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 0x96cb7e3dd4021a716b582484265562036144182fd05a052803cb1fb52608407a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dff4e575-ae5b-46f1-971b-ad2e8ea7daec.json and https://artists.proofprofile.net/proofs/artist/dff4e575-ae5b-46f1-971b-ad2e8ea7daec.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 0x45f288b17b393c9ccee3cb0ce819a326d805e3d8ddc47f2cdb3d222483355c7b. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:21Z), 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/DEQ121857592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67be21547399af218aa9e58c9efa4af5bc43eec550f96849698f52b115d5846. 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/DELJ81876866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7687be519426d0be0938eee6f1c50760120a82a66832ef3c4326243c5cd0d2df. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEQ121857598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f288b17b393c9ccee3cb0ce819a326d805e3d8ddc47f2cdb3d222483355c7b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEQ121857592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67be21547399af218aa9e58c9efa4af5bc43eec550f96849698f52b115d5846. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DELJ81876866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7687be519426d0be0938eee6f1c50760120a82a66832ef3c4326243c5cd0d2df. 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/DEQ121857598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efb09764131a4f7f747a60ae3a3fdfca4425e5d8d22814bf7f8422269586a93. 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/DEQ021806654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ae0bf6854eca70ac3b1e1f79c276fb9aaf1af7617ec90e2c9a2fcffbeb495. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEQ021806665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b8b508c876904676eff6e74a74ea4a43c4c405af5398018a347b87c7bb5e14. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:26Z), 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/DEQ021804391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc135940babaa709694e4b0b10062657624a35ad62b1515865b618b9d71e3dbc6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEQ021904678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94869f28613eb680cd2fe34e1fd40a60f55cdc9883052732617dffddfc41804. 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/DEQ022110656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964614415ce9cd17dc25333357f25d114993a582ace88c7a93ea6acf1e5010a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:15Z), 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/DEQ022110723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027c8d09117313a37054f1f79c339a053ed07a28f2262411b4d58005c7b3730. 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/DEQ022111095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b40cfa5c5ddb03d7cd28837a3e426f720ee91255d07ab8551331fe4f10046cc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:58Z), 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/DEQ022112396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64af49b59e274ca18f35b176a6f3f035104442561a2e7ee553aac2f8d9a5315. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:45:56Z), 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/DEZC62264789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e18b652a06aa41ad4610831792449766016b32a7de04d1472479c0862bc2402. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEZC62203943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a7292d71b55f7fbf12198b913d401fe7a9f9522b506035b4c1558c68f0a4a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZC62329434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a4226cd958ac6f22e6945f8c636d519e6c20aaf814d5415df7ee955ddfe37b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62407316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf408b445c94dcdf807e09386283106f2bd98e61e12cfde244316bf014eb7a11d. 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/DEZC62433917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a4226cd958ac6f22e6945f8c636d519e6c20aaf814d5415df7ee955ddfe37b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62407316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203193cd53ba49e609b5cc32a91341a61a97346041c41116421957ef134f7bce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62448591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdec7cb0076b222a69e28dc621dd3d3d9f5bccaa93d56fd95a9ec169b661063. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEZC62452845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db2bb3e9b0637430b056dce58b686b407c2b3406ccb8690745573e576ced38. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:32:05Z), 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/DEZC62456309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c20d489fb1568631e0c95cafd35d12eca54eb2e661db072ed1171cb52eb0a1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:36:31Z), 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/DEZC62572951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c20d489fb1568631e0c95cafd35d12eca54eb2e661db072ed1171cb52eb0a1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEZC62572951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f920dbcf1ba2e014a637118047fa85f70ef6c885453e6d5c553e42708c6b51. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEFZ71600323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea4a0339fdc2b31cdc2de669643a63d181a8cb49447266327e775067541526e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEFZ71700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb226eb9224be8fb9f7d71ddf59ab79b378b1242ef59f08cc6d911587bf9e218e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812193258.