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 0x4e18451d0391fbee512d730d536b4dd9f0cb75a3fb0f20277280860027d0980e. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd72e1eb-5b54-4f0d-b62a-869c09dd8714.json and https://artists.proofprofile.net/proofs/artist/bd72e1eb-5b54-4f0d-b62a-869c09dd8714.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 0x64b0002a8c0baca723c6fabb61b5622ceb9e65d55b596b1f23f2ffffceab81ff. 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/DKJG52102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc515bcbe3ab76fba60cd26dadf2476a1ea21c3368579ca0a9b2eb0263aa7ff7f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKJG52102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b9608aa2a87cdd7cb4b440ff6ceb7a418790e1044f6022919eb99ba4fd32e. 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/DKJG52102005.
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 0xce2150d1b432c2fd5df5b923dbcc243f3033a7f984f8f5c4a6e5ba384eda48f5. 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/QZDA62434194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4442bd7bd218d727b77f5a5fb857aa1ccb1679418790aea9a5cad0e0909b8750. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DK92A1402401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02aefad483ec7540d970ddd39c2c784f74edb10bff063df1cedf45605bf910c. 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/DK92A1402403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2543023c62ccab9c2753feef3be111abf730b2ae4d5ac6409a9b314e9a466a. 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/DK92A1402404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2dfdf2c233b9ed0c25adbbb8ed8b823e4835b24cadeece32c20683758e1b26. 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/DK92A1402405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab752c5a7fa2512c6bc06fad3073033b0b65d67e5f0738b9437baa369139664. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DK92A1402407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90936ad27c68582b0a754adf7f853e9178c61a12469f8d35013a05382a6c3f8. 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/DK92A1402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99976eb25824202c0382776e9edbccf26d97f8fff832eeda7ab1207daf8fdb. 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/DK92A1402415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c2436c0aa882b7bcdbdc62ac3522e13eb9d76e3c8b26a2a67e248dd7997ce4. 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/DK92A1402417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0e685a1d70d6705dc035b3672af3219c766072a42076f562a10de14897552f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DK92A1402408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde9776b4c9363d205f2d998ef4a048d40193c4ca739bce682d7acc46f5f6378. 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/DK92A1303303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b24c006daa46fe157f1c1a1d25b9e3ea483f76b5c547f1d9bf676d88c7945. 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/DK92A1303305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d885d9e20c4c9e8ea2920078b1fa8bced6232d2e3f3c36dc1e835950b2be63. 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/DK92A1303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e3fce0e4be6be863f1e52127633385dba10630ac2bc999a9a9590084766887. 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/DK92A1303308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8752dd97b774b0cec958a3554464e4ee34de6e01fa8e5932f9e6b91c4f6370ca. 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/DK92A1303311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2639eed7ac39fc2b9842ef55b141451fc1f8de3aef5ebc51cf3ede6c274ecd1. 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/DK92A1303312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e1560a1fb21a9bbe9c93ff1ea09e15a523d5d4efe48b5134f821d4e20d060c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DK92A1303304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ab9be906ce31eb28249a0811656835cca979d7e6cf61c9f000b649ee4b6dbb. 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/DKWL21200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff99296ae48ffad2e980055be40d799a1f26906de3bffab2f235a3904c935a. 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/QZHN82293552.