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 0x79c9097ad1bf83d257fbcf360b64b39dff108af509a1f5ce964b7db31aa7f5cf. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a60a65c4-9e8a-48d3-a5f8-757bf7238be7.json and https://artists.proofprofile.net/proofs/artist/a60a65c4-9e8a-48d3-a5f8-757bf7238be7.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 0x8a6dd9bf63504b93f550baacc7cbc7130d9a9c65c6b949a8ec3090b5fe3b73c0. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZHN42319341.
Hearts on Display (Live at Warm Studios)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ce7f3efea27d1a29b99f6104617fd927f69e13aba53c521bbdb8c7fa73f525. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:15Z), 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/QZNWQ2437057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f287a30e0f5b9b1d97136531648dedae9c210388e01fbc79ccf0f490576d13. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:40Z), 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/QZWFN2438678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20769430eea6c7ca1f53eb681c52c9972ff9fa3d3b54e60261f33cf704449fad. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFV2449489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d98d223962392e0fb7f92f17dadf5d6b7c0569c48b5f0a6f46038ebebadc2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7N2436024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6dd9bf63504b93f550baacc7cbc7130d9a9c65c6b949a8ec3090b5fe3b73c0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN42319341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf02f362974cdd99aed9893620469fb0d989c1d9cda5a3a91cb8776fdaad767. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA72539625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4f403cb20f18698ebd582f015d7f021da85adf62ccb2156b1c15e728e9493d. 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/QZK6Q2505558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf02f362974cdd99aed9893620469fb0d989c1d9cda5a3a91cb8776fdaad767. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA72539625.