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 0xad807c7178f432681ea231b8306fcf299eadb426052f68febc21a16912422e7c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0a84d62-b7ce-41e8-8ce4-3dc9dfc0e70d.json and https://artists.proofprofile.net/proofs/artist/c0a84d62-b7ce-41e8-8ce4-3dc9dfc0e70d.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 0x6c2a2b95e8db0d0ad4328b72efe29da08764c2e84355f90497b18ffd01ddb618. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJY2538511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55799c2973075d934ce525c292b8fd64e98bb4d72fef46e57451f6a4bf6dfb49. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:37Z), 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/QZNJY2538568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7747475f2773e69a95a3600200c58d0c4c70f6de2607025d9d93347c015aea. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZNJY2538412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4116459e5fd3a97e625e3f0fc7ed65862a7af755a37a4b3484d5cf6c4723c988. 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/QZNJY2538546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef2513e43b4e95dfed5dd164d160b02e4d7025dc2591097090e78f61aed3e61. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:08Z), 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/QZNJY2538567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276879c7c1395eec86d5f62cdfc6ff0ecca1b2ac63d133b307e1679ca069d27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJY2538571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b85f8cf67ccee0c143d7f20c393ba0227cdfb4b2b5099f38e7866232fba87ed. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJY2538506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee026a5211d149cfbac1c765215e58cfb2a3fae6b4c8febf9e30444711ec055. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZNJY2538436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7987707050754473779fc6b0f65f6e5124f59db9ea472310fca0b9e9a9bb467. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:35Z), 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/QZNJY2538564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078c69f7e1efc7c30d8757f7cd64aca64f6cbd8b0188be673990c0e25ae90b4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJY2539296.