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 0x7d9f6fb98b3696dea1584d934e0998383d4fbb6a9ff7a9e528c245f275e0e06e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46266e3f-9f1f-47bb-a1e9-cbc3f56a234d.json and https://artists.proofprofile.net/proofs/artist/46266e3f-9f1f-47bb-a1e9-cbc3f56a234d.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 0x0a74c873c2633d183a13736f855e0ff02d6cf9a5fb372e8642b39c62c709ac5e. 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/ESAAI0249847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0cf76fa08e28c078f98c44d6adc9539c06549572452e8e7e38ed355d8914b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ESAAI0249848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf0ecf9db4c900de625ac5a572251e15a3d4786dd84f521a68b2a3515fb692d. 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/ESAAI0249849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6358673baed6f2497a9e9db6589f458fabcb7fe16ef608fc1e91a0094be32852. 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/ESAAI0249850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20083509de96a714ff740bf7f9c102ade0859c12238f188545d8b85193f57927. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/ESAAI0249851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe299e906679e7a5dbef0aabdeb2104455891c4c65addb1f28bd60c78d376a738. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ESAAI0249852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54e88631b3523804868bfecc6f9901db3a9966154e19447addc502a31530b8. 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/ESAAI0249853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49a2767d8eaa7468fffbdd296e064d1e832e7bdceed086e9ff670bf67855503. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:47Z), 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/ESAAI0249854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f5a5deb3c9ee36a5285d990740b208ef2961f98a8c361f5e0a0905f4901e0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ES71G1307688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063d34be446e2b8fc4a6af58ae8365853bba80e5657125e3fd7cd0f31d847fff. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/ES71G1307689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c748bb0c51e4ec93f5102fa6be36fe8da55d21c64f09f61ee59646da436114b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:32:03Z), 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/ES71G1307690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd551b28af4590314f35de1b8e3c12c166e809e0fbc07a9add29af44df210821. 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/ES71G1307691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d045bc8d63c7d8ee8d5c38979fe590f1ef98fc8b724cf510abcc0d4715ea03. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/ES71G1307692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639efa0631935fa720118474c333c98de02d56bfd45c041eea5d8d76b58603fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G1307693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34bfccdd2282075dc9807d7de8cb550a0bf77ddb2a05d4ab168f24f8ce385b2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:53Z), 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/ES71G1307694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c549c2bd0335361892f382f1ecebfdebf9939264e192224c73bb40932b1513. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:39Z), 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/QZZ972442561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8e8fe34c5d2ab1e5ea9c1869e5144993ccfe208a2195352a358a1e50e00e81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNW72407811.