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 0x587f91fa545bc74cc5545693b13692100174d38bbc588ac597529f3e34dadcef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4696cc6b-c2f0-4b18-b0be-dc56ee828813.json and https://artists.proofprofile.net/proofs/artist/4696cc6b-c2f0-4b18-b0be-dc56ee828813.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 0x5fe6b8d007ab1bd6f4d69d2e3da6b714a28250f0bb8d45031cfd2b21cda994a7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:28:18Z), 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/USHM81059310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec099fe7c3d3b264c8c3c27ebb53b41c357879cf4a906a3341933e78d4826758. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:08Z), 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/USHM81062648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe0b165bfb8ba12ad6b8670f9f416ebdb8d45466a7756af95a67722270461dc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM81062526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950b3d9706ef20f043b7cbdb6c8adfe3e8228190f33436259981faa4822634d. 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/USHM81062529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa4b5e69878d72663eb521eb0de1ecf75f17a3df425f311f98efe559cce8bc9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM81062532.
Matthew Ward: The Matthew Ward Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa056bdb27126c0109cbbfcb81b64423827a959ef316c9cb2a327c2793eaa0957. 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/USHM81059293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc1d3bd0ed67d89320554eee9b4c4683815351b54f708167e3374bbe59113ce. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:12Z), 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/USHM81059294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd186efb9d83ed733a4efbc7d3cd538482556d09607928c59cf5db33e1fa54a12. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USHM81059297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3345ba0f8abaa4a919fd0a7858781a5622d65213ce113c58caba531f61f07d. 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/USHM81059299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f65522a5925a4c39c67bfa679f42d201804659063357fccc5ecc9d4329b299. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM81059300.
Matthew Ward Vintage Collection (Toward Eternity and Fade to White)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb0021b95a05ff1404e0dfbad12cb9cb11f88c69793f38987eca9339367b31. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM81059312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c47814a629e260cdec36886722525b4b107b2e96afa66064350b44868133101. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:20Z), 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/USHM81059316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cebd01f2df6c797e7b7fc52fc893c7efd17c33c817162f5426f4617b1d3bfba. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:26Z), 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/USHM81059318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e835fb7ca680bb130c17fefd8d790ad72e9695914c3cc5ab00634e9f693c7d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM81059320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb353263b2fa8b1ef84b1beb5baa04614616102e9e32f54413630e71136a906d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0700820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a1e4cfcfb5293de4c09f6574a75eb1d0ea3ef15035bdd18c2bbf5611cfb38e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMEU32119795.