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 0x5af80499c5e7e31576e14d548ac8b1e36ffbba553028317dfdf821b349604f03. 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/b866359c-783c-49c8-ae0b-521881458762.json and https://artists.proofprofile.net/proofs/artist/b866359c-783c-49c8-ae0b-521881458762.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 0xaf3426ed3851eb1761c6e51ccdae4aaa548db48a31c3ba04b5f7a15ea92ed928. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/UKXN22526724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a54c6f63db0c1c8d65033b353799f6a01d6036254ff99cf5aa6c5827dbd25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKXN22526728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1b6e7c8bf73b856175b9bb2fe772dc59704cb2c9746431cb86debb2502e4c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/UKXN22526725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2846fef425cfaabab1917924e4eec102bca2064f89df133787aa845feea8305. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/UKXN22526726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85375e17721af1fb79a2cdda387fe4d16561f24971caea4fa477867aa37a8acb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKXN22526727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ecae14e20c47f881baf1ab08ee114658be6eb121781c3dd7e6ca002bf17f27. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKXN22526729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdc004a809a106fc67b548a1bf85204a330bed671bd309c86008d7765e973c9. 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/UKXN22526730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f83b4a0d04685af1553cfe1d40845cb2eb7290c2d649bf7ef0ed8abdc763d1. 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/UKXN22526731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90325dd1d5525af6b4373c9a4a33695bc85308cb9711cb056b12e92bc3c7caae. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKXN22526732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405fefee79c4ffb70af0bb749b198113b295dcf5834c8b29ce8cc0c40105c1ec. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/UKXN22526733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580d729c3559573ed4ce6a7f852fa5722163150b3ecb962129e2252af397a69. 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/UKXN22555517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112443a4224e09542cd552142ffc1152950281bec2629dcf07cd65f89147a790. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKXN22552525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c485a71ebe9314f8fb6bad7f17dedca73a27f55fdcab283d59736257974f43. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKXN22570944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c3e104df17a0e0bae878b6d04084cbdc1297fe4b7174c26b4b2c0d78319b56. 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/UKXN22556819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dfe76d16df2eede70881c1acf56e795680431c597450fd8fec0ed94bc265c9. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GX3Q92504847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d858563ac19241b3d5b61a84fc9e875330f110348d75bad43ce38b16e2d0e. 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/UKXN22577083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51c087bba03128d1b77c677d1444dbce7cea1ea67444de6d166be4b7d388c9d. 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/UKXN22574828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05eb3098a15a535c5df403a14e4d5aae450e2bc31ccc72eecf8e53a27aac5b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22578074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0a77bd2fa244823fea6855c17b72dfdf56fb552831ebf1f2bcf50b437b743. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UKXN22596474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d635e667b15202a33153d8c88290a6033172c67694d02288faf27409f09a2fb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXH2J2586509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403465fba180c54661699e7a1859046a3047a2b5d6d5900390b0e3fb0fb87dc0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXH2J2586507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb22c7412c8db571956aa9e132b87ae69aa26a30ecc6bab5ba36791b10956e3b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXH2J2586508.