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 0x0efe75769a54a1f5a24fddc11fdace601ceb15ab7f6bcb12be5799a097d8c2b5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa37a009-85bf-41d5-bd7e-fc76791a96c1.json and https://artists.proofprofile.net/proofs/artist/aa37a009-85bf-41d5-bd7e-fc76791a96c1.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 0x6d9faecb4b319938911c8791680bdd04b66b81655151e1a90096ea8267c50a36. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXF9Q2535051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479ba77081945fdee1be21db09b9a3c1b33b2f97a5c41f071463ca674cc9455f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:47:45Z), 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/GXF9Q2535052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b98bfc5795356e0161bfbea2200ee1ead4569437e3cfa38f750ae5f84d509c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXF9Q2535053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16f1999d3d121257531406159feb197c2b79943197868f091a997d406eb7371. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:36:00Z), 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/GXF9Q2535054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba82e8d99ccd785dc0b02f9252bcfc4a45c8e65ab7dab871842b1c1b8a88c97. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GXF9Q2535055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61889fa9b670c884b2f4abb6bb10db31db8f941b476b3a2fda8f6d1a1fdde457. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GXF9Q2535056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0396627e8050facabc2443d1c7b429cb0af332c5b25110b8a4b848a09727038. 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/GXF9Q2535057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053d014aa08ffc202b7c064159db1da01a316f244060c17a42febf435c5f84c2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXF9Q2535058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663774b89eb6647371a6da51135fa3ab65823f342b289aeb8b005ab6d66cd205. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GXF9Q2535059.