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 0x17407fe21c44c3de419c4033cf093e6c41f2e3a3d626f17534041034801fee95. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e67cf03-ad77-4016-ab69-0630c00447a6.json and https://artists.proofprofile.net/proofs/artist/8e67cf03-ad77-4016-ab69-0630c00447a6.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 0xb40852042de25fa3574aadad14465b068e61812d895ef58dc0998e5ddfb596d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81518530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbeda14f2eafd711d5d7c9dff8d0e5e5824a390886ffa0df851ccfa6f5938aaf. 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/USHM81518532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaac7753670714c6d1869421b8c681ef934a9d26ca63edb1231ae9bb2f2922d0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM81518533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb4561adc6ef297dc0c2a7d280d0cf53c14a9866de16ad2ea2ff7d317f4da3a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM81518535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613f7a411f8060b9ba7c376073c19268406dc0be41c23b650d1d04dd25fb37b5. 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/USHM81518536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1563e9ba588554f5ca2eeb09e5975db00d1de1d3c090e06e3b942f8fac56067c. 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/USHM81518538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a9a153e57a734ff75067ba374d5a1f27e5932b7cd0aff4fcfdb12f79b7566b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM81518531.
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 0x7705adba6b84a0e43dad6fac83e432d8d908d7a609a7550d3ea3e13267baea26. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM81518534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e3b41d87aab2bff65dd666bf56505376aa351c3035db2a5b7ce7d4dee816ca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81518537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2426636af5474edf5724319f0aeed8f464dbba3b164b3d15ff720aca62bec58b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHM81518539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948a4449cebd84ddfa8e63fccf2dbd2d966772213fae194b03f55aa13ba0fe8a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM81518540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039a8646c0ecbc00dc728531f3c915fcea92556824f1bb4c7f0c563eeafead28. 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/USHM21272807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8f7b17b7879ac06fb2517eb8ab412d5513f11fd82dddf2870a5ebc75ae510e. 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/USHM21272808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f30d58c5db37399bebdfc03c9cb7a078459e65eaf4c53f052135a2c4bd9061. 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/USHM21272809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0e1f73000e32e74f1e19792d15ed41c021a8e72876b28587d20e2628bbfd12. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21272810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f8c6964796df21e586512b28bb273b888423e051803ff1845d597f3cbf05b5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USHM21272811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd444306cfb2b7d0df397ec4a67b3ba330a0c373297721a17842937c07eab9a56. 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/USHM21272812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd472252bd247fde947f311d41d96216640ead1b8682430be65f190b45a96f486. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USHM21272816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75b3197b7b134be83ebae235f55230ae9aa5919c817aaa256f8c9c7998adbbf. 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/USHM21272817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e565b5921bd98a14d6c34f981bb1bb8f580fac99363171749f9451995094bbf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM21272813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865f649d85c2ebbfed54c5fc1e910514c240105d0da753e7663e3aa6f4eb390a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USHM21272814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb374abff848bb0242fa2d45180d05d0aa94269ec1fda132af519f709530529f3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM21272815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454d5a21983fde946e920d21226f35998d3b20906e4021d397c459704b1ffd78. 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/USDY41900272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5c0ee179be7a7188c60b157f5ab69b9e7c0402a4991a5a31d7423a8460ad81. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USDY41900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6611055f8abb588c8d607ac905945f8fd392e5b012b53df38f54310add829ecf. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USDY41900274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4ad2ce93088e0204254bec4ee0f353af56844644a42ea9aa0e1f0e6ff59dd1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDY41900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31092e6a0678635eca0ba8dc232dc81ace9d609d4197c3041bc5b0d67d2b5c10. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDY41900275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a497c1c55b90d6e3b1338e36a61e0d0ab485eec60d43cdd181736838f964e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USDY41900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f97a7e8d0c6a9db1ce9c3a89465af2ffc3d2489a3afcce8021df3e4e623ca0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM21391870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d17937e0366f463d70b67cd6dd83258efdcb03c820cd13e5beadc56f2fdce4. 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/USHM21391871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514a64f0a7117a9d4ff2e110731a3d35e49dba2bac44c88913a847836b558de3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM21391869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33286f548f68c61f4dfaa8c7548eea9b19df0c714d417c66c93debbff9c5a56f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM21391872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec392e7f2aa59e9da3c77c76a04efa34b80b5e661129eb69ad5600fb80d15c9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM21391873.