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 0xfc864ae0af8d7be2bc8c9d3d4694da8a7cdb1e0822c61a3ba46158833a0bba26. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97439da9-9600-4a4b-94c2-c3b29469e82a.json and https://artists.proofprofile.net/proofs/artist/97439da9-9600-4a4b-94c2-c3b29469e82a.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 0x2daf6025dd514232860f3c24e9c20d91272dd15e40fa28beb660382de970eb42. 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/ITQ002400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2eef43f3aeaad8f33742dac1103ea505bb7c6b902f5db07eabf7986f8d8ef1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITQ002400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6626a85f54f832e86e89bcdc0510f69181afe2187510a2b8ba86c4488fe8c4e. 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/ITQ002400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707d33e2f8c9fd31ffe2352d58aba11c59d29de6b206a2f5773e1ae886f8d27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITQ002400491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d638d9e10654d9e6350ec055dce84a0028742777be0c473797dda2760d9ebf8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITQ002400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a54f2109ec54a27c2399a6738b14dd704a86efe3f36c6f457ec78100f5e632. 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/ITQ002400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6626a85f54f832e86e89bcdc0510f69181afe2187510a2b8ba86c4488fe8c4e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITQ002400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9c45285529350d3a62a21e2a1f95864ddc45a53dc164cbe07cce4b24a69613. 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/ITQ002400948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ac7e3fe781d414f79fb68734f85e7deccce3435d1708b828c750c2491c87b. 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/ITQ002400949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbba0c793eec69ab676d96cbbd12b807b126505d2c21547843abdd0c28b021b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITQ002400950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707d33e2f8c9fd31ffe2352d58aba11c59d29de6b206a2f5773e1ae886f8d27. 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/ITQ002400491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2eef43f3aeaad8f33742dac1103ea505bb7c6b902f5db07eabf7986f8d8ef1. 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/ITQ002400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf6025dd514232860f3c24e9c20d91272dd15e40fa28beb660382de970eb42. 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/ITQ002400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6626a85f54f832e86e89bcdc0510f69181afe2187510a2b8ba86c4488fe8c4e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ITQ002400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ac7e3fe781d414f79fb68734f85e7deccce3435d1708b828c750c2491c87b. 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/ITQ002400949.