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 0xc4c19aa4d2ea0c5d26179bcb5873a2dda2536f95884a1f2e5a96b435b061531d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a7dbd4b-3f95-48ff-9bba-481b1da2c52c.json and https://artists.proofprofile.net/proofs/artist/7a7dbd4b-3f95-48ff-9bba-481b1da2c52c.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 0xf4e74c300f43ae3793a9947961b1d4af35acacfac509cf65235e932b7797c1a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSKH0800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c26209af298bd7169689f8b9caed1fe1898a4ff7d1a88ca7f8b4f5aba83a1af. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USSKH0800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6583ab520964cb32d6b7791068d3a47622ec870807c467244646b1fd079d9306. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSKH0800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f9c9c079eddcbc0e2ca66c6a48a152897ff22f75b14ceb7dc4a8b5845b123. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSKH0800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec1414c4cfe5f9404970f412ebf35a0ffe1b955b73f3ffa3ce2cb1c25c2875d. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/USSM18100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea3d0620210854b04d0b244b015abf09716894ef090b884e665272de30f8c7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USSM18100740.
The Lights, The Sound, The Rhythm, The Noise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d7a55ae2c0892901f71352cb412b3e0edfead2d05bfe22da569727d9d9b52. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USSKH0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a2eeed9d3f11271ce8c19e99666b4e6b3f13d2d645c288b55ceb1f2f121789. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USSKH0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854590bde24bc4de478beb38d7c24ddf5f97cd649f1231c9c33e7ae3e29c6853. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USSKH0800015.
Public Flipper Limited (Live 1980 - 1985)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715dd72f486a288ddd8d6fa8a26b5464060f40a05376af98b6da95dd052a9ce7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:04Z), 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/USSM19200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54986caaf0a09a8946ec52e46a26b2d2f29af4800a5d16a7ad5c81a95a961cba. 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/US9HX1000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5fce4997dbfed7ffd39705cc7f42288acaee83eec3431005c49c79fe16f71f. 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/USA560692994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd002d1eceb5fead98468aebac67a8045b667884c1752c0055767304060daa328. 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/USA560672249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefb362a62368aa255196b2cfdfaf23bcff19e1c3d50dac54ac661335fe64cf1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US2B20401432.
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 0xbc34386820797078170cd52f40034f657f2980bb6123cd11f839450b8be1751e. 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/US9HX1000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a4a242ae5b9da9e199d667322fa4662e62692b41a1b0b174a1bd4a64a1c03a. 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/USA560692984.