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 0xf6de9695dc4f8281edb71097117160eb5ab5c9cfb161954a5ed66fec5da73d11. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c725c76e-e736-4376-9073-c0f8fc488339.json and https://artists.proofprofile.net/proofs/artist/c725c76e-e736-4376-9073-c0f8fc488339.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 0xc3fccfa67bd75b697e4692babf2a1b0089227f5a39624d6f498c2c641941e9f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPY2479475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171074b97adfadc9e31193a83758503026e0b737cc2e99a61b15c4f7b7374299. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCJPZ2482417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee283b66f1f1f642662d1efe31ec0922998208ca9cfe4634d26a1887f47a2c6b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:23:01Z), 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/TCJPC2431117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab195a649d82429dc16d4e15b1422552386b15bcfe0e9b7034dee4d3bae3ce1. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCJPB2476482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd04d4f00798d8143828f66acb1696b22494df39460c2bd6010e2ea568094bb. 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/TCJPB2476484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3558a48dd4a94126856067d7014ddb2cec35834fa5ee75f5ec4c33d89410285d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCJPC2431119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f341fd60ef33c6d244f40e5d03644719594071a69055375eee2b546724ab8bc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPC2431122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa937cfa14722204758aff307f3ea6c8bbaac98ee54ed49c7111a86d4ac21511. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:53:35Z), 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/TCJPD2543323.