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 0xa18c7b78e2ce85c28e00277855aaed2f0ad15450eaf925a4e8f78e79badfc68e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7bd9386-e41d-4fca-9bc6-6d47f674e9ff.json and https://artists.proofprofile.net/proofs/artist/d7bd9386-e41d-4fca-9bc6-6d47f674e9ff.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 0xa6afc7528f829ad01eb1e68dec2bd2de41617775f18dcd5e20e684175c3d9471. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBSMU8062300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26949900d48e38e87fe2a56deef15b9260df94f8a890e1e0461581246d5c603. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU8062301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cca760400b55bc74e41ec885fc67112384333c3d900a8f81bc69f3e2fd2758. 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/GBSMU8062302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf444718c74f6d499806cf38eef80b52ad8662731e15296db5732e8ccb0e27267. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBSMU8062303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23052f59730e864053c323a1d3d3b73003bd63d9a2269c276ee23e45e18a245. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBSMU8191080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e9b8d6f0a7770dbf1c2b740fbb7d26817b59f86132d2f96de79abc8bd3642. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:14Z), 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/GBSMU8749505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56e1dce4c56dc35e4e8088978aa10bcf30e790acc863442a0740ff81247cbfa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU8793047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac717e18d4174c4fb81d121b15440c69e1c01c88452957966d2a5e9f1a2f14. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBSMU9360774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095e6ae874b2c6cb9e6353eb1a966ec70798a039f5d5cdcae4c4148eec1deba. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBSMU9360684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b9b02ed36eea3785bd7d028536a2666ddf74bc2a81e3afe7434d7e6388b2a. 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/GBSMU9727662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c1a9c3b486a78c14d5ff62b600df8c31076bd9e9fc720fbcf8c5db6edbfda. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:54Z), 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/GX4R52369571.