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 0x7e2b6bde3625c8a33234ad89e063818f3799f894458060c80f7853d2a6e5155f. 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/e9bba122-aae3-4647-b4c2-3e224129eb5c.json and https://artists.proofprofile.net/proofs/artist/e9bba122-aae3-4647-b4c2-3e224129eb5c.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 0x6719d26f1c5fea58e5a720c0283aed32738fcb1fad4f5ab12649c16369c53939. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFF2382897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce99d901379f5c2632464b756d41d2d1ad19ccbf0b992d1c25e023768bc679a. 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/QZWFF2382898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b63f2ce30dfb7f04387f0d5573cbdd336e97ff5c4715e2315ce140ee5ea499. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFF2382899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0e6cbf0e722da4f435106de574f72b6370c7710badea1a8870a2ae183d1476. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZWFF2382900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f706a44a842864084ad0e14425b503b5ef5e7e3884b60268b9bbe17b927e1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFF2382902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b80d8301b5e5680bebde526cd581cf28095b795561173eb4fa18e42d09484. 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/QZWFF2382903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc36b7731f5c57aab490a78b5ed875e0a03eb546374e80aef88d150101a4a2aa. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZWFF2382904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279ba4bd0f98bed08f388feb29a9b72422a3ee1fc2a3544a220ef2816f4bf22. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFF2382905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdb3f608c01f2d6a337e328e8bf705e2a295e76e381dee3a005c374f5285cba. 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/QZWFF2382907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766af9412c686acdec51f0038fb812c4ce4c4960d9fb2440533dff5c6106297f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFF2382908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7d8217141f73fe4d4c5e23379034d54c3156a3ffac953b8af8651ac3adf8cb. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZWFF2382909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0481104df064fea91fa9aa85369d700272361cf66479e42a80c1071f2d59e4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFF2382911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d75c0418bada7c8190be801688e69bb84c23e3fce58759e64f20efa08381e6c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFF2382912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38748c01b2482340e202d143c34d180891031c7d30843fb9bea7386ca4c3e4b0. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZWFF2382913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c78b9b7cc4af8288771ca7566271942129c6faacf43f7b1cee264f184fe910. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZWFF2382914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ee2f1d7feddf310a0096f8a753e0506e4e2ac7ab2d04caf259960c8eeb5e1b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFF2382915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf2c9d57c177235acc9e1f2cdab4783a07ceeed5ff8971f66b38b2c6ba0c3fb. 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/QZWFF2382916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c61c962877e372bf7837cc4d4f281d442bb8813d13c3559010370878232bd05. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFF2382917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d6b04d078e9df3a69f204d3109cfbed3ee6c2889b5eb2adec655423235b99c. 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/QZWFF2382918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635dd0a6cd9e683c30d3035f4e5f5a3621044f733cf30fe4a71eab1f824b1822. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZWFF2382919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36ba7c409beb961fc8d9e3859aee022dc281f69e8a9e7d508a1830b49330874. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZWFF2382920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9c5d26525ebad6334b76db21a3cc585d739fc43b4a7a6ac4382cd83b96e3f9. 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/QZWFF2382921.