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 0x7b140a35e40641225afe78695ed553b034432f5682c3838823727bb8e2ac0cd0. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d634c0f-a03c-40fb-b98d-9758a0ffcbcf.json and https://artists.proofprofile.net/proofs/artist/1d634c0f-a03c-40fb-b98d-9758a0ffcbcf.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 0xbb3fb240f7ebc9e99aba44ebc6c0b6dc560789c868137cc6fb0d13c7eeb7749e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM92253019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3768b575eb7c787cf0d4653d904540c8118507e819e3f38f5bf99e8ecd3ea96f. 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/USHM92253021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9173c0b0db8d3c72f9bf6fc558436b9d007c0b48b04523b91b732965bae6b9. 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/USHM92253023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af8f0e3d9f1779c547adeda0b7d5a8287b8f55be20753f63434697978fcd056. 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/USHM92253024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdcae5b98052b146e5240825a7aa7214a7391d74ee204c92b031088da139f77. 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/USHM92253026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4345c727097f31a5588958e91e22ea2ac43272a94d9cb855ab92e4d6314323ca. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USHM92253018.
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 0x19560dcca15cc548baf94d8f47f6177ae119e654507e88347224f8b6a6789acd. 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/USHM92253020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f3d3c0461e99be6425216c408c671bc68e34525ea6fc05a09be6c3021434d. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USHM92253022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb613c49ec338818d24ef03f468fed56f215bf098b0fccae0520ee252b48af27. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USHM92253025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c692b2a3e519a99be6cae1f52cbce8da27b6253dd321199128e3f9f70374ea6. 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/USCGH0972927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ee6b56d21fe0de386eab5175ca0f203f6b155b6a08f11201b754aba40f3d4. 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/USCGH0972928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a3a4b2f515384123273dd2d0cca327b18c9e07f6d3a7349ee3c2488eb77eb3. 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/USCGH0972929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183df4948b36a01ad5de43372352d74ffc8c8f57fb527fe72fb1d20bc3442f62. 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/USCGH0972930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff88910c8b482194a0ce270889a93fe930e5ec65627e451e76be4000a8423b. 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/USCGH0972932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbdb6add1d4d12012f42c90a4b8d9db0d89035ef4b84959c989176dcaf9898. 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/USCGH0972934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7af44794c3240bc068960f9526f49e6942e808c1f591bb61ed2c0e6c46ab391. 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/USCGH0972936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e18e42f4e04ebae43cef2ec9abc9d5c634c8e59e68f8bf814b204898ad268. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USCGH0972926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce672ab70ac487f3b7ab5cb5c4b6b85a7d202f65bbfc193e736f73de92381f6. 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/USCGH0972931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf412d89da2ec589e72c735b8c91067b9fdd0f7befe4d657f8d2165add0a26d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USCGH0972933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af564a704078ff451ccd269cb5ea417f8dfd879d16534b9fee1ccd08f55da00. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGH0972935.