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 0xaf3d993d690d3b408daf94c036c721bf301ad0886f96312712116aba826c7d86. 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/4586ad08-712a-40ad-aa77-6c439a12ea85.json and https://artists.proofprofile.net/proofs/artist/4586ad08-712a-40ad-aa77-6c439a12ea85.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 0xb55c62ea038dbb10b6cc4fe0621b11b839dcac3a7c24b84d8e92054f40ee4fb9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USA2P0402097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72126268409ec892007dde51e2b7022f0d2a8c6abfb26a9e63679a47b36fa3e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P0402098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a94ecfbd4ccc60104ec32c8425ee9c1bb30d5a8a02bec09cc1f97b7d05a77a6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USA2P0402099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7f340ad3a40281d5224c98cb64a27170be0333236e95e1d852e92da438ccde. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USA2P0402101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aa9fe2e32f727b398068179d9ba3b2adf6f41e943607d6cbd70b675c045fcf. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USA2P0402103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a4c0e2640edca69ff33c39e0dd6cf172e56f44ba05df72a317cd4c69305309. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P0402104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b91623b1102a68afc8f4820aa04044498ad90bc8de2fe7dd7975ecdf8f6c065. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USA2P0402105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff623008a641802ec95384e41ed3e9ab006fab45b7abb5cb35193ffec936ba4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA2P0402106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfa5cde02f527afa745d322e3c820a4984491b939992362b0e862a7d621c697. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USQY50909792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed7627cc23394c040fcf7db7ab33dcc14a2be026703417792bce5769f5396cf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USQY51026484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0945343d50f8e35e3c2a8d30fb526e072e312b8c5c7d1082f6095c8b007b2c0b. 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/USQY51026485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a08d73ec8d856e5e331beac4e24c1f275d001926740d36ae88bc7af3d3962f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USQY51026487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca64dc43296bb70a3fc34895e3e7a19e59cfddd7795857e692db26817ecab73. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USQY51026490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054cdffc49d0fe0650693348902111bb1118f8a9efbc56f8db1edda460b08752. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/USQY51026491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9841907faa0e99e91d2a0da705bc8299b4c3a5378b2e7765ea553402eaeaf45. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USQY51026492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d92b7f273c7f047c1d50f1ec97bc7545539163b24f3196639a952ab4dee59fb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USQY51026493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4404ec858a1078e5221af045db46bfa8e5ff37dc09f8575c7373ac2e2c52fa16. 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/USA2P0611701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0534af795a2e94b02537c94532b7d806aad88367a49ef52acdda011ace909c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USA2P0602239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f40ce7a06a7f8d6571e017cd1206e235a57eddb89dbff32af9c63a785ee6098. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA2P0612260.