John Glover Roberts Jr. (born January 27, 1955) is an American jurist who has served since 2005 as the 17th chief justice of the United States. Though primarily an institutionalist, he has been descri
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7234b047e1d475a14648664a33bb354861a6f4593663146759c5259fcba7f5. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cec9dde5-0bb9-40b1-913a-499347518f73.json and https://artists.proofprofile.net/proofs/artist/cec9dde5-0bb9-40b1-913a-499347518f73.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8a6c756fccbfdbb1b782ceac1982ea380f28b3bd109205fb85b6011749b0d9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DECY52200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2af00366257eed4c8fb95d3e4d7bbc439aefdc79bceff9623ea3dd40883c38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DECY52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a689762da11f595a553adb4e8f776293327a5e7fd8ff82618ddb56ce5909e1c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DECY52200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0a5e66e4429113f85b51743e6e991ec3e1892dd85c4202391121589a1927dc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DECY52200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf259ae9314aaad3fb01c7f467660579c686891398afc3f06e8b557a26b0c7a4b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DECY52200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e3d8fe3cd8052bbf089713bfbb2803b7bb13f602773f089d2eaca483cc7bc3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DECY52200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d374bb0d4b6d5740580b1595ae4168db62355dafb65927ad130aeeccde78c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DECY52200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcf4503320b28d6ad8aca496951f8b758f6476d9199a07d75307e8536374ed4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEU671601987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6809ef14daa9dd7179620b8ad0561be1831a5d1dd61d1c1ddaeb6386dfca09. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEU671301296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b82ced4374e9aec6a436f07f01e4560a97a2ddf7d33af28b25f47eefbc18b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEU671301297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398911adb79f1efadab6ddff5eba48e85919b282ec00f202fec5e90d6afd0bbd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DECY51080221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7f3bac9d0677548a5a704739e4bab0fb8a14de22df4255a627453fc4eb97da. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DECY51080222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1ae65230144ecd52e83a3195f43bbc58c41a9f07ae12f29cf71736d1a30a13. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DECY51080223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498b065f87f64474531e9b1ad98047941c97247c71a17f739249a363cd77db15. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DECY51080224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ea7f885f9d83ff59ce95d618f578edfe40412512c4e3708f827c453c2beb9b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DECY51080225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e5585cac4475c8f8e9a14923ed0121d10e4d7a68b58a62298242141adb71f5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DECY51080226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb6b86040fc7b2febaadf44906d84a86ae09785625982cac712b7e9ce65ef88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DECY51080227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cc98798a1b8f9215ef1b3a5f9b4d9c6f315436711d0220fa07dfde0ec9784e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DECY51080228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693225dd4c14281a43187f4b51d41e791227fa6224924477d86cf9199fdbde2. 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/DECY51080229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f13a288d5e72c45ecd58b4c6f19c120d7f4adf46072eeaf1eae3dbc500977d. 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/DECY51080220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d31f30f80335259629a1016681cd27f500d00ab153c3a85c61685d799c23b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DECY52301377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baccc68b18b36c2d931dc4ba78ea47d08003dcec88f4f31cba56fc5662ddc4f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DECY52202284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57880af03d0c2b18eff27510b26f590e7ddc81100a6aebb12a3cbc4f61f31b4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DECY52202285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8a6c756fccbfdbb1b782ceac1982ea380f28b3bd109205fb85b6011749b0d9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DECY52200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3cbeaded8e50a441ed84e07b989113fc375c010717f6fff4b0c2bccf154d3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEU672100425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e98d8f895d6af5d25b27d3317f6e993558bef72502082238c6f075a0d3d0eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU672100424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd302681301ba9968eb0e3f10b8cdf46ede30a3683ceda505962e2a45ba1c23fb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEU671901828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56799d79093a66035eec783b18a6f594a083f5df7594cbdf3ec494d4f516f900. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEU671901829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e89b0aaf5925e06845eb4bd20c58ce467f179e06a87573706d075b2d23a82c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEU671901830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef77d44cdbaf914839fdd9cb7476182005bc493d70bac93d8d6bd2e74168474. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU671901831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9f1ec8793e2821873891ce14c7909cf4b018d5f2e010d73d6626b845ad5128. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU671901832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d062f9445326449b100461570bba7abe414c4aecc8c941b63f98abfeeeec4c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEU671703138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd001873eaa12b84881905f74294d2243b57a172e5d9f8f693191fc08592c3106. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEU671401431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94f973930b9609d8b23c87a98afe1e24a4c75d1df1c30d465b41d265dd1d34f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DECY50880421.