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 0x4dd40fa4d63d23906c6351938f69957d745acb4755ccedc6ffd1dfda32171e4d. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99b8ea5e-ff6f-4b81-9a21-8e785d2141fb.json and https://artists.proofprofile.net/proofs/artist/99b8ea5e-ff6f-4b81-9a21-8e785d2141fb.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 0xd7845092f4f24b09476650be3aa1c93c2d11e02e923e63b50865739ac9afa74e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USERN1010003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eef8ececd4a3f4cc98d86b3a1cb5b243e195d5c746cde00d25799218f3e3d1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USERN1010004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df698b6d627091dcf7bb0fa6c71fe4f8d7655d146f179b1e76bc3f9ecb71df5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USERN1010006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a6514463e04c9ac76c6cadcb39d6ad6c699ada9483ba98ae764e103873c542. 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/USERN1010007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40c827ea70d41abb3b752af0e0cce6c1e1af8ab37dfb0c7c125c9d8022c4c22. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USERN1011070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6228d4327369593b8c83972e79e909e3e6f9c21ca08d7187f4043f4037b5f7cd. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USERN1011071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d20811522391418c32c4348a4c2fcef285cdc4a180badd5154af26bb006dc00. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USERN1011072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf955a97386cd1e81c63f4c3b1f081f0f59d0c9f8ae269dc69e39819c79eebb6d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USERN1011073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ae342d20f9c61db166418f13f69cfd53b635d41cbda03adf2deb6bc9f1f78e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USERN1011074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc731c61651fae40324175612a55d44a24d43811d324958123de98935d89e9f81. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USERN1011075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c8d9e9fbcaee081fe186b7c3909c09a5cdd51d4171ce22e66ea9991ff3064. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX2324327.