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 0xd44020a9fc85438c59ac4deeb07f815260a8368dc92b94538048fc0110ae841c. 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/fedf5900-4dac-4a09-a7a3-c1026d8068d6.json and https://artists.proofprofile.net/proofs/artist/fedf5900-4dac-4a09-a7a3-c1026d8068d6.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 0x60b0632ccc5adcee9163c40169aa8def59dcc19b1388435ee1a8fa4deb066861. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2224714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12209cd1cf14f95f4f0e21e0dcdc7ad653059fb52c26f974d95d69f4be27ba48. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZMEQ2224717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3198eb98b648ed1bb0886094b89e4b2e3da97fbf18087ead6ce1a162a0569b70. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWT2478985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee9d1b75927c3c2186f1a9b1b26715e1d1fbdb0203e378157e1b9963b3a891. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZNWT2478987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6facc22540919c58996de31ff3bad1813bcc80d0f9509bf7bdf80910a9223c. 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/QZPLS2474072.
Cosmic Invasion (Instrumental Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562b6ec52e82eceaa8cd5f645c8eeb4756bdcbee552f3ae02aa0bf1118374eed. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTBF2437032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c701a399b2003022b41ec3e802cbe276dc3753797cbb3591681c3d6cd22c3f. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZTBF2437035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba45816cf96be980b2cfa12f87fed11d693c61d2f762ab70e65d7ed586fc1c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZZ7U2421925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765301c8b121f417173682438abec8ca5768ee28097ffb0cfc5a1c8888be2db8. 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/QZZ7U2421926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527dba93a00487b74b615610c22646d98a7d6d59abf898773c9b6ddee5db4ec7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZZ7U2421929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e657b8b6d36a3ff969b862ffecbccf0bdf14e27b6616379ecc60c15b6d4c1. 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/QZZ7U2421930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cd2cbd8063c888d8e5161b9a8851ae68361e4a087552a036810b9e7c31d1b9. 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/QZZ7U2421931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cfff6534e325ae65d05d0158ce00b47f417e75a0eeb89476263109ad80d965. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA62576538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b30bde576161c331dce4081622b15e6984aed864ab08e3929c821880351ccf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMZ92540428.