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 0x31215a745a437c79c6ed6394b9892cf42022a5460fee94513c5acfbbbab7e696. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ed84996-09bd-4547-a626-66e4ed160b7a.json and https://artists.proofprofile.net/proofs/artist/0ed84996-09bd-4547-a626-66e4ed160b7a.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 0x0268b7384cae1b65898e0fcf721a5fbeb324b0ec29808bc275bd17ab16585f0b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEZN82486393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eacc214f2426c44a6e39ebf3fabacc884b41be35482298918f790b368f80f7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEZN82486398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a51af310d518310cbdbdf9cd4d3ff4b1d270801a0bcdc8346a006cbe395bfac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZN82486327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b85db6aa618c177b995af65c5d210f25540c9f57059c58e61ccc287437ea5bb. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DEZN82486334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533bca6b1351c3fa353a3e0bda1bf54a59b05acbcabad0e7f71e60a73dab46e9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEZN82486336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef8365811cbb9adba64ebbf369cc2f0287eed501ac92e2edc1bc47a5d0d8063. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEZN82486326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110b6a023824ed7b7fce2f96056052af27b16fb51428f3d9a08a4b2fbbdbf44. 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/DEZN82486329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3682cabfecce648ea9db1b3161045bc8340f99fff7d6521e4c99b29dcfd90410. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEZN82486341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a7d80585eccfff56d98fde63a61ecdb8fb5459f0d43e459d7a5bbfb76c3740. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEZN82486394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efa5274f5fd1d59967cbe7df727855d8326c30b403dd8ba8ee56727d8a3fad5. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DEZN82533649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a5330a3bfe8ca19d11360d6716daa74483bde13b25ff7011221309e04870e9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZN82535365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b06db25c8be516f5062865839d4ba403e527578e6cc26544f4c457a83d2e858. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEZN82533725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d260c45dca9295a7433afd0fddd82fbf53238d5beb9603dd534bab5758481b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEZN82533744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab1de30f572ee2d2dd66ccf2d4c3011e1eefb20b8afe257d75d09a87549a644. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZN82533598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1d9730765a34a47ab327ebd60d2df37db63e0f69a6cfcf6f9c45cf91d4e78c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZN82533600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d59675c164d96eba8cdb58dc206a9f6fc73e130a4a964d4dddee19b5c9f1d2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEZN82533700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4c37052a1bea550896c3814f9a06231f0a80d129bc5404feb51873c601e8b6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEZN82533698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53082f1270c8a9be1daf02e6d94f47b87fd55a1bd1ac3ccfab536f9eb3688e01. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEZN82533566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7e5b654fbd69f56e7bfc5bf14de797e7af32bb406c0ef6c8a61b255653d201. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZN82533730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08692f0c4af03c2258ff70bc5ab00a8585948393f060a0a7ec7ab578269271d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZN82533717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf695d8693de0050cbde002814c47922e4e0824224e93881e19075c4e4ab7589. 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/DEZN82535226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa011a2148c370f676cc20341cf7e077835bffa567f6c8a1e98fb73fe180dc209. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/DEZN82533623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61fff29a4dbbd8affe33dffe5cf5143f378b756ecc8f6f8414ba1050c1566a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZN82533596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25747c892de2912adf6a56e97e5acc011584d419bd7fc853219f3206ba95b29. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZN82533660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf3081d4de39ec4b442a9e71088bafa5e866801e73577bbb06207d889eb000. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEZN82533651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea05ca8e7d5154f026290488188aebed8247cf75383b34ddad156eaf481f42a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZN82533767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c0f01964bdf1ced1c0dcb25cf93cd2bba2deaa9a831ecfc2595e5217badb67. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZN82533751.