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 0x5f97e2c64325380480db0c55c0e7109b6f094947de69b1c66b36a6ccc118f4c6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0621d51-7779-4af0-9489-7a8925911880.json and https://artists.proofprofile.net/proofs/artist/d0621d51-7779-4af0-9489-7a8925911880.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 0x14648ec1a57f41bc40a3194ff28064ad4c0584fe78024ca6c6ffaf251ad14c12. 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/SEYOK1404809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0d94dad8dfcd963c9f83c7e5066736aed472a2f65ddb50f34b4f619a8b8ce8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:31:55Z), 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/SEYOK1404810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e13c868ddf9ed7cf9448f2810a2ff62f5af564a1a9b37de135797859ef9d0c6. 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/SEYOK1404811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7180936631735808277f9eaf8bf8a76e289c51a926d6733893938dc17c3eee35. 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/SEYOK1404813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8752612a85f7c1ad93d371e58afa225970e2f439c46eb71cd3d41ba5ba06560e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SEYOK1404814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaed107b87b4141de7e789244cc45e06a182f9e648c13948e91dd336c4dfcae. 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/SEYOK1404815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c326943c1ccedabece3af43cf6ab2d9d1c42b7a70f58a6b412b8c1385fbaf87. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:31Z), 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/SEYOK1404816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130022466c7a3955752162a8b325b11c98f81e0ddaeecd87a8f7eea452030c7e. 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/SEYOK1404818.