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 0x312006b26068ab475b0491b6bc3e3d9cb64ec958ffd4f408351a508172f9fd26. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a35f6f5-e05a-4eb2-8223-fb1af8a0325c.json and https://artists.proofprofile.net/proofs/artist/4a35f6f5-e05a-4eb2-8223-fb1af8a0325c.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 0xf144362923da68fd711d5973be53a1fa7e6f5552022f0cb69ac438058e0703f6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:22:59Z), 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/ES11D2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2100d8245b915b6bd5bc0121ee61021976be48a0b59b83bd0708704e132877. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES11D2100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc63356153c87e8b5d860bdeab72c24fd766a14b754b5ec2e254c3429bf3f1f. 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/ES11D2100705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54582737cd8d7ef4c082b3e37c7652bd3f2f1c10f90601e41bac67721ca72ce7. 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/QZDA82571458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16f0fa4d26ecfedb0ca448e319696885e3320f5d558742ca830957027b0835c. 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/QZZ772530665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354ab92839d7d7a9dd39fad62b921f9c45a828f376e291af8057d01608f60547. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:58:12Z), 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/QZZ7W2502920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4e13d92ff51235ce014d20026847ffab1a2d07b162d001806f3ea1babc9ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR2X42148030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4e13d92ff51235ce014d20026847ffab1a2d07b162d001806f3ea1babc9ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X42148030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052a75db9beea5eaecc904247dcd21e049b86e1079f86cfc4c7448f69b5ba05. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2410520.