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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090cbd10580c81230395bd4ec9e0bbe5a9f17d62f2b0cab931fcba38eeca070e. 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/8a9520a5-86a1-4dbf-8697-dbc4ee89b098.json and https://artists.proofprofile.net/proofs/artist/8a9520a5-86a1-4dbf-8697-dbc4ee89b098.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d8a7415b8e8c3f64555dad0253326abe265018dd723e1699b8eee02f0e671. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRV627200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3626ac9d37be3185092a0b1bf5c1981801c7ea8c106f11a61badabb6843a0e3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ087200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ed57c9158d7668dd0fa561354d6d0142e4b0e562014c2f4250b45d5e544dcd. 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/FRZ087201340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964bcef6a02c2d9ffdfadfd7002527117a656290e5c1962fe2f4270cd9fd4cec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ087200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909c6cbf952a30bf61f6328697f252d6bbc474b614781c0f1ec6fba3c84f832. 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/FRZ087200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ea2b0c62e7186a7f839abfc7e9e4f23c4379573086ba700da504d9a4b3e08. 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/FRZ087200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69e62f079896f0bd0c51c0fb92c12d282b2260e9135bd6b134e51c19584d4f. 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/FRZ087200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165ff30cabe81d380f98796a0d1c29b0e88447d73a62566029fb9c2cf15bcde. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ087200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a149a8eda60177979f9cc85a43fdf3fbea1bc4b2ac906b12d5ca8372d35f31. 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/FRZ087201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaeb4341dea687b396ae6a78e613fbac7e39e0906b4a3cd73373a0fd408838f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ087201360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b838c22484f67c83051185feb85221fb9ff6a1f77fcc1b91ef3a2aed428ad8. 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/FRZ087200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d8a7415b8e8c3f64555dad0253326abe265018dd723e1699b8eee02f0e671. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRV627200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909c6cbf952a30bf61f6328697f252d6bbc474b614781c0f1ec6fba3c84f832. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ087200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b838c22484f67c83051185feb85221fb9ff6a1f77fcc1b91ef3a2aed428ad8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ087200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ea2b0c62e7186a7f839abfc7e9e4f23c4379573086ba700da504d9a4b3e08. 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/FRZ087200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3626ac9d37be3185092a0b1bf5c1981801c7ea8c106f11a61badabb6843a0e3c. 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/FRZ087200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3626ac9d37be3185092a0b1bf5c1981801c7ea8c106f11a61badabb6843a0e3c. 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/FRZ087200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909c6cbf952a30bf61f6328697f252d6bbc474b614781c0f1ec6fba3c84f832. 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/FRZ087200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69e62f079896f0bd0c51c0fb92c12d282b2260e9135bd6b134e51c19584d4f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ087200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165ff30cabe81d380f98796a0d1c29b0e88447d73a62566029fb9c2cf15bcde. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ087200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b838c22484f67c83051185feb85221fb9ff6a1f77fcc1b91ef3a2aed428ad8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ087200600.