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 0x06f182f490cad10021909c34c027b7648ef1911dc1140047c39ee87bfe8b2cf1. 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/b2916c60-a345-4a94-9ad6-874e8b344896.json and https://artists.proofprofile.net/proofs/artist/b2916c60-a345-4a94-9ad6-874e8b344896.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 0xa4fa462aa9828c9cf5ec46cae2c4965cac9b1459e33cf28c35ee5a5cc2ce4d23. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZHN52379639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc18a0dc97b89364502b20f15b0b51a7cf6e179d5a7ad06f10f24d881e3f16b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1971303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3b5a0f28413029043f830b26583eb066ea663e3d3611c3de91e0c5d3cdcf75. 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/QT3EZ2437229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59126f6d074db279b8aaf99710543deccd5b2756f25d5143630e81db6522f4bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2354831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f1a9fe796711ecf7174e7c12cbc297a686853b176dd320488938dfe612134f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB72299522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96086a20cd3b453c043b9d3b1bf2654b6130b0b75db09d54803b238c6249a29a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAY2239689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a2d21ded950a4ccd3c80926f14fdc37eed15c8d2c93c4dfb1edf2220d7472e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BK4DA2202738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ffd7986ff3f6f3cf578be1e5af797d3a8187c33df29fcd3abd1b35bdbc4841. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2284987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f46dad89f6bf43b50848d5a07c62e847c87cd70cfc2caf57641f97bbb8a190. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2270828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8bf2f77e4e1b359e4ba83a222151011217cdb1feb20b21f5e19802624089e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2078352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13cccac905352d83c72513a7ef2e2039322369496a96a1cebcd61c1dc4a1d1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6P2001879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258ddc559b77276019a89a992dc184475e54e8366b05c5d4fa48a961820f601. 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/QZFYY2098537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7436c57ed3ad7f3433d3f27d01a82d2b7126d9f7c6713c605a2c724787b2e23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN32427359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0f05d488ceb61c55810133cd207c345e438d04ae5a0599fade0fe7080563c8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32427360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bab4af9ff5b2a79baf9116db90eceb3790c6027a1aa8bf64e0d5d31bf0921ff. 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/QZHN32427361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b0d3c6fdc98efbfce736a7dc049972c6a3104cc2ec0f8010ac7dfa339b4aa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN32427363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ac2ec6378d38f596f200773ee2f9fe8c28ac3b80567f093db4d753dc930f1b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAT2390590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9001b4172f03dabf9aa7239907b8233850dda74c7792c011bb350ceea2a070. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAW2358038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2288549de42049473599580fb5582ffcab6e1dea0c31fc8243d46e7f3ef08746. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CA5KR2323131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb041772ac6218ecf7f243eb52e18473aa981f719c3a880d9e3d9275a8f1b4037. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2323134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95542796abe2e44e93dca0e2aa42904a282e2c6592ff4b77f6ffbce0a61a48. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2323133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16fc6ebfaa0ac488058f25aafd3cff48584c3dcca9feabd0873d814ed89260f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2284984.