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 0xc131667b682af95e75044302ff5c9832bae1c70e1b9d732ae69ace9dbbbcdff5. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/110c5473-e321-4616-8675-52771212c5e0.json and https://artists.proofprofile.net/proofs/artist/110c5473-e321-4616-8675-52771212c5e0.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 0x33dd67fd2377b829d5fc3e6ee21f91b5c86e4e134520e01ba8e8d0a7a5984f7b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX4R52339469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b9a73edf92a67b4b78e6e8348c64ea8e156b58cf69890fe5572dd31dd60aa5. 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/GX4R52360838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0133a4fa558ef388744a7dbcbca3dea9a46eb3d29b7f7d0936bedfd86d4db7. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GX4R52344100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51059c306c371b0fa9afd009afc11301747013bf1a78b82530ef3317ddb6d825. 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/GX8KD2473178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12c881cb283e08b32c40da62c60ab8ffaf1d18ffde3ebf45b7818ef522ddba9. 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/GX8LD2402713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a03dcce5d11d178821824794274fef0174507ae6f3e3da7576ac2a276bd4e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX8LD2465687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db6642896b3833746636ceb3a66af79376d7e8ac10a024d60df68939157fbd. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:37Z), 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/GX8LE2486056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f590df2da7f714e6db5f87198f46a22919e7fc4df52753c6c08ca8d521df7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:14:33Z), 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/GXF972483847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238ebc18829303506d7fcbe0f8faaec4f714d4d2555ee02db36541cdbbdf9da. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:45:03Z), 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/GXF972407127.