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 0xbf36cf9820c7e4a80f96336a3be6195467cd25bf71184fb5764a5246ca5f4646. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/447f7741-5423-4779-a3dd-2534af4a3ae4.json and https://artists.proofprofile.net/proofs/artist/447f7741-5423-4779-a3dd-2534af4a3ae4.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 0x2bb4299375111d8e2797abc3a8568d5906812139703305703a3a5571ba1629c4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:34Z), 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/QZ3B22310042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2da3249037b5c9ba2cacd252972cc1805e43e3e990ac69001e55dc23f0031. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZ3B22310043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509639cdad68441fa73541131e5055f5cd509c0788a6ef517ed2556e7d4b6f1b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ3B22310044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552d4deee30d63b3bc3b94fa2ae45136b64ff50a5fafb1241b55c3cdc8631d2b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZ3B22310046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dadab42178698368db8746b8e984a55f99e6642d45375050e42a2a142a23972. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZ3B22310047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e3c87d68e2da5e01cc166f4bdff5d88409d952b725d383285898f49e201e7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:09:26Z), 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/QZ3B22310050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962af3b39f3f215bcba6dd8446316c4d7ddc4710579415ecfd1ff28bcbb8233. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USARL2502702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae6ee3925148b6a769e721042cf7d6a4b604be579556b817c61538eb42284a4. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/USARL2502712.