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 0x7c2f631e0a5b88f1958a5a5a1a9912d2ca37df7cd67376221dd22a60f023a512. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f04a532f-f6a4-4595-98bd-33d194ea97ce.json and https://artists.proofprofile.net/proofs/artist/f04a532f-f6a4-4595-98bd-33d194ea97ce.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 0x478d6d66e530e652414d583d9dee7721527ad56013a1ed406f63e4788d45ce29. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USDY42288922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d2ce0afba7c66471d98cd8a3c625bb216e55b4dad25b840d2c866b9ff3e8e7. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:11:28Z), 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/USDY42288924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a78473c5699cff8254ddddebcfde97fa1358df016e1d99ef6729a29cfef528. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:37Z), 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/USDY42288926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c60fe84e8e1ac1a0e4e45e6a05c1909e10b034a3cf35d5ae9ec218bcf10e6f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USDY42288930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3030404eb86ebf881f1a38b61db996e404cc15f2fe8a77f3f87d9a11456f468b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:26:45Z), 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/USDY42288931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32bb5b46b8cd99284e7543cfa666363bc9ededf9e8886fcb924c6f518858e8c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:32:09Z), 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/USDY42288935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda111a655a87ac6b09c036ede473aeae8abb723680c58f15a5430f3b269dbabc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USDY42288936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c9983a2f3aa7584380a6a9696de0697424edca70ad736f206521ad2b530c1e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY42288937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f5ce9a0413290de710fd2458d9c7e2465bb53c4f79c05428dd461679c9cac3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDY42288938.
Cattails: Wildwood Story (Official Soundtrack)