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 0x0e09add5fa6c1b17fb03261127a312da15de8be52201f50fdda50dac71ddedf2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbb7e830-b39b-46cb-851b-3e5fade4c5a0.json and https://artists.proofprofile.net/proofs/artist/fbb7e830-b39b-46cb-851b-3e5fade4c5a0.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 0xac27bf6dc682215469d7a3898be25b4367cf1992d619cee19b9f3698f7d26e29. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZ141700460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a4f7cfaf4701092cef93643ee0d546dd35e054bcedb42aac91b563ab0f903f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:34:22Z), 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/DEZ141700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5312781d35353908ca50c660673f3e84d88f35dc95e303b110e0f8cde349f7. 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/DEZC62104750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02ad93468f7ed1ceaa4925ba85eece3dea4b4b9a5c109e5a11ae6221323019d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEZC62173287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbff9ae55ac748b03564e4a78412a0a56e251113f05058100e638ce8458f1fe. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:34:28Z), 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/DEZC62173289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5662f056720e162b8d75d18cde32e1eced2020273c58e6e23e850fbf9618aad. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:48Z), 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/DEZC62173293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2694923e04d5282729e7c3f719b913558bba939a02413b31d7922990f55e055. 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/DEYW82206811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a7808edad3e2cfc4087b54d13d00a1e36d5e599fac9286c17b85d81bdc99e8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:49Z), 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/DEYW82405022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3b7742d27850cfd83db9df704bc70c95d282d40d6d61bb7a765e715f3b5e46. 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/DEYW82416423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2694923e04d5282729e7c3f719b913558bba939a02413b31d7922990f55e055. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEYW82206811.