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 0x672978d3242d6e4078b5ab955178f6167107824cd823ec537a7e10d51b1a54e1. 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/d28e7b38-59e3-462e-9d91-31a467d633ae.json and https://artists.proofprofile.net/proofs/artist/d28e7b38-59e3-462e-9d91-31a467d633ae.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 0x23200a6b790b04b034158d490b2a803163e740a9025638eb8936ef0652e87c65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2437463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c978e406438fe0e89c2f618da4d3cdd355cd378b5196e21ef2615fa50c38354. 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/QM6MZ2437472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c34d74f68f402d4de1554c527aea452df7d5f2d250773512cdd38aef5663b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2437470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b87efe720a2aa68c3abe5dd67fa9143fe89257ba3046c1784bb9246211f7a1. 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/QM6MZ2437447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1262db0da44827598c1e711e0a974a886da78110d2e910ccbecf5be90fcd8404. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ42457004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1921ba194b3dcaae0bb8ef473a508ad4c13ad374c806438f352c425faaa86c65. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFK2317269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfed5804a435426dd61089e9d54e36f59ef799277876a3553467314ac63f9549. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:33:48Z), 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/QZTBF2356515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7048f387a0d627a4bf484dbafad8c974457d2425b12fe127f4e44dd56b4f579. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES92325224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f543eaf19a901813f6ba6ac5e4356dd399aef71f64ef8b74ce0893aa87a582. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGD2295893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cefd460b70ab8c584395aa3f4b8e077d27b10538136f69feee2adca6782700a. 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/TCAFW2188098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094b4eaf0c07c69e45d85283aca12ffd05ffc4a108e8a990c69cfbbcea036c58. 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/QZWFE2325767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60514ded52911a3e7a8dbfc9e53739532890622c882c123171885e3680380a. 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/TCAEE1934321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094b4eaf0c07c69e45d85283aca12ffd05ffc4a108e8a990c69cfbbcea036c58. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFE2325767.