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 0xd168ebd1d944d0bfec2a1608544af3161c377b8fcdd87f1bb66fb7201c062ae1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbafc65d-c005-400b-b00f-f7db34e5e1fb.json and https://artists.proofprofile.net/proofs/artist/cbafc65d-c005-400b-b00f-f7db34e5e1fb.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 0x0b94bf9763ba039cf0aafc13bc0e05b43e47c37700d47f95bd0d446ae0260171. 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/GBCFU1000233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0f0f520aa9ea3abbc9bf2c275de8b22890fa2b32ff61b19b57fae95d44e4ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBCFU1000234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887554b8688895a7676af2ea217a218943ca64fa44474ea5dbdce1546ffd254e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:30:09Z), 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/GBCFU1000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722471ef311244012af2093828ecaa442d284926be53e0f0923e0a8b1990c3d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:51Z), 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/GBCFU1000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553255bb0b5ab202637e6714c19f05680e7209fd3efdbbf3819867fcb0b3b395. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBCFU1000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07deb07c7c261b50d55b7a5601f522842ba0ce8e32f4cc4b1f16fe12756b3f40. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBCFU1000247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a829ac580c659d92361d14d81023b83f00369c32e69c01fe5d29f0b44c703f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:52Z), 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/GBCFU1400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d4af1b3412223f6e8509249039aa15b2609440732b925ca3d104797d981ae. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/UKDNZ1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a55d8e6d2532e7752beb66df9fdd7643adf073f09cd308beedb6bd72253bc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:32:46Z), 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/UKDNZ1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a433d1fb558b1dcc06e54380aa7ac2b3c75f1493bc72a048907b1702f4e2ec2. 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/UKDNZ1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ff3d90a6530134b00883f5a9af9d1a18cf0fcc0eb4c6961eeef3b7f1dbe6d0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKDNZ1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b95e457bc5637c0da847fb62012056d28f952d22cbbb2ade5b041b252ea0fb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBCLS9902076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b95e457bc5637c0da847fb62012056d28f952d22cbbb2ade5b041b252ea0fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCLS9902076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b95e457bc5637c0da847fb62012056d28f952d22cbbb2ade5b041b252ea0fb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBCLS9902076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b95e457bc5637c0da847fb62012056d28f952d22cbbb2ade5b041b252ea0fb. 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/GBCLS9902076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b95e457bc5637c0da847fb62012056d28f952d22cbbb2ade5b041b252ea0fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBCLS9902076.