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 0xfebc65eb20a16df982952abcbd8898e9fa9e16d99ec87fd3bc845a09b44b773f. 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/7a42399a-bbb4-4ad3-9fd2-2cbbd56bc7fb.json and https://artists.proofprofile.net/proofs/artist/7a42399a-bbb4-4ad3-9fd2-2cbbd56bc7fb.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 0xc6f36953b664666a07e4c73ee4a32327b1ba718b78743141fed511f191bde0be. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:06Z), 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/QZW9M2275609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd425ee3ec1f584b9e2dfc24110bd0cc50f28d720e3ee0c87f71f176ee0a8bd1c. 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/US7VG2429436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f89261a25cae7bf6c3ccd29a0fc1b9093ce91c2f5223f30b5a367244e8bfd49. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZGLM2438466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9b17d12fcf29bac05975d81372b8881f81f29cc47dc873060e245aaba6c9d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2483395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b5ca5b5c6330cda626c5de84af1c699e55f8b4f933e43a74653ef09195dfa1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9K2447752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93faf789a97d02ed4365931ed624b70377f2b9998c89b94bba825a89a27bc43. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZGLM2584237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b8a382052a7cc60cbe87063e21a67b1181e3be68a534a9abea8ee9836b3963. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:50Z), 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/QZGLS2552448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2edf0c9ac0ef18c8e8a07ad1e9c6f099cb798144ac525bb18c9999f30f8816d. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZGLS2587276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06f7052633e740f240ae5912b3c182169b89697cda994251fe5a2e9ad3a5c22. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:46:18Z), 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/QZGLS2587669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838b28ba7696692d10fb9b317011ac32dcf7fc56265068754e476db0294e2ce0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:46Z), 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/QZGLS2587670.