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 0x142c4d159451325da4a31e7430a22f6cc6cc2756b77394dea0c60b0e49babee6. 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/648dc99d-5333-4daf-9197-c4c5eb641362.json and https://artists.proofprofile.net/proofs/artist/648dc99d-5333-4daf-9197-c4c5eb641362.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 0x2ee9c9bbe99ec24f4ae6bb6dc4b29ecd750cb0660740c728db0673e2a26f0a4a. 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/QZNJV2483147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c9f5c0a45c1e247c11681483a4be1096c0e890d124a4aaa785c9dcf41cc185. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX3SG2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3603a5df6b2c5efc32f1cbc21886564e8758ec7b5baeda3159d78f88f4d354. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX3SG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea6352617ea824544a1fdce33ced0a041225befe50c9f3065b286d676d8cb05. 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/BX3SG2300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7624bbfc14da35ad4a18cac2c2f7dc725d79dc1581d76634425c82c7d0a6e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX3SG2300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b8685fe32e9126ddbf689e9c039459cbe3b6041a9a43905bdede36fba2944f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJV2333335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6dd50271ce788fc65683d798d3b908e70985c5698dd7efb7136a579c7a29ae. 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/QZTVM2435470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b64e4b79b671c7281f74565629fe53931ef6769be437caf3439f69cd7c2acc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BK2NP2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff8c96ecd4051b1d25971e6494deaa0aaca5bf3c7340525d5db3b42fea38dba. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BK2NP2400122.