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 0x4f34ec1bf9260c3008952f86672f327905707a36793255b2acaf0ad478bf002a. 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/e0232875-be69-4b6d-b9a8-39fd7eaeeb96.json and https://artists.proofprofile.net/proofs/artist/e0232875-be69-4b6d-b9a8-39fd7eaeeb96.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 0xcd3a4f97c3f47cce746e6e6b3c525bca21b562ff243ce37381848c004ad2d5ea. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BEEN92211101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ed41b95059defcae7f55c78bbf9f44edc8b5b237e7c08e2903c3de80c8ae1. 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/BEEN92211102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747642c025911eb667739112f535f2d6b9afc31ad2c8d3c26d342f04c0bf9440. 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/BEEN92211104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ef5928174d72352beb085795cfb5dd4b90ed22059526a8f9087af3c02c0af0. 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/BEEN92211107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1c1a3f28d40eebd34d7104a02d83bb146be4d71102fdcc0e38e1c16cd6dab. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/BEEN92211118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd672ffe31b09dc382b4bdba4f636e483654fd1bf7f707c6edb0331fce56bc2. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/BEEN91620005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32fba26da522a168403208b852a2155e574977dfad78627a23592a1a50bda61. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BEEN91620007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049beb6c3214e29bd0dadb254d1c4687a3afe15f6f23a022f1764985a08d62e3. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/BEEN91620008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0848071bf9ff64a422477cf549709b8e0403d754b0a37752811b6a404e8451. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR10S1802177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fffa26f97fce76989dac5149b558b1619cadd7854323d7bfe8605b5dd7f4f40. 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/BEEN91820001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2919e21288b89a3ad8201704a5e0bb70674eb7ea6bdf56104ad1d6af4de1f45. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/BEEN91820008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1e3a65df6a9f2eb8f2639a4492537f425c96295dca4cae2b88265a68474844. 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/BEEN91820009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac359fd00fcf0c6937f485d78fac8793730a8a459124f0ef364190e4dc3634. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BEEN91820012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4e69f39ec37a7255ef6c60ac88ed5d01f38e95f80271a723378f319e8545f0. 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/BEEN92100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06666dd04346f7718529abe5e025506ced983217635d5551976bb4df8eab8e8. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/BEEN92100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a50ec592cb07ca964eb3f5f4f54a3f67ec5d6f00fb3634455a77608a12faff. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BEEN92100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90797ae695fee603d375d30f562fad5ef576ce9d7fc0ae0baa9cab53fc036e9f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BEEN92100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f6698f2b63130c09019031076045d0b03c7719e90f13eb3c1f8aa9889bfe95. 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/BEEN92100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c52e9c02b613f0c0ec94ef182172130314be94c1028a1a7ad38a6077dd00e98. 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/BEEN92100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a10c201a7453348574d791002d26a97fdc299eb8a832657e8c853b288aceff. 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/BEEN92100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3470a9e1f6c3b87b237e4321043b46d9e1947ef89a4e8e9d0b35d004139371cc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BEEN92100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bd6f1e1d7a7fae5f22dcbb5d93b6fe63f6ee5ba223ff9ff8d69f3ad507b53d. 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/BEEN92100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa865b7338b7a6388627cce4d2c6fb795c74215ed0978e88bc45486464793f094. 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/FR9W11919257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0848071bf9ff64a422477cf549709b8e0403d754b0a37752811b6a404e8451. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR10S1802177.