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 0x8206632052e37386a4dd8ba327d04f53cdd115067a6b33a933be9ec3d821cd0e. 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/4e8673aa-a007-474f-826b-b11cdaf29cd6.json and https://artists.proofprofile.net/proofs/artist/4e8673aa-a007-474f-826b-b11cdaf29cd6.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 0xd4fdc088f88afe20ac1da68b29ee7d08b9e73895c9c1311553f202b90b98c547. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBSMU5223381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3ff80d50b1d7325222553d3dfc4491a0b3573050aa8d9aa0c5657db9bb5451. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBSMU5223386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6d77d51242b448b2985e2385d5076c3751f0b2edba5317ffbc30be2717439d. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/GBSMU5479610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ed9c5ce2a877b6f73c9d87c26e033a3cd035e02ad13d0286a77ac4988e348c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBSMU5479611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc96daafa0acbc804915f63e3348bcc3a6b66d7ea20c26a2e7077252d6e6223. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBSMU5570076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8401d1f02177e33d171d194e758a7b2135704a4b17468df5f41aff391581e40. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU5570073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273045a5c9248d56d070608b0091cf8c9feb5fdb1bf8865ad8bdc15886ee633a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:19Z), 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/GBSMU7138881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ca2ae64d243b574d50bdb364949ceb5604e7c8c72555a5fb367e35dc025c7d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBSMU7354273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71238557837a7d6b84de57df3cf1e7ba8d2e4494d8b27648cf12041d81b6b45. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:00:19Z), 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/GBSMU7356824.