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 0x52f5dbed23907cf3ebcf7f50595092d0d6aeb98ede9d90ca36e7c3f5c85bfdff. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0727e860-dba3-4b00-b570-c2954494eaf2.json and https://artists.proofprofile.net/proofs/artist/0727e860-dba3-4b00-b570-c2954494eaf2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
His Sweet Voice (With Anthony Marcos & Fr. Suriel Costandi)
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 0x1c9eee74ca95b9e8cb0153693ff91d1db11250582b54142da1ffb91cccf064ea. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX8KD2316558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4b739fb327c6629463aa89ecbd31e9dc338b8bc2ba3c015401cdd275d49737. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:07Z), 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/GX8KD2375027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088d0c76330ef8a0fc8ea6bf0ee6ad43e32e0e71e8c027694aa76cdedc381205. 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/GX8KD2390303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d74a11ed8381b3233f2fb92234e28ad7b6fee8e4767869014d8dfa4a823d8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:18:43Z), 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/GX8KD2366860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd398511f2e6274ee7525998ae447c63d0e7383f79f5d6bc56eaf15e4416a254. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX8KD2385196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e54eb8b184c032b99d2506c6628cc6ac694eadc2aac18019dfd2af4582435b2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GX8KD2341032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053bb73a3b10039e0b3186fb24d15e42b54d37b18ae7834d36d010a24a19e35. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX8KD2336096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18bdc52fbec9f6a4241538429fb05516cd32b996eeccd646b864c3319368511. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:47Z), 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/GX8KD2373034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8fa1aa28fbd0a072e8fbf3ecf4a8c9bba523fa8059aca25b506c144791758. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX8KD2377305.