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 0xae938e2c5aab03cccb828268049856c6be457e18ea82e3019865829108042199. 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/921e04bd-c18f-483f-9189-4d61cfd4a1fb.json and https://artists.proofprofile.net/proofs/artist/921e04bd-c18f-483f-9189-4d61cfd4a1fb.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 0x00d9596250adf654599851a869ba6fe1919d5181d5f51bad15d112d062d3e89a. 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/TCAGL2283463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdda57079afeafc88ca8b754a5b510a3715460f2c7cf8c81b3a40d6c9beeea6. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/GBMA22406287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e891b1cfbc7d18b703320460e311157f915a6ed5aa15872b496197d76ba69f. 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/GX3Q92369408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1436f4b545c644a37119328613f834c0e51335c276442a5545e469c00d4fb0e6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:59Z), 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/GX3Q92377018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c5ef8a5637bce8dbf1a8f82511480f04292a43a7b56bc117d3e3ddc0caaba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBLFP2368384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3426bfb123147c3af8cabd70cf024eee39855b57f702748a33000111711ffc. 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/GBMA22344877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ee3dc39ccdb093457959d751d2830c2a4dfe0c16d07799923536896778c73c. 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/SGB502399979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06c842ee2070855a67d981376259cf245b5824aacab109152af2c7234ab2118. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GBMA22350765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313241c12a5fe6a985dabd0493c11dc1c18a44922ff10b9a86a0d5d8dd9cc80. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:42Z), 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/TCAHM2320762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34e05e0aa12b9a9235ff88d7824a01590c15bece2316c78a86d712fd1d88c94. 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/GBLFP2534464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7f2607a328f11eee3f4bfed739ff43543eab799061cf7bb83abb0ea9d9808d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GXH2J2506457.