c36f3cd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:58:41Z), 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/QZWV32441289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722e6fc5527635417f09eff47269b6800023e85d4862684f0915b8a1201ae1d2. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZTAT2464586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba755222a327aced9cfb781041dbe461278423d705c364102fddc7ca1f3ac2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:56:14Z), 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/QZTAU2464043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013a22d51b9206e05a2260ea3391c55163d0dde871d22a04ce20566f22335169. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:03:26Z), 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/QZTAU2443588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad462f88891c48e0f9e5a64558cfc9a7b6378c4ba6d6abe0e7d0dffa2a22cedd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:02:37Z), 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/QZTAT2495128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e23e4397943b3aa29133fcdfcbe0a570b70a9e9d0b439317fb0bdd84be38187. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZTAW2415702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c6af9a108746fc268621420e271540205f73b53d57634ea8968600dcc0307. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZ5FN2522572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54296655427041e26bf46a0fe5d3e08debf69fb63abe9459364f39b35df40299. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZTAX2427541.