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 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 0xd61f4c7a41ff7fe8dadd2a10be48aba80d5e5aa4183ab0540b4174074c887e6a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee711df-096c-44e4-9a48-14d043382ccc.json and https://artists.proofprofile.net/proofs/artist/2ee711df-096c-44e4-9a48-14d043382ccc.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 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 0x82e3b88e830e69b7fa3278cb6cb20bdfc73075493dac7838b3c8da07782630f0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU2294172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c3f79631ce9426b0b8cd5b5f762e66907529679164589868f029673f4e1f8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBSMU2294174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d6da91addf23127be8ae3e2fdcce46696192a2a6494c42ab9acda3f1aa594d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBSMU2294175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe46756a107d05befe1c609a56212f5b31c4227097e2a568a3309a7e58a5380e. 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/GBSMU2294178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81016c6a84b342a85e09850d7d3fa7dcbd495f5b8b0071954acadd2d37ceb705. 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/GBSMU2294179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4523a8af88114deb6fad48e7f783aea54b3a73c6f56b0a47c48726b902d75b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:16Z), 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/GBSMU2294180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb161aa6ae0d86d48b6900437047562684729cba4e596f191a15da92248cd9. 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/GBSMU2294227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4eeacf4cdd4c6adca75742c502d98a678da4ee2898d65aa4fa38eabb2143a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:24:28Z), 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/GBSMU2294230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3cf66b8c44dff247dbe477757db6d2b791f56566f4b2c788e2fb4d03152034. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBSMU2294234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5121c016f968423d9e138ceb0ebf505abf7b43fb5927d5d319c7afd2f9762c09. 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/GBSMU2294236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d825c503f0e15a704fb08cdc85127be52bbbb43ad028783cc8a3bc3c5ece769. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBSMU2294237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa195f7ab739277e6774e2f1eebfed6bb4eb47e9992b3a075adb8f041de33d2a4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:27:42Z), 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/GBSMU2294140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5161161f93e8ad2b4a54f964860e5aa4b5986b81ac919506c441c36c81996c98. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/GBSMU2294141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e8d10639906f3f0b1dae740a90be39bf2579fab678ccd206c89e6274c6d21. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:32:55Z), 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/GBSMU2294146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040151226e9f31599a05c06a2d15f1c324ae16a5bbd6a679cdb53778bb54488b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBSMU3535730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0454faac693290ccc9c68c4c5e90294ea3dee33ce9bd68c1b556aa55d1e80e92. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/LVL151901114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d2a4ba94fcdbe48eeae1846f8c6c7f2f679fef34117936a4645a1d6960b89d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:04Z), 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/GX38U2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f160690b6e1dd18c9872c4557465de418eb6b927c02f289bb397dc738d7e9b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GX8KD2495786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490e9558fcc8b1b30bf288260cc3af2b8c1bb25824ac5eb51d0431c9a451b412. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/GX8KD2447583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6595b8dea4d41d1aa93234a49848169a785731910334e316d0764c97e5035f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX8KD2437902.