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 0xe03b36dccb7d46cf392e1616e70f4d459df0f5ab3f400dba16baf41a226b7e03. 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/174f792d-88c5-451f-904a-3b27f65300ad.json and https://artists.proofprofile.net/proofs/artist/174f792d-88c5-451f-904a-3b27f65300ad.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 0xb2bf38f4635f10de06a278aa0c8c41d5f896e39773b299d646ba5c1c0b149e1d. 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/QZHNB2255295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d97005afe41f424ebd1c0e4714bf0d7313d63fec60177939c08e7cd74825d2b. 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/QZHNB2255296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e83477585d8dde0ed7c055eeae6e9b02d42450d900e877c279e552e6c8f3782. 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/QZFZ72210431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1942f857321454b6a04ae5df2585d9eeaeeaea155061affe8db8da1e59939181. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:38:36Z), 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/QZDA82266151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434b13e8d43973142a6198309461e8affa39eefcb7149640df4a70791e68ba89. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWZ2253574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88861b2f4b774b178dbae325794a637c52fde816aef728a2b17d0580d659687a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZPLR2206814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10c3c270a9cf980c7e098f62d1abb43ddfb4cb9453c3cc15302dc67b9020d52. 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/QZNWZ2269331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b0c40c5cd683884623a78e1efc0297c80d33be27c62e02c58c43cbc7a28ac. 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/QZRP42298244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe067b950a430945b93652353f6a6342506c504a6988d7ba9a290ef056fd57d32. 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/GX8LD2273238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6079f39980242f6209429e4efeb53a50c5f03312147df95c3bce8ca63889f1c. 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/QZTB22286745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469d3f31bdbaadcce789ea231d500a70907c3a7e4eed8acebe829c1ba7d03bf6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ESA122476720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa576f62ab1a0a34f0cee75c9e31307c16a89b5497520674bc9db7e9217e294. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:06Z), 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/ESA122431072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff2fd8483c2bad328541ffac5cacc5642cfaf7aa8bd47760a27cfc1e6bbe1b. 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/QZTAS2428773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6e8db22862b3722486b3e3edaf1a1caa89afe5a7797eb6b306906321e846a8. 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/QZTBC2459598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f74a9d823a53b504504b7ecfe337ce0bc8d7456c897c37105020d904222263a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6F2559151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7112f835f69c998b47f00942a6055d3ee194522b36d375834e7e18761af435e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EZ2505405.