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 0x6a8e8befc5ee85c58504361458ee4d1d5e980108d74f6d85943664078d5c9021. 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/2d0deba1-81bd-4238-8427-7c567a93eee0.json and https://artists.proofprofile.net/proofs/artist/2d0deba1-81bd-4238-8427-7c567a93eee0.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 0x04a9ad4af2ab90da40b97ece51e86a765e0b589ffcd7780de5dbf88811e321fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ7R42354207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b773d310e5841cf6aa44d7973eeb07209b824c34662f1feae58556a0c6fed. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:43Z), 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/QZJDW2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009a229baced3a3ad3669d74f61e4d756b8fceb02b736e8b839dba5346bedbd8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZJDW2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e4fdf7b71e80c493a6893dd02f6ba6f682c8036dcbc87b3eedf285dd084761. 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/USA2P2440596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322c161e16a8a73f201d253c47271fa49479c1a6b27953d2e92c3632f6fdc0b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eeac95795047ff7250e9acd56959ffa4dd09de1edf06323100d8aa8e6330b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268765029ed87614a84a1f11261d486f4cfe24d04d9aed4c3b03ff4aa1c1bc34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa321de8d0904e7352c9e361e3e0ef905b7d3109ee7b5b22920175eb4c68f2bd9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf71995ac88220c861b9237feea12bf9217626953ff86ad65792b4c25f9aba9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df7660cfc3d9f1eed71583c608b6b1f2758e9b762e21838b75ce0f516215eab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2475400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d234519625a2e93a7fed96664e2dfe8ba9ab960e82d68b570883e8a63461e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2475401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aef3dfc58c906ce9b91785262d512c7f8115c6cf344cd698b80792d2faff98. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2448814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5422c3398d1eba2263523bcb933bc3860ff8a051a138c15dd34445460f71b92. 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/USA2P2448816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e35911cd03c6ce769087f167211524aeb5fff335344153b1a740583b5488828. 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/USA2P2448817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaf93009dc6ebfa9b84996576f58454664798e6a32639ae0f932065dc1bbf37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2514871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3100bfde018c88282feb4d0c1613d128dfdbc211ddbb6722541f40f3e283a0aa. 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/QZTLA2575978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb676e804cac9d348f36237a71b31b654f956784deac37fd435eadeec9ce3c3cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2509131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745f4d3ea95ab35b5ed625fa4689b4d117dec14b244f5c601af77b87cc0b4cf6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2472025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc13cf919ab5115f349a86fb07e614c77793086744494841bb350cb3eaa06b0. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USA2P2412934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781cea36963219d5e02b1d9555dad8a46bb92c99436e8d99e305546cb0e387e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2412936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d76337d4583658575c040a021e4be66128221a4197d7a982741af697d4934. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2412937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53917b4337a08d576eacd8199d177a6d04033d3beddce71c595c3de483c9f26a. 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/USA2P2408434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc13cf919ab5115f349a86fb07e614c77793086744494841bb350cb3eaa06b0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2412934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53917b4337a08d576eacd8199d177a6d04033d3beddce71c595c3de483c9f26a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2408434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81abea9986a4960e32837b50dc721272cb0809b663c2c71120aeb3af5dd322c3. 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/QZJDW2200066.