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 0xc58875c959abe541b14a2be5a4f10b3fbc76f1094eeae6d8c5257a1bd35e223e. 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/daa8d2a7-a62f-4af9-8762-fda49d92465f.json and https://artists.proofprofile.net/proofs/artist/daa8d2a7-a62f-4af9-8762-fda49d92465f.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 0xe93fe0681c4daaf26b17a012a0420716d58f78efff1707c5e8e474a2d44d7e6b. 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/GBKPL2016035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9edb13cbf0863e11608630a5b161f10e9f2b249165c2d3bed88e7d80da36d. 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/QZMHM2083923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778c404bfce1e2272b47d4c849a2716c7bb056dc350d73b1d36d9d8cf5c6735. 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/GBKPL2140379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5373c44fd17941d803559fa8d715081f6f87ffa42fda9ede465a1876ec1490b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBKPL2144738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5147f9e1952e1b250e447c3c92202c67927982d616e7393d9207fe38636343. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:44Z), 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/GBKPL2174757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875146ed67fd8bd688af10a184c2b63d2ec186129d57406a621787da968156d3. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZES92332035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56ee96c87fa9b6c8d652950cccfe3002fa54d541b158079a238bbcdad615f9. 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/QZWFJ2342984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649c15dbf4708476a158dad4d1c23a0f7de1a639a984a069f608079df752f1c8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:29:49Z), 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/QZHN42400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacfacb6612f27c6b7288383099114cc921fd468922f520899f817f4624f0fff. 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/QZHNB2427814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82593d549dc2039fb1d76d774e6f9125c4b86cb247a9744e2adfae6b5f743aa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTGW2400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a09901409e68e81f6b9d14e930462b9dca0aa13856dd108c2a3c9cda8c64bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTGW2405746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b0381a992297424aea56a57f8cb90230c3eff8ec6ba16da02ef390183a3a6e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTGW2405857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6f0a6bee47f367b9cd3c8e3d33eb35f878de1e56ffd72183885064a5495c9c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTGW2406897.