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 0xe73efc6ad10e33650754f2cb60b7db3e03091a8af60341754a703c64b58096a5. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b946685a-82fd-49ac-9d01-a56f559c14bb.json and https://artists.proofprofile.net/proofs/artist/b946685a-82fd-49ac-9d01-a56f559c14bb.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 0x946faf6de80291000ed6e219c0eacdf2e8f32baf2290c5efe73a7b88dc8e894b. 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/QZMEQ2447062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250ba5afced457a3662498819e78950982b40b1db0e60b01651a0dac4943700f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFJ2420160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa7f396f443324b92785f6a7ffcb1eb60c6d836242c96774d3d65cf52ab987a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZPYN2558479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb379571b3b555940131f6d8be1dc32544ad11ff2cf4cafb00423d600814478cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPYN2565773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb730e2baecfdb1f68ebd1506ab1b95edd5763e88b3518b8b6483ad0281aa54f8. 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/QZPYN2569856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72f667c68a289bacd5cbef32c85e90ef5e9d1913c87f1a6593ee2f7443e46a. 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/QZPYN2570204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10bb13572909b953fb825402acb508c01f0c589c5db055cbe43dbe3e3e8d73. 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/QZPYN2510300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244852861b51eeb92c60a9814ce818d40a5ec356d3b5cde62c25fad726f492b6. 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/QZTBF2518030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24db1c61101c724619703c814c8e5a4ded224d460ea67319146b85373bfc76. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZWFH2539058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f44f4ed5f15d5bb3c0969f5557010b3657ebb63deb33a7bcd091f04a1ea9f54. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZPYN2513442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dff6dedd547a3863f59b696d1a347c5937984c6f7eb3978b3c763e694497879. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZPYN2514218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74cb92914dd02c34fd7ae55fbf1d72423bf39cbb2826f776fbda7322e6eaaa6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZPYN2516868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f406ef8fa0fa3c0add391e1688130233f5d8cc2eef6ec97887cdf0179b8c19. 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/QZPYN2519554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd3595d35bf312e976a6b4e8265bae08da31b3e7379274611a788b0611f06d7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPYN2521750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abd6bc022b326ef2fa2f39ad1ec237371f98adbfdab085bc6cabc2c9cf07928. 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/QZPYN2523307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952cfb55f1b9e71e1dbd2da82fe3241474eb1255884014e6a7a41303dffd52b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPYN2523649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee892a2ef691e4c5a6175341e484bd0e6d5c909cec70df30923e15365a27f9d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZPYN2524601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7baf08423878529d62d5240a1be250c0cd39c824bfe0fa4df89561956db5e8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZPYN2527459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa118152bc73d1d278e5bec742d920e8287c4a45b66afe4c70e636dc174641a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPYN2529007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da5c46e15ce7b040afc399608989b5b7fd1b44f85f988af3daa356e5522d439. 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/QZNW72414410.