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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0f54334fa7eb7261583028183812479f12c0157ad2e7f712771a3b92240b0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/162a46d2-1452-4901-a9f9-18b8fb53886d.json and https://artists.proofprofile.net/proofs/artist/162a46d2-1452-4901-a9f9-18b8fb53886d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91815db5373ec593d1ad6673e77cfbbb6960783272d69480794dda294464f609. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCACM1616033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a385a9810e0f057e76c29e3a10229671b34640faa8f10e1243359e63d30cb. 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/TCACM1616070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d636ea9a9bdef672f18aa0ef4f8923aa323bf48e299eb8b33bbf1da03a48576. 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/UST8K1625871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf53a2dcb3989b9543cbae03ecc9404f5e0390877da689068ab4162c8b96f6d6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZ4JJ1719048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ee081638878b2758f6d25ee9a667e0bdc0fe0bef018990cea71cff2010f50. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZ4JJ1719051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec12642e8c25ab0cdeff699bab3ba079ba0e5e6a9940bcd9ad3aff1470d2a5ad. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMPKX1706315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f770e86bba21381969af605602e3e996a8db115d11de24c7db22f4c4e31aec4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBKPL1789481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178130fcce3539d4de3c745fc5ca85a8b82cd849e18c73cea78a7c18ff14a726. 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/GBKPL1789528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a4f591e871a9b8d2219182b00289729c13d54caa7708eb2608de665c37190. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKPL1789480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb256b19826f2f79f34d4012dfdc2beaced69a5f98b97cf0cf4f3aa6d6b115d98. 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/GBKPL1789531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2df13e488a7ce5353ae7a0260cbeca2ddc884ed69acd2565be69f62b1fe847. 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/GBKPL1789532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9decd6440c6d1f5ab6d5b794c816e8cc6d2447689107f2779a40f8238ea824ec. 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/GBKPL1789533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0635a15b338dea738a16f08686968461f834e2d23f581c85e40a48810a6ef92. 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/GBKPL1789530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782b2c92c2ba0ca7f6c8d0feca9c1eacc5ab83a8fd4187067243e1377f59e1b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBKPL1789524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86f6bc956e6ddc5bc0dc4dc59997576be0971621297f2a2fe8e50d0263a2d6f. 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/GBKPL1789525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f599bb1de13037f37fb8b7ce57a66ce60735f7eb68506a802d482742cc91c6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKPL1789526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff6469102fe379a325c741ad02574455d520fc8b119737fd85bb3a20d1a3b91. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKPL1789413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313bae3932418afbb99b005ae9bd9896e816485a056d6f10e5e8d470f7b032d0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBKPL1789415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a419abde198d4cd28c5586a43738d73c105f6ee97aa4a04fea86a9d328c24e1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBKPL1789416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8bf173c9dcf25b724b49f4698ee8d40ba756f353b8f776274a8f57783ea44b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKPL1789409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00d33e4aa16a008998c295eb014df4ead23744cbf6393bd5729e908a35fded3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKPL1789410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eeb5fc2ff3eb4bab93ff89ecd0d8258fa393957cf6491119adaa5a1e8abe6e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKPL1789418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd71b231d8ae8a8c71f93d3ba57ed35ab430242baabcf15ba9d6a8f792d2bd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBKPL1789419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15407729338195abb6d1e50a669cbaa6d7e53244266e9b7b75d1b151c3a30872. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKPL1789412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d9adabccb9cc70fc0ea16cfe6cfcf1ca465f09a2f8b1c1272e5189b90e4a21. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKPL1789414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825131d23b50a5fbf54aff710dd1337d7be341d5f6d0f98e70e7522636f58f99. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBKPL1825449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505ed7ec8dccdb8fe7cd197bb10e4c7f569b7cc80409217b3407e9fec521d9d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBKPL1825450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363e0dd53bae61a43fb5e20e0eb0d923ca8d370261e8af07f3294daf7e214d97. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKPL1953303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a71336c5fd95be055b573064df5876ed055ae661e8809607b29eb1a75c4b3a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBKPL2093914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1633d83ddf2b5dacfdd6c7d9138cc0315d0184831511678e1d614a411a2b39. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBKPL2095497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ab9f080c6884088d2a1bb609a294a0fa3fd1ea42824d7874667efde506ce9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/GBKPL2095503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa75d86719bda83b91c69b18b3358c7a6c5565c2ab10de86ed236a61c80fa7e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL2095501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382c8abc65b91adfb338ec8aa644564261125211942b5d974e9f8f99bd260eff. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKPL2095502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cb2a61519444ddec298b156f08c6547fcbb04d4f65fb7559c5d8a3b4b0d390. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/TCAGD2232327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf7932ec58685d192dfb29547aa6a935069f6fa1665b6f75ded04dd1cda7f0c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCACM1616031.