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 0xfcea877ee1896face56793fb30342d3247f7f800c21f38e3fde7c3340781e533. 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/39f3fbb8-3ce7-4f1d-a1b1-a30e6b7d66ac.json and https://artists.proofprofile.net/proofs/artist/39f3fbb8-3ce7-4f1d-a1b1-a30e6b7d66ac.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 0x6a8076f7150d0d4834ba88fff2e46456e65e2ac9ff2a2b9c6d892b416a63c329. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FR3V01000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc76506801f03f06a5a49ee2eed1afa8eb2b2f1f07cb75c0018e0e28410e0d. 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/FR3V01000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2cfe148d693713bec0367827fc544d5abc900533d3557ac49843b0de3750cd. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR3V01000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c8a0a7b872d96c0846387472e360c1fd90626a984849bfc84d21533ea553aa. 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/USYBL1401849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd916e03e62b6d8ad383e12bfa6ea4094bda24ca534d4f6d472bc675da7641b. 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/USYBL1401852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba1351dc278f3af948fc3adbd26176894803dd4398fe4b6dccf72cd0adf84c. 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/USYBL1401857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dadd55d97014dd9c3ad60f2774e7469aafa93f552c19ddcb3c9a7173d8745fe. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR3Y90900121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b409f88c4e772b8775456f846392ec273a7f988800ab6e22f62d493b779820c. 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/FR3Y90900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d6b8a08fd86e4e8e4335a4b4138ab1ae5ab161a2592545ee7e84edebbdf0f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USUS11203470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968dfbf51c2c77ec0de008f04b6aba0a2811e783ca6a7db828403f9d1c1c598. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA6E81300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa229ad507326e37fc50315eb83c81dea5b21b34e3c504f61e2c4403f436f8f48. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6680915450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee5df4d57d9ec3ddf4627855e5e9ee51f6285a25454ebc6d4be6d44ba9e6648. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6680915454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e45fa6ed6b2277d8ae3d7f738d4472e88b8c2855d4e54bcb5395a8bfe94baf. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM6P41848331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f44591471190a8741cb643bc131d12d3e124c2953119757d46474ba6a623008. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QM6P41848332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49a136bd430679f3f894fa4402afe808a95a4329a8bf840ebe942c76fe2ddd3. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QM6P41848335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2a7289c7fe3c68c24af408ff129751c30656c946f999d33ac69fa8252f774. 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/CA6E81900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c406d1527c13f694d2e5972e7000481e39749d73034666fc3fbd64ae637a12f. 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/QMFME1918962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e795331cafe981be8390a04abc7d39274a79b8590529d65a2c4d16f0be55bb0. 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/QZK6P2077042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bf40e5ed13c3643bd642b961d43f91fd8797fcdcd446d09f04a5df404eac86. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US25X2100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e04da46f07b6799f6195f50bc1dd17d14c5342ce8d81b0b5f7827d74def05e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US25X2100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcd8b406b2efa40e6655a20ac7d38979c6445456c821ea18b7f45b917bf7074. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QMDA72342619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cae20637487ca2c691a533e922e9e1e2f2999319970c2a976e1eaa8c514ee3. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMDA72342620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86092088c242c903b2144e0280a346cf0d9eb0f11ceb81eea67ffcc98a657b7a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QMDA72342621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3565aa962e000d1a807f4f887ab1c70f62fdb42f21d79f45a02532370ad465e2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:56Z), 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/QMDA72342622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0431e6cb01ef849cf5e9d87801bc68a46c48d83d1a2e579564d17da307e70ef9. 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/QMDA72342625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81f0131b53bd0350453825cee65ca0766f663e36c25380cf7d624f02dac96d. 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/QMDA72342626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8709f24635f1aeb93e19fc8cc888d9dc3d3333eda08bb0477421576e42a3edab. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QMDA72342628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7c9dbfa1cf776b1f6f45cfff50211644946a8dd4235a0b5d2cc7e8dcf98ed7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:46Z), 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/QMDA72342631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a961fe0582779f7717425f3379941d29e3d2df7b0fb53472991de7c7a2eefe. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/US38Y2516876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a961fe0582779f7717425f3379941d29e3d2df7b0fb53472991de7c7a2eefe. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:30:01Z), 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/US38Y2516876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d35f6f0e42e899ebbccf1288a69a15fb54532d85aaf2003e47a38d4c5e271. 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/US38Y2516877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128675f91b5a12b1ad2759b222ba56984db5723faa67eba98372735cdee4038c. 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/US38Y2516903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8595f1d801c389bd2c325344ac780508a2970ae0ecd51be3c09f89e3dccb1958. 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/QT62U2518383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e51a8587afafe2ef80f0d4b5285d803194888b4cd51c912046faccbeb124c4c. 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/QT62U2518384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1406be33f6f7bb3229b2398d0283611735f451f5e237f0114a8b0ee569e538e1. 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/QT62U2518385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf796e9d793d86252f5f352cb5e26bc6d08ba8bc5d8babcf1bf58c05ac5203a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QT62U2518386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222b2c699214d5c3d8a3114ac25e39a5a5cd0dd77f359701ff5f42eed931bd06. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM4TX2117398.