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 0xacee605b8267b3cfd3b50b3d81b9ff7d1ad65d54b89cbfd588309dc99aa8f8f7. 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/7d2259f8-119b-4607-b998-d267c2f00445.json and https://artists.proofprofile.net/proofs/artist/7d2259f8-119b-4607-b998-d267c2f00445.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 0x3ed72f9f16a8d142c2bcbfbbb3bdf2bf9ace831df4f94c7485fc968666bc4a6d. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZSX52100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859df32546b56b162391ff4677f68b53f7b06304b75fbab0a6df1477eda5eecc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZFFG2000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5970573f032672cbd6d6bebd0739b3a58c84a5cb2aeaa4b7bde6fb109eaa289c. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZFFG2000703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2abbc1f5a151b75458219e067fb9a2659a2dc8d79359b8c0119215ab93c4ba5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFFG2004502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81ffc1985a67cb6d6d1d1742d341fa7ef37747be93673f9eff9974e6e86c17. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFFG2004504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f50736fcdbb8b558bacb3cc79ea35aa4f91381b9ca2ff2ff11df476ec01211. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFFG2004505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ba9816c0c1d7ee7e6530e101777a3c710384123dae22acbfd81e4b318d2a5d. 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/US83Z2127763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948cba5a05c6c01020a85ce2f2d35a90cbbc4c5b0ba8f6053f9db56d23747480. 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/QZSX52100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b62af8f2c06de54c2fd5d503714ed50668af87b9a74807dcd7ad9737cc9609e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52544466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6511645815c7f778be729f736fcb90943821a7660bc4885b7a621ba8ddca9f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:12Z), 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/QZHNC2508441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd28ab9ac7eba172dab13090bf67f30174ddd33ce39e102423c7f8b1c9c72a5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHNC2508442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a40617933491eab634eed9de538e8644fc76413a3526178fa1b421e1add54c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USHM22515448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d61b214b138b4efb5d94efa0eb57246aed41787bd393ed6725850f08db04f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:30Z), 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/USHM22515449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a65b386ed5a84a5826dd3a60b36686c8a524b502896df64179e5cf57269c16. 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/USHM22515450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de6a7ee222ca9c77c929dfd5fb43247ba9683e889a3e54445d3519311c1ca5f. 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/USHM22515451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500cdbc97c114f8a5059501d04865fc971175b2c82ab5c6740a86b32a91f52a1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USHM22515452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5c701334dbbdd4d545eabebf9b0530ea50585592fe72c6113d3f4a0a07a3b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFFG2105604.