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 0x120cd9d62905a7de7bfff1fe2f3eb8603868dab51c2f43cc1d9e95745e9b18c0. 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/9f40ab4b-ea32-43dd-bbee-63ab994ac83c.json and https://artists.proofprofile.net/proofs/artist/9f40ab4b-ea32-43dd-bbee-63ab994ac83c.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 0xc2f30ed2e390d3e68160da5e9fda80741dac312d70f0c83833d684eb2726aae6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBFFM1710704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97d08b2a657314191164727c0028e65eb60500b4efe3a50fd40bb1caf42c23. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBFFM1710705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d62dd5a44326f46e4aa61904dcd6e0fcb77c3b3766704bc6e4166994cba6fa4. 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/GBFFM1812102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e277ff544a5fa502d507afe1aa15d6b1509abb26e6d031e223932ec89867c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBFFM1909054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23ab72fc426924f88434387383ddf2130ff7e7f12018a111a61372d61524c4b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBFFM1917728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fbc7fe253e454ba16027e7dcad586559f79083a6719eeaf7891276ae0afd3b. 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/GBFFM1917731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c367487081adfe0494a238d1d475225b215cbed7ce1b6ce23bb0442d23493. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBFFM2140966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62fcf740fa129c1c71c1f8fdc2ee0a5e6e25d5b72e1f0b53e20f739a348dbcc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:31:48Z), 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/GBFFM2028515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e3e7d675c2e8b978aea1ace150a2b48e0e232ed62c259a4acc16fe19ecd8d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBFFM2028517.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63339dd976ec7ba5d46d2927bddc29b798c0b4a967c89e3d6238328b7854d592. 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/GBFFM2024229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecd01eeeb27a4ff8c7103b2c73c72b2f5e17965c3178b72e088aaf8c4e3dcf8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBFFM2024223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9040e6e8de775c4851f3932ede817659625e1e616dc3a1d3d1aee6847f798384. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBFFM2371408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664b6c28aa571448ffcc354a97c2992b55876b21c21079d1d0c43a1e600ff22a. 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/GBFFM2371910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85e1bc1d408006dff043885492ee46306f5fa0cda8cfd8dc16837427b181110. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBFFM2400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad00e498ed4f9774555971480c628a87eeb0eefd1b4e52fcb1d873bd40f31c44. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBFFM2426730.