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 0xbe4b0e780446444a803d26df90f8b5f752a46c13162d598592c1bab9bc91267b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb3ddd7e-f330-4edd-8f96-b1119ec6e64d.json and https://artists.proofprofile.net/proofs/artist/cb3ddd7e-f330-4edd-8f96-b1119ec6e64d.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 0xac9ce8305cbd03032bc73029f100a8c5a5dfa2f4afdac96dcc30c950ee6a3fa8. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QMDA71844333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159f6b7ce8f98f017607fe298826828851b14941a437967a7af5113c3fc76b9f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMDA71844334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110ee0a0304611c3d11f0f7c12acebd842c5bb29ccbbdbd6168c0d933bb54d6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMDA71844335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d69df3b1a0eb124aef1da74b62f1efda93d89cd6dec7e9f94f089478c3dda. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMDA71844336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fe17fa863427d69fed468ec007380ce863a7fcdd0c06b7e6cf8228b889f503. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMDA71844337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab364db5776fbba6e497eadf316273399af2f404849395fff7e50b9b17cc107. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:46:31Z), 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/QMDA71844338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba161dc54c040c1feb46fc0d9e13a99e9250ceb00fc1557c2bcf0d603299a3. 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/QMDA71844339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4555f52bd68cf846dc62a3b6a41ac196136db443096dceabf6d4cf43f5cb11c0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QMDA71844341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ea068656b078a7f23438bead9e41ecc133cfc8c5b783b8247b3d7bff11e3d. 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/QMDA71846473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268743e2d96f82350139a2c32080d5f684b6ea4018a4f310b721ac2ef1a1ccd9. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QMDA71846474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4264c12404c7797c482b63700cfe2d2d4cc8332f78f9679f5a2a1082ccf83ada. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMDA71846475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd2e3defb19197e71d5151f2407c493f564d1bbe95b7ec2115e8ed61091475. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:19:27Z), 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/QMDA71846476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee86c97d5e150f5e9044a33f920b33a376d934016520cdbf309aef6b3b18da8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QMDA71846477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c08cce4193ae1126c7a0faed27e9aa171ae30fa503f9a48d4c85c788f990f. 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/QMDA71846478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad8238d51e55794eb29dd07b7467ce8982c52789efc12ded8a4ef2309dfdd8. 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/QMDA71846479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ccedf7fbd0f4ce752c215abe5b8cfc217b0d731482b22a284c73d81686108. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMDA71846480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489450c37a9f77da5b6470ab2a85e1f0846f517e221ec7d2d7735f2b04a5fb78. 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/QMDA71846482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a3cf4850b25839ea4c2018936a1377d125e0bab58a3a35387808257cc1944. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:57Z), 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/QMDA71846483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61345e62aa390266cda9f7b4bf15cd6709622d0e390da4e8f0006e9e875ed0b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:03Z), 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/QMDA71846484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e775a189cb5b9a2e5077db427135237a4de6bf7851caf16cee6e82d85b599de. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMDA71846485.