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 0x2054def0b1dc87bd1d0325988fe25c2aa69d3e6d36894132534683e38023d524. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aed599e4-df6b-4c3f-aa8d-93958cdf7d5b.json and https://artists.proofprofile.net/proofs/artist/aed599e4-df6b-4c3f-aa8d-93958cdf7d5b.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 0x81f15b818007084b55ee0695c74b44bbca45f998535dbb6c3aab45d9442d3f2d. 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/UKZGC2305245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675f4bae3d6a683d0d41c130ee42be42901feac9389bc421d89d0d8f5201f3ac. 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/QZTB92201576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594bc2691f76f47cd49af439a05b30ced222d717133b2097a18404ca7835ad79. 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/QZHNA2243428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6dd9c036a11604df2bbe5af69753c717f8997571e99e492f774af5b33222a5. 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/QZK6Q2291654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa238819a6ac2fab1b76788119fb2f8d5026ab8c08c9a6087aaa1c2dd22e97f55. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDA52154911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22015d91f6caa00fbcca63938d39cab5c62e9fbef2d4cc1d91cc3bf28400856c. 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/QZDA52154914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da4ad2a8db8876c637bd8180b74359fbc761a16dade6bdb774121d480cba2e7. 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/QZDA42162459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7b48b49ed19b9f856f68ab187b8a6c33191dc687928a47c49a381d7ff04fe. 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/QZDA52154916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a528e2721a6788c292564237e9e4098ef670877b84c07e2ece08454cd95bc3a. 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/QZDA52109170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb0538ba49f9993cf06c5448ad9853b65a289c56687b68e1d656ef7a5c9209. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA52154917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e42987013e8e5de67d973f1bc0cde84bd68fdbeaaf812a68bbe927900b353. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA52154918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc52312212c46e47de433c86f195bd0968a40682804f97381cb1743ffa1654. 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/QZDA52154919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4931ab006712feff24771ba363ddb5ce1f74aa35239ab09bffcb9ba85b65a7. 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/QZDA42198095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f407e2c02c073d95b1985e8f7ae5cb1a4c3914a37c01607755f20db9bb4ad4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN32089494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e9abbc702913bc3f51abd10b7a1cbfa03f07e80c4bcc92ecf4ae205e12993. 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/QZFYY2025403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7242d1c981a64631cb3fc6c0e56bd542f637bfdd642d51eaee09c9f909d72dbf. 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/QZFZ32094257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c2da97a9938306a4132fee47a1af61b202fe5d90adb4a5d7210103e7167ce3. 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/QZHN32089495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603e7e69b9303e6ebd8e987f563f70f4d2f52c898dd8286fb52b79b79f808f25. 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/QZHN32089496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358db163e6908fbe1893fe433e3eaffd99fb5011f58c924034dd2a1a1dcb3b1. 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/QZHN32089498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73be60d6060acdd355f21bbf31bfa23da131904187d3f0f357cd75decaff085. 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/QZHN32089499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dcffa4aa0e0c03cba6d68e26714e6e5b61916fde7fed3691d547d94b039c7b. 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/USA2P2504822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78972092cb7f925b6d1f610f4ed6ec1532f90fa67df5b9f81995c20e46af14af. 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/USA2P2416142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d92b9319eec9f002bccfd96591dddbe6703247cd567bb9120fd905e31c8305. 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/QZTB52386776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e7c5e2ded64c3b6adac9488f0163eee4f433601a59c67d5b7a83c30aa6a6a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USL4Q2050917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e02c5e8f30a25547d71ab6c97166b1c5e001577f2e164b29515a62d35c0c6d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM92047425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7242d1c981a64631cb3fc6c0e56bd542f637bfdd642d51eaee09c9f909d72dbf. 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/QZFZ32094257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6f33ed8038a5020e01da6785c7691ce22e6576220576a5a622d66c7d28586a. 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/USA2P2429639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb21e6bbdfadf91a46842d24ddbfa0a9908f6e0a92012136fe39fe7d1e0488. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA2P2429640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997d3ba95ec797dab57d7137210071ab0322ed98d39563af8de1228561c64543. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USA2P2429642.