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 0x12b4d811abade4d5978964c08bc05db3c3033f92a38849d9490ac7766d06cdb0. 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/4bfa300a-269f-4416-bb07-b8dc8f73cbd2.json and https://artists.proofprofile.net/proofs/artist/4bfa300a-269f-4416-bb07-b8dc8f73cbd2.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 0x568bad625c6bcbeacec0ca580fcdf209429c72edd3d8165c5506b66c46bf47f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDD2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d39368cd9590aa46b9d28abb6fe20873be5e194846f1536b41b3a0c4c0b966. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDD2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a81f4bfb485b1aa1e692eec25833857abea938e42db0f9010de15224177b888. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZWDD2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce352f7c54f2197c313c1c7f559958512548ff9ee62ad912b6af54f73f82f9c4. 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/QZWDD2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b689c0f05f785c897ef425c283384bb605b0140f103f4344e099fa28717de5. 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/QZWDD2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce352f7c54f2197c313c1c7f559958512548ff9ee62ad912b6af54f73f82f9c4. 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/QZWDD2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a81f4bfb485b1aa1e692eec25833857abea938e42db0f9010de15224177b888. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWDD2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b63e0b51100d8cd541afaaf50cbcbcb298d47cade99976e517678937b917bd. 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/USCCW1611181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4d0129aeee6d079fc752c3031bf331409ff2835fb35c75de49b8db2bb47b96. 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/FR6F32100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1bf62474ff3df65777e445c8e1359af8e011c1636687f77ab72b268b3f14af. 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/ES71G2012285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2f23018f9ad7e366bffa0168be79c27839a11ad848bd28fc0489c18a243e29. 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/COA9Y2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5472e03ef9d22f864e6b69eed7c9b6e00e2b449d8fea6f7f0193d2a3e6413564. 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/DEXO52082036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519bfb5037cb853b9369c991c41236037b9714382b2e5663bc955f4e75b0431b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCCW1611187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fabeed2f530f795b9d2edb09176320e0d0836e49c15023a8da8d0bd0c953da5. 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/USX9P2030097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28a7bc4d899075ca78cd4a0fcc7a041e485d42ff6e27dc29924fcef44ea37fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US6DR2102722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8564b368778c7b173067a2e078ecd4249a3c0e4cbb9b2825a892acc4a52e59. 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/USCCW1611180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e658dcbe159ef1b958542c95abfb91f6c4aa682c86e391703edebcc33a41881. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKZXX2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f138b3db1acc4591c96bcef186ea44d4d83f0b15e27ec4a548af7b42e72585e. 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/USCCW1611182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933c8b6812a9eba0b0b79467c15a3706a61df17fe80e611d59bbc730fc2535b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCCW1611183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718fd771b069fe95f74928bad30dd3d0edadc20c7d274f4b5a40fb75f8d1f42. 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/USCCW1611184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb132de326a1162a638bf45431a578b8995f3f83eb1e65068dd9c211104ff1c07. 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/US39N2300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d8c19eb75d5e553ae94838ee11f938b9488beb4affc2ce665962b0dfabe649. 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/US39N2300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbacad964c7b9bcdd88e58edd2fb6114f94a4e293f1350ff476245cfbc4721e0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US39N2300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8210652c15e76e141892eb435e4774542e1150497179c36b9c8b3fb1cfba80. 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/UKXN22211494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcb94a6cc0661c78292b26fb7bf5563e3e58c9705c67067ceba522369033d5a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAN132200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b684fb2ae7ef6095a9f73c6e144032724110769e6ad2a049f7a611dd63ceb18. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/US39N2300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fe8333b59f35e94d15a0f9d3d5318d950cf0a6ed742d9bd170d4c74dbc489. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKXN22212857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53020f8ac8d2b14de4b07dd0204e51156c75da140d616e4947d9c148a36e063a. 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/US39N2300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa960724b9b0dac8163dad02d090a272d9798d08b684ff9412beade8e1392a04f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US39N2300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfafffbf5c773a39723001663934b2608b5424595f3059c699200054455c8eb. 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/GX3Q92365186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcb94a6cc0661c78292b26fb7bf5563e3e58c9705c67067ceba522369033d5a. 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/CAN132200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fe8333b59f35e94d15a0f9d3d5318d950cf0a6ed742d9bd170d4c74dbc489. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKXN22212857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8210652c15e76e141892eb435e4774542e1150497179c36b9c8b3fb1cfba80. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/UKXN22211494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc763b40229aa90c1b4dfaa42788016c9d063a86f3dda791b01fcdd3402f9536. 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/SE6SA2129121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf746adadec3f26f7fa0d46b84b265127f9235234897cdeb708bb28fec12c6326. 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/SE6SA2129122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ce73157458af9821367a895c6814dcca1c54277c7dec58223d6c1462ef6d11. 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/DEXO22025512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e35cc30289fc2e2a0a4c58bb4ad162a49dd1f025195f65d02b673b24360185. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEXO22025514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb8c3b64bc49fcf63b84e2d22e3b7df3baa1a75f18121070b70d00fdbe4bfa9. 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/ITH641811044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f232bd7c5d4691e9333f25132bfd1f35b672595cf2d8baf8796c5d9ddf4957b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZDA82408687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa960724b9b0dac8163dad02d090a272d9798d08b684ff9412beade8e1392a04f. 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/US39N2300407.