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 0x49aacc54a7a32d015f97aab258a3e9ed70d804fa03105d430c7470429d3af947. 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/5f803736-3dee-4ad6-b9d4-1e2c20d43a9e.json and https://artists.proofprofile.net/proofs/artist/5f803736-3dee-4ad6-b9d4-1e2c20d43a9e.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 0x600638e1864223c72ab905a446aaf56c9afa07fdb474162367097edb48cc43e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN62472386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a26fb1f81285b32797d9d44767544b20a535135c60169d1a682bd789940126. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2390099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7028edc1ebdf249217df52dd53665a5c3f073ad2b027a9a257c0f4db3d09e7f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBB2323009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb677a62755eec0a5beeae38bb6a5129731ba48a3facbbbb423dca2aa6f50df9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWW2348521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e0259b91bd6f888f6a52ea611f52f4139003c70daa1fd36262a07ce489b69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES82396242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dce72322b044aae5d85fb4a63e1fca7f07d8ac60daac8173704b705cdf7bc7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TLREW2234739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c90f4e4e3d6578abe58e57f3ae13fbc55d2f137e7db124f9e0297a9a722312f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6H2259945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b762c5c84264edb5c26581bf5faa0c56b67197b27095d5484bc3c2627456f2b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72217002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7347ed758dd83293189e9b54c529a607a14c95df3b5ff11d990a57d98fe4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMRW52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39eb39b4d86739b58884a03663342e37241248530f8e3f7b939a0541b2b584c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAS2199292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c9e730e13f5d0f841f984e21030f830ed553cfdc984e5bee61e5288b2b239. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92127210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dcb12443d3943b67ca31b61e20bdc17ca8fbbe8c10c36b2da5c75908cbd0c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWX2087943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc195c134155ef0453a2d8c32135178d4de47fed6645b3ed89e1055afd40987. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62023869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e1c7cea28e952b8f2c0de1d830dc6989f0b6234c57e26d122d8f346d21ec2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62023166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce617c16d4cec801ce2a80935f6cd166a20a34c815df2360c1b41d82874108a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52059650.