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 0x8b3f1036b02db285dd4c6f082717572682a95b724ed1389b2fe437d7424f4427. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4279d7a-41df-48dd-be00-7bf140cce0a0.json and https://artists.proofprofile.net/proofs/artist/e4279d7a-41df-48dd-be00-7bf140cce0a0.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 0x72a86e1f1e24ac084ce368b5aa532ad82cb776660e8f52caf5f2debe13d2509a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAN112201139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adca343ef61b95c6a1c4b146f90b9a1fa46757bec1ccf1baac41dbf54150561. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAN112300524.
Hannah in the City (Close Friends Story Version)
Hannah in the City - Close Friends Story Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ea2f5b1b24a5fe6c04484f8bfd3252a8e27169e2e643a39a374f0c1d02158b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAN112301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c721f316f756e5101a7d9590f511e6f971a37c42ed57c87e84b6ddcd118730. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:01:19Z), 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/CAN112402112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c721f316f756e5101a7d9590f511e6f971a37c42ed57c87e84b6ddcd118730. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:49Z), 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/CAN112402112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175868f7a565e1d5870cc547eda8e5034153d0e19043706261f4e64a14e7c6ee. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:58Z), 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/CAN112501234.