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 0x4a8abc9f371a3a37b3cac7c6396b89faf1a0b4ae2d00e5502c18a3fb9f6f5404. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e47ec3a6-feeb-4ae4-8ddf-b53649066da2.json and https://artists.proofprofile.net/proofs/artist/e47ec3a6-feeb-4ae4-8ddf-b53649066da2.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 0xe133dff9e7d25d6b5a91a67273259285431bd3b4604207bfd6430d492a9d8da2. 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/BK4DA2446710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d5a6f4e215562562ef508ac4898068d0fc17a0e2a698475ce454ac9412d950. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:58:12Z), 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/BK4DA2446709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf774cc4814cb82ba2619f7aa1d88ac0b5178d77fa631a131ff42917aa8887acf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BK4DA2446704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841d1cfe87324313335f76b09676f882b4568f9952e63df2c2b9404fe2f9a49. 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/BK4DA2446701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19035213f1b97e52f8bf8cd60d1bdee21dcc2216fcfc83bcf19a7511870af465. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BK4DA2446696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7b5257f2adac48eb8f3cd13e7d982dabf0dbe809dc67270798677592ff72ce. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BK4DA2446707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e575e199843ce039a884eb93836927708ae47ed15bdea17449d520d0353796. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BK4DA2446706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013e959748ed478d2801e46d214c8fc3add0cec5713dae7eacc05adc3b967a46. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BK4DA2446708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d0a6ccb8e42146351e2c1967e9132ac515d1e0d034e6d9388dd4431844cb32. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BK4DA2446703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfc8271ff17bbad9bf591dcc7ee404607e009f0ba132e32b97af28d415bcb2. 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/BK4DA2446705.