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 0x7433fb12cdf843f5670d995c5d24f0774096c93ec496ed9d525a16ec4d727736. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/624fd9a3-fb8f-427f-bc88-5b695580a384.json and https://artists.proofprofile.net/proofs/artist/624fd9a3-fb8f-427f-bc88-5b695580a384.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 0x76d450befce16cab681e76200025c700b18c2855febb9b7ba7e412080770abc1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:04:14Z), 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/QZTBA2564660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ed8e2e820db49065db83c02e62a30621afaed331c34c05523fe31afd7449ed. 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/QZTBA2564661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73cc7a5efbf0dc813bee5f3e40746bf40645a86de0276ce20a4769bf9ad667c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBA2564662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b313d860545fc11bd3ae642a394adc12340daac7f4151f7597bd93ba882b8d9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:36Z), 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/QZTBA2564663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bb1dcc1bf9342b865505acd4fa6986bae71a69a96ef52b48098b5208aba290. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:02:10Z), 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/QZTBA2564664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273808d7e85bce0f36883afafa9918c2b88c8dfaf1d56597ab4fc08e209d093f. 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/QZTBA2564665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206dea66918e0f2d4ba7b8a97d2fe705695f408c9baa0802d759a6042d23cb9f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:46Z), 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/QZTBA2564666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f02747fd23f843825a4938cba0539555f10ad73b8bbb8738e96ec7de91d45b2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTBA2564667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b28ba915891918e6500325c884c59c7e35e3572ffde6cec1dc4dbff2efea21. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBA2564668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6cd8419259aee71932e34bb251f070533a20912802c86aff939592db9115fa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBA2564669.