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 0xc0e81e0f0b7646dbbb43bda4497433f65dd458966c9ce2ce7d852292b133e9d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32245d71-94ee-45f3-8923-eea6149db179.json and https://artists.proofprofile.net/proofs/artist/32245d71-94ee-45f3-8923-eea6149db179.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 0xfe46774d093acddd3331da05a0182d3da85fa61b7b802198b72a617b007ce5dc. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZ85M1949065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9262e5668fc330c03db8305b4942d4b617915a4ff7553d60867a062ccf9aa6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN91912075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a81a39e11f749c13118a2543d3d2ffeac48e2a05e8980c13a6e3520c8c9af15. 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/QZHN32149652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99eb542e6b0d72c051570396e24c3622f0a34f3cf5eeb8e3605248dcd0fc939. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:06Z), 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/QZPEW2128131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c573be2492c1b07d836215f6722dc5f2ae0b44f012715b9c8ba21a1fb70681. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLR2292167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c838dbcc29bfd448b335c3422959746f16666376ad82dbf5cc9973f9d21b0d. 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/USHM22376596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81298f5613907e23b0fc9abe7283c0e2b6d5963035f8f17ae355ad83ff4957c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLUU2400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce970fa63282a4a0e1c6db7ffa5786ed14e0a561af3569f33d97417884fa35a1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLUU2400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7a2cff7882d1dfecd87405c8a8f9f857d3f2361c6d4555999f0323641f0974. 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/USLUU2400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3214a2abbbcfbf3003cc102e485b67906290389afb3f82f8519ba2ca553a69. 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/USLUU2400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647cc35b23cdecc4891759076d05dc3ffcbb234b67c3a79a745fe2b7682f3b34. 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/USLUU2400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e7a03f6095f5d3e65bc20c056d73557e5b5d2cb0682b700350f1897e66612. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:17Z), 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/USLUU2400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015d9aad2d7869a134c5c300c8afa82d7c2f269fc8ae1ad79e1a34b4777aea3f. 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/USLUU2400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf002ba57bd88d20b5dc4950e73e017274f61ad5f9302e944f3dddb593f519ab6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USLUU2400505.