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 0xaac09290ea1bde9e904072fb07931651bf77fba16c1c47dacbda36e6d59c3ba9. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51657450-98d1-43a3-aba8-da64cfcd914a.json and https://artists.proofprofile.net/proofs/artist/51657450-98d1-43a3-aba8-da64cfcd914a.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 0xcf107a02dcf1bda37a80a3e9e2ffc53fb8ee0cc2152e03d6b50430105882b105. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZDA62553741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a07877b2cec778c29b9d09da86ed48d20bf2cddb5e4167c5fd6fca8f1569b7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA62553742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038327bbae3cbc55690d6340b698285c9b5b67d35eff11d40f2954f58c8b5b8b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA62553743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cf6e0e282bcffdb6d2623a98009ed429c52e9af1221a952ded2f5aa3d00c09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62553744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a600a69feba47ecf06cccac6e93c24fd6fc5a9b6dfa7b3c8c4fdf315e901a23. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA62553745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59038abac3015cc0a71e58843ee8ffc40e92d408bfa3aeb2d5eacd404bfdcf8a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZDA62553746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528db092f8fa5d82b0f4b1744bb4507f01836b6137c936af3ebdedbe8383dd4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA62553747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0d7343f540b45001c83ea01d8c84a9a376dc3fc84468f867792fe7eec54138. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62553748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeec956b1d01112468ebe9befe15e1b4a422668e9aa040dbc82adf3334ac3f3. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZDA62553749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30daa0d7efe9fccf9233ed4505989b2996803ecf5cfdb55029adb37f64d51ab9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZDA62553750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48733c912cda0e21548179063a0114cbc10dc720360b58170ff3bb4fd135714. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62553751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0343db2808705a4c10a22c85b7f948288870ba48ad4c0ff62ce5e0830b2484f4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA62553752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b64e7c8c40c7d2f74b544695bebb58118aeaaa7ebfa1bd4633d0ed846ff40. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62553753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c370a91574f8573dff537e02750df587aa8f387fec20dfe1985bd3895cd1c2b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZDA62553754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caffa6c858fd3c2850cfeed9435da9f825193a6963a78e5e626322065898bd7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA62553755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba8d2f5f73ebd4014dbf44c03030da919a982fc16351c954ae587c65ed8d82. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62553756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95436932ef5829eb9b56360354c3cb17931c1b13ebb00e52aaacc3ce80610ae. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA62553757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef17b112f0a589db3df7f7aceb62498d17aca73e8e802e7dcc58425937dd01f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA62553758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9a5635e61ed68c7bb563bbad36107e2e9dfbef7417ff5e2e544024b56bd91. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA62553759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df67c982cbfc52be1dcc269be683db061f673f258604c378ca40e3306e3f8e6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA62553760.