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 0xb4504ff2a449ae7c2f56a5c05a71efe191e04191eedd805e72f12376ba172134. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c30c4e50-7ebf-480d-9de6-f2fcdd63fd4b.json and https://artists.proofprofile.net/proofs/artist/c30c4e50-7ebf-480d-9de6-f2fcdd63fd4b.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 0xfab1c57744d2ec037c32ed8aac2502e493b237520e5c7a584b59e887d56bf678. 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/BRLCZ2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f4bc7c9b4da0dde059d9c312115f426caf7ddbfd6ba6b111c4f602c4210864. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRLCZ2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb00952d8a00627268dc999025f4a97469cecf5aad210f58d8300a8ea38b14da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRLCZ2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d547f1c831befcec2ac61611363e48687a4ecb538abada5f548ab47c8f61a0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRLCZ2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be1077b5b7da57e70531963eab861e89f94ac9af1276283f502d0fa5b024e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRLCZ2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b322fd5311a4b8cb91c158b9593e4e61b65349ca83bdbe84e688de8e4860c57. 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/BRLCZ2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d02f48f882041ef324cb1f3c0f3c6cdfdff3c828dfe3f5224b0f169e6dd9dd. 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/BRLCZ2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f77ac3ad184e00298111085fbead52c6cd9febd1cf56dc5ae5423248636fd7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/BRLCZ2100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96274857595c25664b352b078a6698cd0ee51ea3bbcf3f4bd6de9f4cfcdfbc0c. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/BRLCZ2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8b45e89a416422133a90d58da27de0cf908780a02788e9e9ca5220269e672a. 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/BRLCZ2000001.