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 0xed0c39e04e2fe26a923cea5fa8d2820991b08bdba4e126bf642011224697a958. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8c51e31-83cb-46da-b6c5-2a991e6dd97a.json and https://artists.proofprofile.net/proofs/artist/d8c51e31-83cb-46da-b6c5-2a991e6dd97a.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 0x9c9107c3d315cfc59cff68c06813916bfa7f099d3c46da5d5b1acddefdf15057. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US38Y2503274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ccfb71cf76be04c5f051dbcc430cce840c53af806be885a0f7ac3664b9a7d. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/US38Y2510748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07688e3d993c134f147ca9af970c0fad166c146c7ac8bbf201e348bab759b5d. 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/US38Y2539073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22378f5a5bdde5b0952d13cb7a3bd4bf98652e1b95b8f7aaa9549e5410a3ad2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ZZOPM2548468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dee1430a31d9ecf92c0a7112a45662c5dc7de0c22dcbd2b7cb0c1f1991f943. 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/ZZOPM2548469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc085415366daab137378e7616ff5f89a360ab01d277087cca31fed28f6dc1404. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US38Y2424148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362839b82764c6111f5a29bcede4a82ac4d9a2b6c0599ff9cc4e7c2471c02a5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US38Y2531876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd719520c9e32fd31a696636a2ec5430a0e0206f967c8e347c35d373981afc39f. 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/US38Y2427143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ccfb71cf76be04c5f051dbcc430cce840c53af806be885a0f7ac3664b9a7d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US38Y2510748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7b0c89153d57b4bb41b0e02b3f49bc6bb92fca0a8b80ea443c9c91f3ab01ac. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:20Z), 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/US38Y2433358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f65336fffd927422f7924cb94202ee25b50addd6f5585fa4850847aec33f7b. 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/US38Y2547714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3d7cd959c94ae4bd3b64d7dafe8160d25a743bb433159b73b00299ac87cb32. 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/ZZOPM2548476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26caae5ea9233b5748e5c893140d9d03327157e1e3654bd520598ed954736afb. 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/ZZOPM2548477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07688e3d993c134f147ca9af970c0fad166c146c7ac8bbf201e348bab759b5d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US38Y2539073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa536b1279d589dc74f755f526ebac2c4b6aa36a955dc8d904ea700aff8bbcb. 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/ZZOPM2548479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4186afc94ad4b156d9706131fb2ec1b0648633a2433e0133b129ed2096cfa. 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/ZZOPM2548480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9107c3d315cfc59cff68c06813916bfa7f099d3c46da5d5b1acddefdf15057. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US38Y2503274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0fd1979adac03ee65f036565b3dc32bb267fa2359dabc4d0fa3e9d9d3fe57f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZZOPM2548482.