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 0xe1ade99362e1b5ef6ec2f2402d7fd192de03f2c7b0946018675b4929eeec1bbf. 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/726a268d-9cc7-4471-9537-bf53369851e5.json and https://artists.proofprofile.net/proofs/artist/726a268d-9cc7-4471-9537-bf53369851e5.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 0x9a430c2acb24481dd22f557d6573dfc58f98f378e286aebe43d41545f078d245. 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/RUA1D2489004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc45a58158b21673f2540f67fe551a0f3ce6b211a8caec83d66984f8c989063. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RUAGT2415574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11630484e5ed7d65ae260b97a12c553db5e6855c7db2561dbcf69eef726b03b5. 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/RUAGT2415575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7032145eb52e741e565e6e1dc727264e6fd24cd24c446375c1f626452b4b354. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2419656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebba1badab334d2501e8865420776dbcca5279bda28526d56e71e463e69f890. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0M2423989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5b1bf40a7b4f3732b14243e51817e8a65a104fa40325278a8c7388669419f4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DGA0M2423990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef442e9a902325e14a65a6a570eeeb863f6120eadba65a32b1923fc38b05da8. 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/DGA0M2496782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08239fdad3463f107760ab4ed0930b882cae613d2e765d1f149de620e02b8cc5. 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/DGA0P2402837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747c9b13cc03d15eb04d1f25d101478e8d7316aa6caa740ad4263a38a2858de. 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/DGA0P2478542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6405bb1e94def0c9161e4dc34a61a564cc7e17b05350385f3af3280e889aafa4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0Q2486041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5286c2102caaa51458a217a7fb3e2dea6236ac13e2beba5beb61085a8d1c76. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA0Q2486042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db04cb619bc8fef0e6e18816b210c10e498cd92bd0e1f287e8e9eee5769ac69. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0R2415968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db7a77530c520d0cd6b6a781650c30ae9b52b3dbce5c978fe23be366ec77fa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0S2436664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9747f672644b5a0f2b970686430f559830d51ccaa5a786d25bb59ebe66fbf71. 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/DGA0S2436665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be027cabca85d80ad7cd36798014f7660e3ce44308f27a2d5d7c74883e0679. 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/DGA0S2436666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce339c40864e82e551887d97382d36624a08d0becc0b8f6836cc9ddbd438b497. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GB8KE2426367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda334f429fa76e2b964aea57b9df031653b091dfcd939f68097e5bafbb9f7101. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GB8KE2427662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e242f76d59087164195f9ebb798cbb75edc34cb90f64023a9fa9ff606d3e8f. 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/DGA0T2421064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b10b7ff618b919e8589daef6a20c1fa7b5d0fcdfb8c6159194646c6c82bdf2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DGA0T2454785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75bbf909e8e5fad5f17f1b8cd4f00fad03ae1b42f37652fb5a87bc0f2187f7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DGA0T2454787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11059b175e0f2cad7781f6b9c5e154f44770956fbb27705b792591772ba362e2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR10S2508346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2832c6f0c06d47da9cde081f8bc8b28df3280c8133798aec22da39e95092a502. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR10S2508349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1aabb7cc3642fe061d03d30cadb74f60d36b40f734bcb47fc01bfe5d1bb5ca. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FR10S2592028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368b40ced935beaaf45899c44604248998e1eaf19771f6f52afa87d644566a20. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR2X42535820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582400cac24dc076041a3e96652a07f85269590ffd628710ba24668d3cb4e05f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB8KE2506040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef4bf3a6e922f7cb8ac3140b6d9eedad8a4ea9c23c2826fbcdfc33744f8a232. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GB8KE2507973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9d274527b07ad4b99f7e5f30f75355a54855c96c64aee345cb6bc6e012482. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/FRX762592429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae129c0ebd11710d62deee4ece6dae2c93a0c0b165a1ff251e2187ce6102a5e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DGA052514747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9001c706322ce035a7cc0fc943e68d93bd063d267c5f85c71d8a68dd8ba76eb. 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/DGA052588948.