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 0x0394bdeaa4928b892b10dc9ecc32d5f8051613fb6c072d9fb1fbb90b5a229520. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb121a77-e33f-4d23-9bd6-08fbb0982ff1.json and https://artists.proofprofile.net/proofs/artist/bb121a77-e33f-4d23-9bd6-08fbb0982ff1.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 0x6ad28dc5470dd348267975e42b2fa924fa044d1471429051ef0698d7cde8775d. 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/NL4NL2128540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d391adf841c2fb91120c884855d87e2ebbb7a13417e7e17ba6283bda231e9de. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:35Z), 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/NL4NL2216403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe35c3ad30676b583f697ee240cfc11c1f72e7755f3e3a51c01efc094250e77b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NL4NL2216404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aa2e25ff2cda6c72e47bcfc8467ca8a194d0012a367a2e549137cb6a35ad6d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:20Z), 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/DEZC62339004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305776b16e87a95eb242e9e123c379c1875babcfb385442f7c6231cb59896fa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZC62584254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8884727037ce9121de6cf39184c1b3efbba6c678aeb1f25affb84b15a6440b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEZC62584255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22f075e8e2907ed8471ad825d4dc5cf1ef312e8eadfdb1df4b65949682070ea. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEZC62587970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58447bd544df3cae5a1c0e6a38b90750fb44d3082eb2582a9899966b4102aca8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62587971.