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 0xa7a5233c4b8880695230bb7c1f5078c8f318f198d70a0fbed2444aeb22ea281e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00100d5e-528f-47df-8066-dcdf0818256e.json and https://artists.proofprofile.net/proofs/artist/00100d5e-528f-47df-8066-dcdf0818256e.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 0x4ba2927a945769b339a5daba03851749f78ae657a3f3eae028632960e380c30d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:47:48Z), 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/ESA012292965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc958120783c448100c704c1cfdcd9b70a030c517bf5a918e8820547c5c42805f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES75E2300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd640c9e95c4ab2a264a55fec04788679abaacb48ac127f776506bec12569559. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES75E2304203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845d46d8757792dc8a9109d34f61e83391c2e77a760cd6820dcf49b483769628. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ662409068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d306b0a650e58a9e006ec7eed10cfe274ee1eb3a5e094bda08ebe121133768. 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/ES75E2503637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8714f71f0a4cab2ee4d05da82fdfba2c944a2e187e9e4b6c8d2d671d14f346. 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/ES75E2503638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ac23d96ed1411d57fde3b2c16a7085f5230da2d5b3deedecd411b5046ade3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ662420459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21c2cd58c6ec3b012c44f9ecb6fc18ad24d5625bd7cac25861f211f23cf4648. 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/ES75E2503641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa240240269e20b6bfd982aecabf93c771956a8991684414e035bfc1d08608. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES75E2300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c9f034561db179de4037fe76038fd0ffdbf43ba6605340f6240631b0aee0db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ662329866.