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 0x41341003fa636e1ae8ed551ca4d6ad283f4c9557106871b1dc55265debda038e. 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/06dd1246-f94e-4b04-aa42-4a916a73b61c.json and https://artists.proofprofile.net/proofs/artist/06dd1246-f94e-4b04-aa42-4a916a73b61c.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 0xef60e05b1bd40238bc8d6766c0201e0f43b6b265393da0f91162f4988c631445. 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/NLRD52321121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d32218cbe38d19738e4a592b96939b552c33ded271dea8a2a872d7bd9258c7. 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/NLRD52119112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a27aa8c990113495996f933005de9060a7b7b0de72910a57ce045ffa2b8747. 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/NLRD52119059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093d76c280e4ff4f966953c26a7a9931a26b552877de6e4a475b8ab3eec79f2. 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/NLRD52119043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db0fc81a41e4b99db616154abc6c290aaa9bf39f96f85de517c17c7c7f26ca3. 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/NLRD52119311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5387239d4311c1327f7f22d026014813ca4971f587291ac099a00f711013dd18. 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/UKXN22587946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18ecabb708ef141c62a7e3285f23e67d915ffdf51df00d63a1bb522cc4e1ca8. 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/CBEYJ2476534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa037b66068e2048492a44e0eccce95cefa77dbcb6b39ce3c6131981c71c55d29. 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/NL3M12409068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712052b29c1cc135edf15e3851b70f11c7ab21b7350ca2a55d2012c365bac8c7. 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/NL3M12409011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6931af30034e8d906713784ff9da69fc4eed8e9645f236e5fdabf866f59a4340. 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/CBEYJ2430594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7c4ba103703b60acf9150f3a2a40074b7b36c686a8fde39e61f4d68c17d1a5. 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/CALVP2420858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8244af12363746d8f73f1431f49c16714748d089757cca267738ae440a294b90. 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/CALVP2489379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b829941fc6857927174c2719c29864343556f84e7b4c49c172241f7d59e5ba. 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/CALVP2419510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f4d66b0202b710eada28279cead706d292e6bc813c8490f3cb36cdc23678f2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLRD52354645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1377b8697bd24f22180edc1c7dcd308c00a547d85ba12937f4b03b85e66f97ff. 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/GX3Q92098346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb09f4fe5cb4f3fef399270b25ce160e0e37e4a0def4408e495fe74eda22739. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLRD52118961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c2cf5e292b972431b04235bb320975d386d372525b4d0cdccd47a30fa0d2e. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/SE6A92054375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0003ef4fdfd852d6c466213a41e9814801b4201ae5b295b7e0a0dc92d5a05. 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/QZWFF2490806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bb27091fe7c96cec86669393f55aeb71adb943510bffb2e50111a5fa800f2c. 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/ZACT32100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34370b78e40a1c43405b9eb6636f47b3ae160bb85d38840133cc03e863bc335c. 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/ZACT32100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681a612fb6844ce5db8a51a1b11bf1351bc4304004832295491368a947a70528. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ZACT32100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead2a5ab0392e4fe5db32dbf8ec8fbfc579082f064e6410bd89c7a185c06ee8. 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/ZACT32100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88e67bd2a11675bf0b80b46759e2db7e2f3c513406548bf5f541147182c8e2e. 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/ZACT32100031.