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 0x9d335e2b3a5dcc41a51cbfc3901731c1e2bd6574d67cd46cba1aeb45561f4ddc. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07f18a18-5fba-4109-8e0d-2ce213c676f3.json and https://artists.proofprofile.net/proofs/artist/07f18a18-5fba-4109-8e0d-2ce213c676f3.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 0x24425b5c4cfe75b10c0ffad96ec41ae34f078c251822a698ff668c7e12feaafb. 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/QZZ972424920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737527cb9337b4cb3e1061f3176aecb1ca4bf4c1730d6a89ff7fcb6f21a531fa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ972424922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb726d2c8c2797cbe4b75cac28dc23ae7c603605ca7076d8e5902074fcda06b14. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:57Z), 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/QZZ972425258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0605481ef93ada622d29f74a5446a733137cb1c275074fa44c2a787bfdcbe96a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ972425259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c19e9fa5234f8894d12de685e1de6e93f6c93e38633635bef7f2145ba5ad3b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:28:01Z), 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/QZZ972425260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159291b6724ca866950088062312f0f720f62b93e26d067c15e0d88386c3fd8. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZZ972425262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ad59b05e1fe6cff9c850bc93c7033b03ab158feaf2f1fb8af58b55ebf0f67a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ972425264.