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 0x04ec200866e1ee654e59cf1602f99b1c503ea0ca91d32691be9a7257759af450. 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/6586ff09-4950-4547-8128-133d13c25cf5.json and https://artists.proofprofile.net/proofs/artist/6586ff09-4950-4547-8128-133d13c25cf5.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 0xbcbb9af6833c4b0d1747bda811ecc75e0c2e405781e04f8f03c204a176a9ff1d. 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/QZK6L2089563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d544291cd571f39a58cf97857b48eb473a2a486fe5d76aaf33f63ce44d563c. 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/QZK6L2089564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa82cb7a9bdea64ceff87909c5b9a2249b86801a6246ff66acd9d4d9dc9308d5. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZMEN2084408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1699a9bcfa23938968da780fad03aeb85ef228a58c6d49e9c2383a49a23265fb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWY2027843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9afedc13273abe0579b5bc64180e63815880078788d547ed975eb63fe99239. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFYX2125814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c23eee3e2ac5a3a51f633c496542b57df92a7153abbab545b18002d03c37fe. 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/QZHN72152250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513a57e08e32e89d76ec779c56cdac327d082f8cdfe34fbf11f9c9a985951d2. 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/QZK6M2180655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d1d02fc82a5d99a0130e59fa5c01ed48f2fbefb45a471a558b172f149e513. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZMEM2170691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c31cf9d0745ca06dc47fd6c722174a09e1d4a407c4a57d976c5db8784d9e01. 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/QZNWY2152695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3265e7719593d0370c78a75875c1776d033e3ef5fb09758632dd68a6b16df8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA82237552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9413a05d1795fdee0e8274550d4205bb27f0061e8f0d94172fae44b29015cb9b. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DE1CZ2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4629d00df63df709106bfec05d26a66416283199195f67f084409325d5332e. 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/QZHN42352271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff77039737fce7e4e072b460f7b7364407450e0ad57d75016490c964a7db9e18. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTBF2465605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e160ed2812ed5f55c26a05155386abeb12fc10fb0474ca84d1624a36d81fd. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QT3EY2476463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8672d72e6566a0ddbd73996d807f833b867c34b8809399bfa4fc9edb6183e09. 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/QZNWX2121731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5247d8917dbd411040b6774404df0910e1322cc9fe14c37ba9115d005d786ec6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZFZ42339658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37f8116e70cd62525eb475816a4e6641423561a94147006bb086eb7c05eaaf1. 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/TCAJF2533885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e53091e41cd16432df341caef9ef7cf3a90bf549c169d8c61a534d89db9ca1. 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/QZZ7Q2543473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd1e3f60476f6e2a1a57f78e1d6215e74c7c88e1c8c5168f5efe17c576b3c90. 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/QT3F42505495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa557d9bf85e4a0e0b1d51c5dba8cb0f6e49f39abb45b2fb6d04f685f9a835b83. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR0012100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0f1317e1c5a92e30e71bad0763b64d5b95393281038583a234542e1bbadefb. 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/QZWFJ2346108.