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 0xfc5aa9b15b8b81c303d3b20deccdb535f0c7a58f069b1d196018e25c0e8ad2a0. 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/a5b7a0f1-71d3-4200-8f41-cad369f0033d.json and https://artists.proofprofile.net/proofs/artist/a5b7a0f1-71d3-4200-8f41-cad369f0033d.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 0x68f9851472d5bedfdd9c9088803490fa90188f48ac6cca4293071315785121b4. 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/ESA031601901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd76c0b985438ade133f3dd2a0d3e60c09d1148825000566b546e7e57212130. 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/ESA031601905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89173253826345fc4e45888e0f8eb3fb9fdc5e9aa6e880b964cff53220caf864. 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/ES6102100355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ca3fa3a644d50fd2d465ceda2cdf9d3d1766ba2a54bc178536e38747fdbca2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6102100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0dea6e769551661c107be70b80727ba6229c346111b7c6f9cc29cab75488ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES6102100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3069bd2a372d0fbf23e1733cac7187c955a8c685bed2030885c41c207712958. 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/ES6102100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eab861e3170f0447bb80e86a2619b9e42428beeee7b409037c88af492806f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6102100359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2525f92eb17c7c05dc5096c9472e4d71eb86592859b2927dcc3d3e441c38bf5f. 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/ES6102100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc7ff2e7ee1adc76bb8939bee8f4ec3e703eeaa1d2d9d4ae9d6898dd827552. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6102100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4938d29f1daabf0273cfb41de9f8b68cb41275ae8d763d6af02922cd03dff8a. 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/ES6101900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f24c4f0f6fe1943e25781f8ec8de21c77e04900dc1ea3ce93757d2042b6cb2. 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/ES6101800981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71708175756a73bce714b6748476c55b68745511b2e2ff1f8cc1135fe375c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6101800982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26fb4d776020f598b7dd4c1fcf80b27ccc4c392b3239002f1a35c7e60bf4a9a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6101800983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b2945b6134098da1500e5af0cf3e609faab81bfd48a534672cea61bb3553c. 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/ES6101800984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01184a23944931c902fc7faf70b452d4485b9b1cb11ae4c940742585a1f2e57c. 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/ES6101800985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f9d80065ff966d981633656ffb1d5e8821b8ad771e34f9c3074fbe9898e690. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6101800986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70777ad5053eb042f0172959b6478c144840fe4a872796b3fceaea2e7e1418a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6101700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2518727153b9d49075f87d6de45dd9779ca52659a87fcbca01d1d6781e4491a6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6101700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341ebd00b440315c13f6ec1c15b906bac2c533d87080254e120d174151191dd. 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/ES6101700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd9836c13cc4a2bbc8be9cf48a1c281a46fca00640b9a11041a4760d8904a3. 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/ES6101600594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a30688875a1fb42a93460c840655cfee6826057bc0b4422abb91f7df11d1f39. 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/ES6101600597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b7f548891077a1ae0ee1eeae6066e5765a7469810e9f2256e981269ca5eea7. 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/ES6101600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952252d63b13f21f36a48d96fd9f94cb3b2f56693056eef9f2e69014edff6c8a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6101600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a71719fff862fe0268df7c661ba78dc38628bc38961ee990770eb8b4e54c9b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA031400807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55262cddb525c842a36d88e5038363e505642cda4b24d645871c8b27b3daa1b. 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/ESA031439002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3069bd2a372d0fbf23e1733cac7187c955a8c685bed2030885c41c207712958. 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/ES6102100358.