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 0xcef9bcbf29d052bab12f618c76023135f64ef731f1cc07900840e8993ebf1c64. 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/9f63e6a2-1e4e-4d55-a80e-25cb550e3c85.json and https://artists.proofprofile.net/proofs/artist/9f63e6a2-1e4e-4d55-a80e-25cb550e3c85.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 0x86afc53bf36ea4f963593b78b5405998645ccd6e2f4800b52900a5d85a9d5775. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7L2443391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b7996893ca4d2ff20a5baa417a441e5a1a0a9bd21339e9cf5f64185a3848dc. 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/QZZ7K2472843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c8fe43db0b331ce1508573ee760ab77a31cdc6d41ebb64fcda71f922b7b085. 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/QZW9L2453215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bf9307d831c8ae2c5cd93aced060dd6ed73bd0efdf9edd8c03e836074d3dde. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZW9M2414647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abff672138691708efb0cb2025de5c92a3080e8c220f50d5c21495e7054d979. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZW9M2468255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0416b8e428da29afe3d7fc6cc4d9a4b4935d92cbf26fd281f2c3d50e28c8baa2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT4K32506995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2781d8e84b59f4f66872d50ac5a95c6b09e248f201c03ae75b5947c993683b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QT4K32505785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c93e66b45b8ea0056c567e1daaebe242acb9228fc3846209d4048c95d84ff. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZVEM2593844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3283d45c49f3998fce457a3ced060a5a1eff175034662c913d5daebe2a969cf2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:03Z), 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/QT4K32510555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6ab5d6d718c21f9bef821547ad11b53a2e4faca123b133d3647e0405d6070a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT4K32514153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c2af55430834bbd2584b9497b94e6a3263d6e94acc557d591ccdbb03a65a2d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT4K32519900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1641ca1fedbeca811b3a034c30eb081f7e13618f3f4f6f90d88d7a105bf0662. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT4K32522218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b1c4825977c74e10d943fc3856937f54049b29c97bf93884021ec769a20567. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:14Z), 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/QT4K32553283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276b4d85d119986aea8e48372ee3855ea50013c3111a1aa96100a170b493044d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT4K32535312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d016b6106f5b4b446b9081719c51d60b58a650d5358778103b0c2e1fb436a. 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/QT4K32541391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b66b96405afa8fc44fe59fe6b076a91e3a2414d03cf100b3ab62907b613428. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT4K52540652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e5e118e203b72ffa914bfd62a2f8680d34681ffc148d0d4df2e255f49b9187. 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/QZNJX2515510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f2a42e1471801697b374295ef4d659010c76369e99eb9301a36d795976883c. 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/QT4K52579892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bba1f683707a321930819897ed6753fb29fa8f50a0c1244ed870dbb63eef82. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJZ2541207.