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 0x0c2c38e2eb8bb1b008a8ffb280379f876f646d72486fd9ac52868dce94f4fbc4. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b2f75d5-957c-4c87-82f4-ef3986753888.json and https://artists.proofprofile.net/proofs/artist/2b2f75d5-957c-4c87-82f4-ef3986753888.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 0xf3dec333bde112795c7a19644dabbb7204d86362c487ec6c06e37071555b6e7a. 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/QZHNB2563619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2548e5ab922a4f570ec1621d2abb57f8b505ff4dbaac7aec615ee7d793b977. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:15:18Z), 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/QZK6Q2579761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f32e2d006bdb4b05d082ae93c6cb8f16ecf5e0573198f0c368e1ca8c654ab6d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6L2513007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3565a64bcbadbcb8bb6e2f21eea87873a264df98bf2bf61a5decf6e95b1067a7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6H2535137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af0916811d0f9be1b4e77ac23e7b374c6203cdc38041d816a9b4c2a52c1b4fd. 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/QZNWZ2596772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a078124188425fff450ad3fcff6c04750eb8a2d4fc5863b2f3ce4b6e86ce872. 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/QZPLS2563012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e4854b46f2181da33fb739565f057e79448e39b6dc40e0edfe260e7311fb1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAX2594644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bdde6f4a10ff1d33467c7de239ec6c4fe1279c2af9ad5eb3df806112b834e9. 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/QZWFJ2559533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e20a5b01a96d0d4b11ee64d7bca26652050a91efef3011ca5e280273041f877. 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/QZWFV2580447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7ef95ece3b33290f1b3fcf33a6076ec4da4c151da3803f2d8a378c6a6b9769. 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/QZZ7T2506795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb334397d12a66acb2a4b4ccce03bf2d07aef585564b4987ba838236e3fdf46a3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:10Z), 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/QT3EY2536297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5e2d7b9a94c3a1d097d3666dfc72c109d9c8f8a38cec848de9cbbacea06876. 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/QT3FF2564128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e8ba2052032575c929765bfa164dfe135fd184d2eb55c44a1b0fd388a4e87. 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/QT6ED2503427.