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 0xd977c7da23d49c6344ff69fb9f1a476f1c96da4a76ffa6986c5ec997a458dd30. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/851ad0b4-c20c-4c26-944c-4192d1c454cb.json and https://artists.proofprofile.net/proofs/artist/851ad0b4-c20c-4c26-944c-4192d1c454cb.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 0x0c6e3af855352f5ddb52228d84ec3eca9ba878026af93a4d1aca42468773f9e5. 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/TCAEC1944498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3127b713b99a248f3744cebe19c69a98ccbcdcd34810f981fbdf79fc173646e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:46Z), 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/TCAEC1944547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e447ee6976dcb7a382fb72ef42a5655ae6653c02b94d7bb0e39e3184e3b2a7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAEC1944563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7097e10675ab6801d2ac41ab8fde354ce76848d799019ac26b56f19df52ef2d0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:42Z), 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/TCAEC1944599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb79a85d920e8daf0eaa8fbb0fe7e93cec700752df12fb7c32cd394e5ad36c1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEC1944611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845f9708107f55d786f2b44437af94dbeac3e36bffa8f030389a21cf0b10502. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAEC1944617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f098aba6bf60ffcbdb79eecb22e9bce33af8e83cb291b771d13debdb89f1ae. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAEC1944622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d6f89d6eebd2d59919efe0636c695edb393ee906109fdf6ccac621d0dbafa2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEC1944625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9f3376f3e4ec255af2ea8e262813f8a3f0aa02e41743575b0085e6dc4aaa8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAEC1944632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc736e19c17397c5ef980a6d11da68ac280ef76101ed33d775beda4a6e71a1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:56Z), 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/TCAEC1944682.