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 0xe1e570107da877e0ce2a02655559e7f65ea932d423a95b9282ce6986dbf64503. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afb62d7f-9549-4fcf-9610-9a0c57062f1a.json and https://artists.proofprofile.net/proofs/artist/afb62d7f-9549-4fcf-9610-9a0c57062f1a.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 0x2c4d673c3eeef585b09dbab5e428cf35ef0f4e3b6899d5c591040b21f9977961. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZNWR2470831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57be02b0ff4cabd2762d973ac7af302730de3e02934fc720dc23ca7b1bcf57a3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZNWR2470832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04a95478d4e9fbddcff5c1d1f37cf73ea0f24cd1b08b31030482a243d35309a. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZNWR2470833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4104336a0d3c49cdf42249e14466fddb6966ed40cbf15a28527367dfba269bbd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZNWR2470834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263215faf431dc9b0455efc20166493a6955aa3362dc2389d98c51a5d1c6ef66. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:36Z), 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/QZNWR2470835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38f325615e139243a5f046ea7777583295cc4f93bd3562955b173e7f3e4ba5a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWR2470836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532370fa3d46bcf7889f79da3db841a2b288eb95cefbf02315981dfff774507. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWR2470837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383cda64425022be7ad55d422de2ebd4fab469c57246db7b284a2491b0a85ed. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:27:28Z), 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/QZNWR2470838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f94cf1fe705435d48afa9d22a901387643d54c617465bf2004b370f3ddee978. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWR2470840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5ba63af677cf60b12ccf322c24d15b67bbcfdd2e9a0b1fab5f29c7a077981. 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/QZNWR2470841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec8d45e8f8362ffd63af0445fe10d61280ab21dcf3e388b76d955f3068a6886. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZNWR2470842.