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 0x8cfa703e4d86b60cede2b6ca0b0ca6709c811c1d6d699e7a7c505cec52c795f2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dee1de6-0788-49cf-b0eb-b21a4c9c04f0.json and https://artists.proofprofile.net/proofs/artist/9dee1de6-0788-49cf-b0eb-b21a4c9c04f0.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 0xb3bec910b68bf3cbd6c403ad6496959ba58983794996f354cd96160885633bad. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62396447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c5df5e4d03e1307930092250314505cfe0bdb465ad5c568e5270e7c23b4716. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN62396448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11eab8cca19e026032f1223def638afce227f3a0a342532a9f315f92acc04c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92316872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb328643402ea869ad9f9ca53b625fd84e19bbe8dc4438966e74911daa1c8c74. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWR2347736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fae804a023635484f9c21b180a3b5f5be3b7e6069a35c9ee30f847ece993e6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:43Z), 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/QZPLR2300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c38869164f7ce17c8495c23db7ff4c89df25ddaad1f8a6ebdfbbb0b538ada3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:38Z), 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/QZHNB2424441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f58e88219a7e05fa2d73661bd5a7778136cd8f024828ae2496f03aebaa97701. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNB2424442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b237b1701c8183b85af175bef99b11bd7308cd056751781eadfbdc5c0f6d824. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFU2459025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7f3d172ce5ebec52d0d86d4ba6012f403ff9bc27be7b49251d8993ba081e3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7X2529653.