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 0x70221ef5836f619b5c145155fc117cb3375241f2043b8964ee150bfc678d6621. 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/2437bef7-7fac-44d8-9e07-678cc3cedaec.json and https://artists.proofprofile.net/proofs/artist/2437bef7-7fac-44d8-9e07-678cc3cedaec.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 0x59928af90b0fc66e967346f554a289fdda6c96e446555353666e4bff2e54a45c. 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/SEYOK1504692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f053ccc456d3274ca280edbc8238d4c6b9195c8ad952da5e3499ebe9f6298d. 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/SEYOK1504693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743c9c0da89777d840532150e0653dab9959a15d8628be1adcf1bbf2f995ff1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SEYOK1511896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596df2fd55b341ec45f87c47b72622646d374f57e450902f2e1f16140e90e00. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEYOK1511898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32669544df80030c5c937dd6fce146b74402b074a93d00c3e4bd685542cdbcb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEYOK1605671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4894854865e6e8062944978bd286e3c9124a01571d4cc94ce0aa405d59fee536. 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/SEYOK1605673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce42fe105f1654253749de513630c28b37931f50b679ef48b599c93027e72a36. 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/SEYOK1708033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c30ddd1088998958e7d8e205900a72381059aa8c64c97850953623607baef13. 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/SEYOK1708035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1facc693fdf2ae1f59811c0f4b8f20659b66728a94d3bc87f325a1f8169f927. 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/SEYOK1708036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a722cbc8023a700f358ef6c0e644e83c71ba36709661dc78f564cfa931817. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SEYOK1807965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2615dbe0a9f6363f6f17b62b9b683bfeb9c369395bdca8ad7cf3d646fe517. 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/SEYOK1807966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa697df252b9160ccdbee2147f1f66ab51dd83507e04bec06681f8c0831f026d1. 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/SEYOK1807967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a60175b836adc24d49f0ac7125d6106e29156723c2990096b6a5180d49e264f. 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/SEYOK1605672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1facc693fdf2ae1f59811c0f4b8f20659b66728a94d3bc87f325a1f8169f927. 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/SEYOK1708036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d2fea6ddc7fb3fbda2ddfd02a3002750067749cac047f64d3c1346d8d19035. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SEYOK1920395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b42c557c15ceee28245ad383e25e717e1f319ab9c35c0e45ec670583510ee3. 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/SEYOK1920396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea297e93682d7615cb2fe6a1aa5dc353439cc9d91343b446e58590a2c7423fdd. 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/SE5XG2038501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3037920b16ed2eff46c61bbe82d2acf70f6379bfb72d5f0a8cf7a58f4730947f. 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/SE5XG2038502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c244e1047b9e7729356e3c157bb0f4f920aae4545b60ffa29d120b66f9fe203. 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/SE5XG2105901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743c9c0da89777d840532150e0653dab9959a15d8628be1adcf1bbf2f995ff1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SEYOK1511896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e77190e27846a87c604e45b04c9021d4482dbf4c0e14615f1f3ec33a2be837. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK1605670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace1417cc40ad1a0d5b48ba07ac5e51aa35b311df55999954e1305fb0f673b6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEYOK1708034.