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 0xd7d230df1529f76471b7c4ac07332507373d0be43e6188383de71ae4e18c1da1. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/014a5f1a-9fd2-462a-9d42-f64eb7b0822b.json and https://artists.proofprofile.net/proofs/artist/014a5f1a-9fd2-462a-9d42-f64eb7b0822b.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 0x2966513df90df82b4ad5a17c847b2eac4b48d1e1a347896bedc53cb33373d2f6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXCKW2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b4a626d57e2c55a01347b8c8e5073fbdce68d68b90ab71a7dae783d6626778. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:47Z), 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/GXCKW2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9548fa181c03ccb249a1077050d891e37ca34a4476ae9839847cadf912b02a4. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GXCKW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5748c290dfc5339172077bcc5729b178202f9c3ebe2aa8a8dc803d4274896d19. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXCKW2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b1e450e1d0b43b4083b4d4b53f376decefaac9c52cbbc00e5cb5eaee42fcd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GXCKW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43ab07101a6d30a047474f07d9a4905b3f66e8a565c33f6e351804af0861641. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:27:15Z), 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/GXCKW2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1c361b91e04e28b57748985cf82275d0c2cdf5d5dd341ead4dda96fc307667. 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/GXCKW2500040.