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 0x6a23435547619456eca53e55b29d7acf04238cb499395d878150b7600bd0fff4. 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/8dd6e89d-e20f-416b-b408-8fde1bbc82c1.json and https://artists.proofprofile.net/proofs/artist/8dd6e89d-e20f-416b-b408-8fde1bbc82c1.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 0x8a62593a45067700b148f8b1ccfc48205f880699692251703fd50fc59d97f82c. 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/US7VG2079172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf112ad410ee7f276f6b0701ce8941ea3a85edc780bcecc7eb02ee87f42e25bd3. 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/US7VG2079177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25bb65557e1ea35e4bb0a0a5240015430e78a940a548c892cd55bf03e551d4f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:52:56Z), 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/US7VG2079171.
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 0xabbfef580889da238d4e990990522b1ab202048558bf1a5f9c1224518b4ca913. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US7VG2079170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a79b95ac0241c199ce9dac263206d1da26e1fccad70d09ac93bf0841cc8dd24. 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/ARC571501821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43115c49e99d060842627ac0e1b854dbe81307c3157f6ea355d27923b2300be. 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/ARC571501824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02316ee410a6229e38f427089487f74db4ac12c9aefe3e27fe791e4aafcac762. 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/ARC571501825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205db2ef359c8ea7e5723b1cfed5f2e8810f379c9357299ea60083f34c49c1fb. 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/ARC571501826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb8421340e8fbf5261816d56689215e306d3af8e20964d00742ba637b260eb. 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/ARC571501827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c99bcbadf9b8c0591abb07c45de5b9cb45c8822c83b18c860d4fa9a8b4408. 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/ARC571501828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c23ab3d35655ed7dcfa6bb62acdc27f7a582fa7adf6796c5ce5ce0d9c203b8. 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/ARC571501830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c68e2d5548663647e36dcc7066285d45dbcd6d45b944e09790180de5f9a7b4. 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/ARC571501833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388c7756fc5b866d2a7423ffd061289f46e3b1b6ef0a4185fab97ecdb88fdf7. 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/ARC571501822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfc7ec384bc5f48241dd7e220ba4339ab794751ff31ddef88de078008cd1c78. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ARC571501823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3bcc0afae73daac24c6b43746f821b3c2e4fbe27bebe2bc51e88665815c4a1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ARC571501831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fa36d6e719ec195fa32ac3abacdad6cbe737fd1f61b9d32382dfeaa2af6835. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ARC571501832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f03ac99faa86c6c4dee1c3397d677a9390cb0d3aba7e302d8676d5269bc5f. 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/QZ5AB1606872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab8b22cc39cae81988f5639334a2b92d79251c8ee9fcd232506bce8322ebaa9. 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/QZ5AB1606873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376a2dc02e4489c7bd7f8acce5cd3537f602678b5e245a59da9652f421e4f6c. 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/QZ5AB1606875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030e4b9a981893b5969f761d85223e00cd08c9521f786e8f2abc18813ab0b761. 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/QZ5AB1606881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d33bee0e890d6dd280fb2dce34cbfa024128cdd88991e4221bfd1c6f1ac7a. 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/QZ5AB1606882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be31707a6a7dfba05f8b370e8be7b330cb50d98950c0d5654fb04fed60179e5. 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/QZ5AB1606884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e631d746fcb262e054180ea7398d6d5431af8af9947ceb3e5526016fee3eb35. 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/QZ5AB1606885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571956060191cc5314de7c758abc72d7c72cacea1fc619e93bbd415f4e14758. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZ5AB1606871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8552dff6a23491a8dba1135fe248c662ab72eb7eb33dcb7423343ef4495d3bd7. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZ5AB1606874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50c6c4032bffdbe92abe80b9c674baaac0eb038a02b53279f7c08a71d2ae409. 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/QZ5AB1606876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8914ae0ded25dbd32436937846bf4d13ff02ab2372de9252184c22f074a49. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZ5AB1606877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3813a07635939ea74e33d279e492b6bd58d6469a4d63b74a31b22501bbf871f. 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/QZ5AB1606878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6908fd348bcc00a762e667527ae4803f3ecb22800e3ddc85fcb2333fa9451a17. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZ5AB1606879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a8441e051a56b1885e0bad1c4a44506843190c1371245bb9e7168094cdc03f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ5AB1606880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d405a08626e006d6e929b0062620ca5c1975d1dee59341676ce9a5bcb5715a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ5AB1606883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8006e8a89b19d08024ca50c7119ac7e4217485951ba54b599e52a769daee50. 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/QZNJY2332942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6276551205a5fd89e556601e0f6b38feae669781065028d32477ebcdf819afb. 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/QZTPX2123762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509b2829b456ae5955d5c5e5398ab39d6297418272071ca9ca5a66d57967017e. 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/ARC571701570.