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 0xbf4dbd1ea9279f43276a4b0c562928df0a9afb76d59743f4bd6bf1448905f43b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/605ce502-9d0d-4316-863c-d8636c58adfd.json and https://artists.proofprofile.net/proofs/artist/605ce502-9d0d-4316-863c-d8636c58adfd.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 0xfa0155056a11586458e07abc3b1d68a99b094e099e80182c5331e9f9ec3cfcca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACZ1715168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556d74a7a5b2534a7bbf2073a14fc7f80a3fd8084f80b092c7e88fb06c03bb02. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAEP2064050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9eafbc8ba89a5c5b3edac10e492c6f5abe70cbd5bd32a3f841202b47b0c534. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAEP2064058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144e0a85bef0c4e87d6fefbdab8b9595c8832303244a68eb2112e2a6eae819cb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR0512006640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1b8424f77247ebaa1f87af94b48c286ee07a6b9f907ec928b1d2d50ecdead. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TR0512006644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b1684fd2275624a11fd835f251ba108110eb8c2e2b24f5f8275796e5d2f29e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR0512006646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421857067bee6d9469cbf3b872054d8f06d05b6199420b2c6cadc505d34d96ed. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCAGE2232771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d46db1bf01de56c05ebfebc6eb08571b38ac745969de70c8449132f7c66cf0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:22Z), 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/TCAGE2232790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3417791181f184e754fadcdc7c490082dea7ba6199d93c387bcbb722c47eb9b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:55Z), 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/TCAGE2232807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7140a54468c5e1c55fa1d7b7f35680054f4dad9bc2860b053042bf1ee7c9d8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHN2361887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154dc04593dda61e4de2164163f07bd8c814dbe579ff6e7cd810ce95fbe4a52e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIZ2405849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9081685b567a9325dea7482cd6e012bbff0b7a9d2d1ef4845117e82231c427. 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/TCAJH2537058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de3d181b6b7c0271dbbb528828ebafa56276ad262039741fd1837bcd8ec5c74. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJR2507883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda58d97cd54164c093f2ac892625bc90e03fcdbe667408c6836958ebefa8b27f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJR2508396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c0bb5282558b21dc537610adec3b8a9c43a62e6b4bf77c029e66a9877addb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:54:39Z), 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/TCAJR2508419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8833e2e92aef6e2a9ed30fecf2c05be5f86b02f7339a9a0d20cfc0db11d4d1a9. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:47Z), 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/TCAJR2508442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4c2f8fb736624b08327086579dca1e6052e8610932a69ff0071d097326942a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:38Z), 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/TCAJR2508467.