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 0x57bb37cc6b29e0f174103a74ffb421c025ed34ca5016b27f6ceedd2bb20167f5. 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/d4087117-108d-4990-91bb-142c793fcfad.json and https://artists.proofprofile.net/proofs/artist/d4087117-108d-4990-91bb-142c793fcfad.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 0xa61d7597230d80b17c29bc38f7deb4a2e7f9bdb3a0ba26bfcae65fe867624b00. 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/GBSMU4227091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c060a2951d55bb14e7bacc9d67fee236a7ec389493cfe932946dd6d8d5d236. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBSMU4227094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d0e0922fac9a36007ee09cd70430ec3c2085bf5a2148f666655f0979ebce5b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBSMU4227099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29db2935fa2d02f1c42ffe3261f269f7a8e862413c4e10a932ca775007f7129d. 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/GBSMU4226445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6a2887d827e751e781674b9f4c0497da8b84c8e6b26b873dcdd53d63515cfc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBSMU4226448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eb296a2c1536f81fa52517cf0918f3e7fc3ef4a9517919029c10dda6699f11. 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/GBSMU4226455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1681915389c0fe66c7d84ac7ffe77517e8343122a25d0bba32408ab52ed234cf. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBSMU4226458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddc3edc837f5815a504904d80e06643be5b4159c3e4abd8cdbb01d6e3a87802. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBSMU4449004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e9f5b5e0324e55667706558252bcf8363c26a3c58a131902395e9e016804e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBSMU4449006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b57f730f92e41b0a940c3d738ad780f889dcbec821a3d3ba5c4cd24bac2d403. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBSMU4449007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb117305894679043f620e9bcc2736085e8a276864f470d503e55ce32a84948c6. 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/GBSMU4449009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe005f04bd3800c32961221c884560e3bca3b3da74064b7b6c8096c41d1a4c4ee. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBSMU4449010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1961ed1655de8f99bffffe16501dfc474ed9492c45e2e7b39999e6838e382c33. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU4449012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706ae9233a97281a1cac7672b7dc02bc08c91d7c0daa2d130ab42f68e1e97a4. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBSMU4449014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a1fd955033432f22797594479e6a9865a70f5fe39334317e5f20c9f6466a23. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBSMU4449016.