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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c57678e732d20dcd1031218b509f757641a45f5ec8e06ce8b359a0a32a756d. 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/98748072-6403-40d7-a8f3-95f7031bef4a.json and https://artists.proofprofile.net/proofs/artist/98748072-6403-40d7-a8f3-95f7031bef4a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6466d476569b24c13a158f93dca42710305c5a3751ab5dae0712305154677f06. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USL4Q2014740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b08ab52aec9d4cc4518ac9838749c0ecde3c621ac828fd56dcd73ee4037ef6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:21:13Z), 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/USL4Q2014742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9d994dde19477bb84fcd9a887e2c30a0033408b91d1f345638a1e1ccb4050b. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/USL4Q2014743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff35796dc180e5ace6071084b86333d7441665f69f09b8d9a0343ca77d69997. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USL4Q2014744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132ffc681e8cb093a54e76647049c023f6795aa876d9293bb6a0c8c94ee04a0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:07Z), 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/USL4Q2014745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad2f55189d04db382a240ba67a3edcdadcb159c6a93a3e2bed7c04eb98c5b13. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USL4Q2014746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61f660c9f67d80db07d553533444131097e363860df7074d1a46f4f8eb401b9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:29Z), 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/USL4Q2014747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0c64fdeda4e72daaf545cf3a56c5d20c7a94bf586ddace27210f2d6687ee8d. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USL4Q2014748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27964096d6af497f69005288a72920a092c601b96247140d102fd52a508a404b. 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/USL4Q2014749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760425376133d43882dc6589af987cf8b82be85183fd9865f9d66dfa6367b1bd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:16Z), 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/USL4Q2014751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513483998ad156360316792b5f34571c3bf346327a660e4a1e80cf3589e0fa51. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4Q2032849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2af40c0e0c24723daed737ba3805f441a873d73c92c507cb6ff4be1b1d78dd2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q2032853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fe3cfe953a833eafafe4309ab9558034eceaaeb2ef5f3fe309b076581e7844. 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/USL4Q2032854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a85e38928d9103bd5b2cdc2ad0f38bc5960673e83eedfa4becd5b3cfe0da176. 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/USL4Q2032858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2111c9fbf3029ef3c85b6db9cd8be136774d1b9576e6f971aa757473c36e7b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4Q2198312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22176cfde26d816e3858c9dba36f4c4a85439f180b7f78ea401b78cfcbb46603. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USL4Q2198314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbde5cf04d477d89897af0e35f0dd180020d2db37cdb4768bd11af145bb5a3b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:07:39Z), 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/USL4Q2198317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f764dfd6c69164d03284036a1104029b35c0adec22b8a123985a4f0061e1468. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USL4Q2198318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78c0c309bc08287e83a16de767944e4e5bd86f933f6a6f12dfc1374f368ddbe. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USL4Q2198322.