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 0xac1cbde2d737e86d2a850051769990706182878438d4c407031c6bc88841b62b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68ceb3cc-8a5e-4eca-99b0-65f49aea851f.json and https://artists.proofprofile.net/proofs/artist/68ceb3cc-8a5e-4eca-99b0-65f49aea851f.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 0x61427194e6c70c75310484828932eaf4dfe0ec8e66796d5ec7041fdac265a40d. 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/QMANG2234933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425d98ed6b01fcfb9e6bcf169fa79aae2675a639f54512c7596454637084d031. 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/QMANG2234943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a2f8454ade09f25965a58b00004ed022e461b84c2a9fe9f242b1f6b5b0ea92. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMANG2225656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4527a4df02676ce340f3db5ed535bd75720c58da79143e21ae3e515fd494a6b4. 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/QMANG2234945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073e505a867896cfc3210c1477dcfff8d932a2884436a73f54ad2cf118667e12. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMANG2234950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571631eb390267d852d76af05923bfc032ae21e05d624074e7f398228c59e723. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM3DF2253711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62715e193257e23b33fe252d196936eae477569ec85b4559a57b1c867bba9289. 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/QMANG2234959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0812d86a2c0349e2db6d0fa4607103f078128f54bd632b6597eda9696504c86a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMANG2234961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952c6cbc584d8fc48ac7d83eb950ac652c1d6fe347afe756773d188e2b2afb3f. 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/FR9Z62100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0930f818305ef8c9dc171f1982115505ba3cd20d18ed44899bfdf477ad3dd0a. 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/FR9Z62100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1fb3dc246a700c739bc4d417247eae23665a1a629eb793776392d4288a4cd0. 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/FR9Z62100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaf6cb8ba40f589175fd3f8d26f745cfe9a9fff66745f2391a664862fe3a91. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZFZ22341686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e84fb4a495d4fec254a8493f8e9b4b29669d74618ee1479c423b0792ed313eb. 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/US3DF2485522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8ba25d94e943131bf2cd445ab76e9acc31bc920026d273b38a7dd01a2d4b2d. 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/US3DF2485523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332803eaf261c4be9cd28898c67c52e99baf4a57b433ae54505b42cf063e5a62. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US3DF2485524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01754ff0789fed68f48d7b532ac48a0107eea909f3d86ec881f02886536643bb. 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/US3DF2485525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a89a45399eae6b9e79b73986d53a13f65e46b8e7637645edc6caf27fdca68f6. 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/US3DF2485526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a594f02279689852e90e685fd5c0c906b964d7f1d4ab39cf4a89a264d3a879c. 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/US3DF2485527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bc51df8d3f282ae010264f505d2c8388e9249a163d308cb486ff950d607801. 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/US3DF2485528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7b34e918a090de76312211886e8d1108d8ad0d40446e8774d2b1e891fa396. 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/US3DF2485529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406a68e78f9324855a752495ed2add996e98569970ec4fe19bbb9070976d060. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US3DF2485530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3016e1b96519552cbb3b068a01fa2bc7821f56c2589d557fc7885c020be664. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US3DF2485531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a649633b22a740a35ab0d81781f37eeb4426f9e9d44ffc301594250e842bc87. 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/US3DF2485532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6616818087e8dc0cfd428ee8905d598a5dadbd1bf02a6854dbc709daa50dfd. 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/US3DF2485533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa244bf214c5e709d8a36391c2eb14e5caa9ba73835290235b6768cefd52b6. 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/US3DF2485534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc7e608e74393db347a252ac78d9e24fcecfd0b608122820c715207a03f67d. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/US3DF2485535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700d8ca61693e9017b5fbae4af021aa508bb6d69c346cc2d5d7ffe3bd0b78787. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/US3DF2485536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0095dda85e92484fb62223d6a29e55aa0450476c47937d7e53b93888c4a1ec9. 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/US3DF2485537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e41c77da016bcf8df2e8db1fb9f239f408a823f6894a7afbb827d02f97ff778. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US3DF2485538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4054dcc60374c7cd60d7b97ba3ae2411ca68db163837d8a628b8878f4c2cd45. 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/US3DF2485539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da876d4632f2d37838ce2ef8663e89c93c22b46b4f23580b63f1572eb20bedb. 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/US3DF2485540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d7e5bbb6f9f1ce06a2296f52f58f1e91e0ba2f64eefa63f8aaf65bb2f709a9. 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/US3DF2485541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb37769548f379d7b410259ebf16d7721a7d6cd5c2499da5d595c44a9ebe0d73. 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/USANG2296554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07d8bcdb018f78fc5427397c3486d5e764bf5c491e2e396daaa94489eac3abe. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USANG2296559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc26cd0c6b8ce66ce00851d4f61f22371fc3f5c9f809318dd865a9ab0a72c4c. 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/USANG2296565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c713a01f1a37595f30b9a53c72fbb0af2eaa75f03de79f3e746915055b84d8. 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/USANG2296567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b493a956a4d37bd64ced90af51ce985d9b55d7393785a58364f5be2f502cd. 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/USANG2296570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf49b5961a3d16f4d81fd95a99afde8895978395e7e76c134090ccf2b8ad78. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USANG2296572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cce1d77535f0b2cda9bb9b224fa4d7f6453dea67f9c6439e3bb88dcacd42cc. 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/USANG2296575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb524e0b1ba8026b07e6ddaf15daa5f448fef775dc67da51d4e1005fdc3f994. 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/USANG2296576.