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 0xf06a3d1a79104b8f09261bb1263722a218bb566add5203676f42a31609d2eef7. 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/2751ccc2-029f-4b30-9536-9611138cf0d4.json and https://artists.proofprofile.net/proofs/artist/2751ccc2-029f-4b30-9536-9611138cf0d4.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 0xcf330dadc985c47d899bfea4d7d2b202d71195b29e1ec80431c7281c0d529131. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPVP01600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bccc06b43b4fb3ffdf37173597d534fefe8c2ab5926c2892040f0749e1f37e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPVP01600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa49e7f03125d1c70b255f886ee0d4e51c896257139b0946f80a3d8c96009bb0. 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/JPVP01607302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4533fdb4c21da3e9ebb1c4880f02f0a81f868a1d5f11c3d23e6ccfbabbfbac. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPVP01607301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3817c2f347fd87741e2ab6c7b54b20837d6f937ef6282738466378114226c. 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/JPVP01802101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f87f652aa78088cf8c1efdc4596a62e701c299065a3a53446b0f0e737b8fd. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPVP01708701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1401de5b894f6d9cd3ecb16c17e1443880cbfd99a03c6cdb4ee2b240dbd3598. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCJPU2378405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d37e6f0fd5f647482e0f590f43393549fb910eecf796010f83c28f36bb3a650. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPU2378409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8dabae6be98a81dcd79f9d2ef92380852ff9068d0fc28194ddc219dfb94c6d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCJPU2378421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6056ec389a141416357d788adfc8cde25a287f8d849b83bc300243a941f083fe. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCJPU2378429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d52cfae404216da2c40f69a464a6cad679c9b1c1ee3f54acf36b03b1008693. 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/TCJPY2361748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33446475e9047df221efa858f7a948392a31a9839d42fe207863bd6c69d6c45. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPN902402840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5b711d24ed949194ba686e0cdee8e9fe356df9059f0460b0a98da7d5b2c983. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPN902402850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21038f4d8f2ec6ae0e00caacf34f0e029ab9fd53effa8216adf9e27cadd1355. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/TCJPU2399772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aa4bf29d3e71459972b73eb89c2c3e18f159ad9ac45f916d277cda642e0eae. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPN902402860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd1a2567238b438d48432ead85f0eec9932bc332d8403aa46e9c9434cde262e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPN902402870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04da80177612cac908d0c1c8ccd5c4871739a1c216e57d1eea9bba2c75e98b67. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCJPT2268271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2a95dcca345ae54a3aabad7318690e056fcd0113905442ab2a5cffcea5fabd. 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/JPN902402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5e0a44a971bd6e81005ac0417cc6a75e5c3cc4f54e6388de5635b7b75a2a6c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCJPW2368339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a3e81366ce99c3d7acc3c73b2bd38c813efcf43244a5be3d57725e71f6ab5. 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/JPN902402900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba509efa43c069bb56b7a0d703a49c9fac1474f2bb91076a5931620b1609759. 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/JPN902402910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e0f9ea3f247c18687d17bf82ce47676c5e310ded8b303966a276f48078d6d2. 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/JPN902501740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799e1632d320ab2349e9938267e5e4240523426386ae3dc77d8d3c88348c4b4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/JPN902502980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbed3e8cb329eb8493acac6d5d65a326019264399326eb75a0f07f7494312aa. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPVP01607133.