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 0x2a40768c95be751626d56634f2ee23b9c6633ee3d3ae08c2e19dba5c857262ca. 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/dee6b6c4-9b8d-44f3-b7d2-a205c06372e2.json and https://artists.proofprofile.net/proofs/artist/dee6b6c4-9b8d-44f3-b7d2-a205c06372e2.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 0xc0ba7d483179d14a9b728f4655bc57c01cb5bac5497d798804d649f610f6062b. 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/FR10S2178121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d2536cd0501a6c99f5320953718d7c23639f77dba2c7cad965b6e28df7ea2d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2178122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb52c98c97310a2dc30c20ed08fa28fcd18c568cbcd62f97a909b96bffc1354. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR10S2178124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8ddc1e1317bd33b11f4866f1c325e59d41549c0cacf5189e60a5fcaebb2913. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FRX762333110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f64a5554827b5feb51b8a1b15103c62593065b89ecf277ae051ef4d1b4ab0d. 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/FRX762333112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b5512405a1d5640d7a039def06baeb31eef0b368b4dc87311eabcfde91d686. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRX762333111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7c7c3a5c7cfb1402f248fe70a45a649afe9cfb85c811760defb9ea7d89d6ac. 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/FRX762333103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a42c7132853c0e91d8ce49994ce3c63c8485c59b203a596afa903cff8c748e3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX762374752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec103589176bff60f3867f64fdfef59932cb5bc62101a3a34292782bf5f50d3. 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/PLI364147270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae36e5ec39581c40412aee1e6af2f6f4c03ecabc6a5aee43f10d59dfffe489. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLI361039451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbe51d211e3955b43801e67291fb9b13824b1292878f8fc390f3cc8890497f7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLI360937761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8280cf0954a5816542c6b5d0899ce6a83f596782205e86741998e39854f13f. 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/PLI361015880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf592fe566de6bae7734e976764c4f780b132bbac7dae4f032b67c1c71f905dd0. 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/PLI360937401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014b1a5a062ce64cc4c6358835ae7d69f29853cb7635ba302920b05ccb5ab522. 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/PLI360936361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b4f1b4c5b9375ed15c06437874e56aadffa6ab436415c01993200d69de9a5d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/PLI361038060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54b3b35f81803fea4e249a4532e3489a1c67153a4f41ce4d5a1d8cde5ffacdd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLI360985910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346eadba493a962dc1b7c16cf5f9dc100e2707782ef475040341b4441dfa8018. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PLI361015521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280abe106ce2707b26adfc078a110a91b601e3984dd930d501c62f5b6a103243. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/PLI367006330.