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 0xf949ac4eddbf23126945030ac77df3537164454eb75088233772f7f1fc26ada5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/826274a5-aa29-4656-96f9-e41965b5de56.json and https://artists.proofprofile.net/proofs/artist/826274a5-aa29-4656-96f9-e41965b5de56.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 0x6c753ded58cb07b80d518ed3f831b00d967077abc6e5f38925ae80d29613aa6d. 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/QZRP52131694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccf4b28e644146a5a68c392bd880816f094042ed12c8bd99d4409b58eb5946. 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/QZFYY2209230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2441386a67ff2d18753654bce383cfe729b19ca84d0d418cbd89ce48c9dc865. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTB32290197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26946ecc177f61a3b34c10ee411a0cbfd54b8b8ff65371e88efdc176ab7e1bb7. 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/QZTB92275946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c545241892b423dbb55f6f1918a04375400f5ca84e19019db4b73bcdeef6c4. 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/QZNWW2385509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7666ac9c3e4e9aac1a1dd5d9017a4e13108e5ab0e1ed45f3cf8f128496423516. 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/QZTB32376976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c8ad7d8e34a91e951e6d8b3489cea9d4600749e1541fa7c0b07203f82597dd. 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/QZTB32376977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf523f2809ee05829002b6a9506a53966e3bd968c609ac748ecdcdbadb2b366c0. 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/QZTB32376978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6206fa20b8800ba18327dfa167d12d241339c146706f53b85040d7262b7d88b. 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/QZFZ72445364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedffa29ca19e459f693c4e56fa20ec4058917e41e83f8cae2db1c54a09e426f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFH2334183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c545241892b423dbb55f6f1918a04375400f5ca84e19019db4b73bcdeef6c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWW2385509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5476c9a9c7e4733846c3ae8cbe7ba803e5b817299297eb6b8daa2b02bb2f5271. 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/QZHNA2356986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c1638811436ddd40d2449dfb5f93d0c43fb69f6ae513c0a1ea3d7a5d3c47bb. 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/QZES62334808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26946ecc177f61a3b34c10ee411a0cbfd54b8b8ff65371e88efdc176ab7e1bb7. 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/QZTB92275946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdd0ad669035be608767b66ed6761555bfa1477a3b37b175baef83c4c871350. 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/QZTB92224714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccf4b28e644146a5a68c392bd880816f094042ed12c8bd99d4409b58eb5946. 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/QZFYY2209230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c753ded58cb07b80d518ed3f831b00d967077abc6e5f38925ae80d29613aa6d. 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/QZRP52131694.