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 0xc1eec3bcd11e5d6c3aa3e546e225e6481fa92c02cbf648234d63df425d89fa76. 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/ed5c2396-e417-4a7c-bcf7-2430668020f8.json and https://artists.proofprofile.net/proofs/artist/ed5c2396-e417-4a7c-bcf7-2430668020f8.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 0x660d1fe22174e7607ed2b39779531609aca64f06f90704b41237d9f266dfc72d. 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/GBAHS2001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb802b767c05fb097ee0c2f9caeb772a260550979d27a3b6831d3dde587653. 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/QZNJX2432522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc82039f1fd4b8a8e6a74dd263765424a303947fba7a27c428fd01b6372e6b31. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92421785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2088c91116fb627f78e8a865c74abd4fdc0b3be805defec4e73ca25be6c0e8b1. 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/UKXN22344619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063d9f36833995d32aaf8967c28ab7ca7ca7e687f724b147610a55cf1e72cbc3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP2326490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed425b5f98eb1edd719f526d6cc8137711190d0e02b5b0e73ad24946d463bb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2326489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63233a7d05ab8f0db1ab0fd4284941e5a33a2fbbbdaf6b1aca63523a3d001ee. 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/GX3Q92344962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845584d2e43cd768dee26c8c59609eeca6ab2fb5e3b7d25d6cb23e413af052a0. 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/UKXN22216094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196db55a8187e2484d63548492f5e47583ec7e51d39668783232a33091bc6fe8. 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/GBAHS2101491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4bb5ad907882f117a1c1df0937b081ddc15b200e1f1ad91f96bfb737a2a6c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBAHS2100779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23735c3e3b4026bf8588c29a26190d728a7fdb3ba9c70a27a9dc12818a0bbc19. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAHS2100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df984fdcc3edde93afc4c6ff8cd876dced6c08b3eb5a67d270bdf5a6b257f25. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBAHS2100777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42217555766d3c69d46fa40de7c0386f5def75373d7b6b398c57b78bf01e74e3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAHS2100778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660d1fe22174e7607ed2b39779531609aca64f06f90704b41237d9f266dfc72d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAHS2001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016eaa486f5fcb5158c1a853e4a9c887060efe8d8ed19dcca7bc26834a42bc1. 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/GBAHS2100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23735c3e3b4026bf8588c29a26190d728a7fdb3ba9c70a27a9dc12818a0bbc19. 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/GBAHS2100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628af42f7f8c4c25c7db58e3ebafb632879a4091ef849c95ab8fb1da3e4be23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSXS2000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb12d6896dd4b016eb503c1e7d19faf5bfc84ab89e1a5a258e2b62258802547. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAHS2000237.