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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca7d1df85887a2466d8efca635d15cd539b44ffd043c6c6932a0326a2f63b6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9eecd74c-98eb-47d9-b9f3-59cc928302df.json and https://artists.proofprofile.net/proofs/artist/9eecd74c-98eb-47d9-b9f3-59cc928302df.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f750d0bd9f615b8d7ab2f2842859d90be9f06947e1fc7ed2a64647382227906. 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/NOJIV2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5471609d3f14a9c51200ac61f4a62608db8435a9e7963f24e8525279f2cf556b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NO2DY2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb15a0d85d07daaea5e4b76fc64ca09ce42e3d2e120b814bcf83ceb0754657d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6N2496981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aa862336d6805435fe8c8fbf9fbcd163716d97a77c51ba28bd665b6f299fb3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN92450597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a1bf474c022ed9f111fc2fb0aed23d989fce4745c911276fc4f0b16dda4c2. 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/NO2DY2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed3ddcf493f64364c837c529a4c02f90ed26e70cc491424569e930afb1fc64a. 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/QZNWU2205134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377ec44f4e6a2a404b138170dad8a781b9b3e473ebec92e5e16c96c32ba0c14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NO2DY2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73cc0d3e0e5697ad2d55ab62c2c5b2201cdd6f2d983f2ead1fff30d0e603785. 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/QZTAW2205033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d70b7706f139e319a77bd9f6bb741de6adda2cc811ae4a073eafeb6751516. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52231009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b391465b64e61ae324a755eefe77cf83ec2a428557b1780bec4061ab7470eb3. 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/QZTB82408678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8506ace053c663597727d5fb8cb06ea8e768e88c6330501dc7e6ebce31d916e. 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/QM6MZ2443706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c26b19e6440c0ef5a82280acac31fd6bef24f3f86beaedcf7fbb794c890e1f. 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/QZNWS2448204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bd4d93407bc04e670b6d6c71436a981b1817771bb1d57d452acfc8d8c96757. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2DY2300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36032fe2f0397d104706307dd48cea06f37a3b78f83399a5f6e6386884c35663. 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/NO2DY2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb746da242a34edac164a007a18fb95a2fb3331500a78fd7df37717c939a547d9. 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/USA2P2413002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f578e3236eca22870e4aa540249146b6d57d17cb240a37d3ba6a5ac69d20d8d. 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/USA2P2469715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f73cae0e0525e8deb3af06d3453fe6e98492b11d236ee6c7ba4d0377457d3d. 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/NOCKK2412010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02602d389ac1f81c31a54b5c8bf5410c13fb0fd6faa7995f5b8b1e8f385de292. 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/QMBZ92422132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a27332dccc4d73842cd5882558fc0cbaf0ed8c9c30db96b3d2058b6c8946198. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPLS2404735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650243bbf86b54da1cd01c31bacb2877208a114cbc4e91880aa5a57e829aab91. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42428948.