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 0xfc20fd573deaa5c1799c5705adb8f5d1426320acebdb6ec59f624be1b7c1a067. 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/012e2a17-036d-44dd-ba15-6f0c0a00c1bf.json and https://artists.proofprofile.net/proofs/artist/012e2a17-036d-44dd-ba15-6f0c0a00c1bf.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 0xa48894f726722802a73f8d8ec1940fa9cb33cdbe431153fbf015920f18c7dea2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNJX2500383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f165484bb9e9838b82e9276a79280e4707476775d98c15abd6b820f104fc2c5. 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/QZNJX2500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9908b6545e26274d816495e573641776acda7357cef0d6ba607983e7540e3b67. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:34Z), 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/QZNJX2513275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600d2c588ffd31db526f99f4592b6cc14a5d3a00e3d11623a3fc3a6ba95f084. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:22Z), 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/QZNJX2500396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d53c3506e5279a0a7abff474f15f09365a70031e89f97668842e2608c3fd2b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJX2500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e5c9d59a191a55b83d886787f75d11095c7f0cea3b53f1ef1b243c842c794d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:16Z), 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/QZNJX2500376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9399886d51eeee6e2ea0332779b10ee393592bd244e4f37ea606d32002c919bd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJX2500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c594d0256b429edb9db9c39fe12f7c59cebae1ec158787ac4ab96cde3ada51f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:57Z), 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/QZNJX2500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c732a3b19e041ddbe373eceb6aa9b9aa9879cf5124f5b89db5c3a3123e060dc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:28:44Z), 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/QZNJX2500337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec017ba606cb57b40c49f2658ae3fac7c8fcbba36d5d51416b5a9b57f93713bc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNJX2500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74494ffe601bc015ce0c358a17c31bbaec5991ac1279287310425fe71bb07f. 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/QZNJX2500312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6293bfc0123d8fd81e7f77a5d3dc433b35a32157ce4c8d5fe3d5a34ff99cba1. 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/QZNJX2500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c476a9e341980a36f370c2d8527746d520bc72dd283e26b788589e05660eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:02Z), 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/QZNJX2500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb2b35f8d54c69709d9ae0510930ba1abe3e33a19c35f8ae32ec1262ade0e62. 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/QZNJX2500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93521313a4f70afda1dfec654e5c9f1e031319c55a663b8c0c177c3bbb8653d0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJX2513271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0d9a631765cf44cfe14fbbe620d833282c12d751b9adbfa553e0f8f01d9145. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJX2500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1698e2bf71780fc4d716ccf0a23d36f06ef8b9d6ca2dbaca3c400d03442a59f0. 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/QZNJX2500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c4de9a46e5d074fe5828952857d643da34dacaa3f55b19ec01381c35b5a44. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:33Z), 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/QZNJX2500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3e4a03a3e0b550f6480f0f4c1f50ea1fddd723c22a8cfd6c0e9b29c47541f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJX2500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0225d2157d7a9bbba13e7293150765e5c182ec8a7fcb0fbd8ebc52602c5d53a9. 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/QZNJX2500327.