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 0x117d232180ff51a83a026b2390fbbc35ecbaa043cc4e7083ea8f2c01cf5cfee6. 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/9c9a4f44-6ac7-47fe-89cf-d3e68c7c413e.json and https://artists.proofprofile.net/proofs/artist/9c9a4f44-6ac7-47fe-89cf-d3e68c7c413e.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 0xb03d7a6da73912f151d78f3945d6bc50daf1dde2d4fb51afb73ec1f1cbb690be. 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/UKBSR2001015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ac85f6c90c5045fa330f86e971b142ba904ad534b73868e893d8bae06ddc2. 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/GBKPL1979212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e0eddb0caaa134c1b2a75d44df1d8bbf999c27ad29955baaac8300dfe30c44. 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/GBKPL1952945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41604496ecd7284a771f6c5d4267fa0eda2ecff9ccd462e92ad99e75e85e8681. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T16:43:48Z), 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/UKBSR2001017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06736dac9ce6de4ee07d284458e8047a0a916512f2159042c99d34d175cf766. 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/UKBSR2001019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce30eab8550c847ada7b2535112fffdd120f07a064215a09e8569e0f74a56f5. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/UKBSR2300227.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9ddd35de44945e992e89a58d2f87db7f18f547c04d08eed0a7da8579c5f7c3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKBSR2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2729653011b2aaa7a87e0a6113a0d98c3c11b805e24a98e0053083c6dfeef391. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBKPL1937827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f229ebd983a7d2e0c1a0ccab84c6c7c1d24212efa86c4ac2d5bd97757cb73. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKBSR2001014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9afe6030e3e023373a56281365a9bed2ad8dbd785a35de7d5638522e253687c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKBSR2001013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215b5736f6f6abffcfe88282f6c5c7e2aa88c242ba1c056ecaf6c80b7e55da08. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKBSR2001016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd196a983666f4dd36e86d7f3cad144ef50fb5fd795680bab86b65cb6dd744. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKBSR2001018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de49bf5871213c4a95f42768221f31fec1ed0e57bd2e9322dbc894e4821c29. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/UKBSR2001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3b19c6105931479162d530953259b1dfc00fefe76ab88732f1a59b7ef8e5bb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/UKBSR2001021.