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 0x72909b9a20ec805df254c9d220ba3b1ad0ed970c05d4eda753d1e38bb6790c37. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee492cab-1cf4-42d8-b7b8-5de7d7d9b6dd.json and https://artists.proofprofile.net/proofs/artist/ee492cab-1cf4-42d8-b7b8-5de7d7d9b6dd.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 0xdb6f6f035975806c244ad2f736a8582ea13b47945cc7a144186f36c09ebafbc9. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:49Z), 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/USLZJ2357732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d717285808fdc098ffe955355c7c07002aff05174f5cb65487084a25dc9b87. 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/USLZJ2357741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fc67fe36268bd66c8125f2f827626ee261f5367dcae2d69af51639ef76ab32. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLZJ2357743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c70063756118c4a36571201553d9a35be19a4a24f9b2f3d91b61bb0c8ca737. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:48:21Z), 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/USLZJ2357744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5570f3f929762db29fdc21e0b72a91aef80fe35b65ecb810dc49b0782269cb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLZJ2357751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb75d5b2fe4e09619481eead7a7c036f51d8aa7da048e54c760a384eb5bbc05. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:04:40Z), 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/USLZJ2357752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d36c9c742a492ad2ac57cb48beed61c5095ea9186339858474659a22759eb8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USLZJ2357753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58826018d0091d2abe17f0e3b01997c7cbc3c4edef91d53832348b187d8b774c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USLZJ2357759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a3cf84ae92e0fe16bb3971c38d078e30ff7279f64fa1751052c9b83806935. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:27:35Z), 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/USLZJ2357764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba4bd31b6b3f907d2724ef85b8f06c4345a968227cb5d30a8ee019b65502714. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:44Z), 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/USLZJ2357771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804a135c1085e3b190364f1e290949182e18e59c0b3b0306872f8056e39bae6. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:38Z), 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/USLZJ2357774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ac116150b6fb51115038324db590d61ab2ba4cc8da92f489ef9b81e173835. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLZJ2357775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219be7fb6bb63263e02d5d6f129637ae2bb4353abbc07b33592e259f04066f04. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:39:06Z), 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/USLZJ2357783.