De facto (, ;Random House Kernerman Webster's College Dictionary. S.v. "de facto ." Retrieved January 12, 2018 ; ) practices are those that exist in reality or effect, without explicit recognition by
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 0xbd41122e557189c187accabe718c27a693f7e11ec7b236af9474a05dc1b85f2d. 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/89812bca-74aa-4a60-888c-3a3ecede1219.json and https://artists.proofprofile.net/proofs/artist/89812bca-74aa-4a60-888c-3a3ecede1219.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
How Do You Dub? You Fight For Dub. You Plug Dub In.
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 0x8ae4e90a6343fd4d4b840c76895f11700d05de8e33e6aa9240f775e1a4a44cda. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADD1721236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fcb1acc58086b14cae8383397a127cd06eb33bbb0db701363e01dba1ca8c11. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADH1777779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c7402b03ccffb5ad4fc71bf5a24120c1e3272919926e0036ae7893530259fb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:22Z), 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/TCADM1810473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59447e323865cf80667d48347da07830fdf7a3f99c22491be8e45c3e602431. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:31Z), 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/FRX872042623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c17c6236478bbdddb3d2a99eace91ff73f0c6f40a4dd81436dfba8df3bb116b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX282112215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64f874bb177ddbc61654c11e5396cc94a6f34010425d79f0a8afb6f50c71ea2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX282112722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1a148190066378087ab59ef44a811c188bc77644803b00706c0a546c6b414. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:36:35Z), 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/CH7812357487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3319b79da307c6063ed710214ed5008518d644ac713584262ed84ac932bdfc63. 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/DGA0H2439185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f57720cdc9834879a322d99a82fb198b418ecc029769057d790e000d0098d5. 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/CH7812217407.