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 0x1202e4a989937fcf25fec5faf8cf9002dd235d1ae791fb1a24e8aece89ad1763. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5709162-7fa4-488d-b86d-2b62ef41e577.json and https://artists.proofprofile.net/proofs/artist/e5709162-7fa4-488d-b86d-2b62ef41e577.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 0x314b9fb4f84d5d98a3bea54c002a7fc70554ea75d5b31b5e4d783e1af8af64a2. 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/QM3DF2413330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34f1a66b1f6465ff76cd5fb61fea505aeb218c993fe7a5ecc87d017717b16d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM3DF2417296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc593b02cf17a256b6ec082aa3c865f033a324a96f2b8ff21fa7e230ca0b3ede4. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QM3DF2417345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946254e36cb25f31c16bdc917ac971d88067def225fedf9ffdec09fac5867362. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM3DF2417355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ade5243e7eb3e277a63660e96db59ac35665a3d174f9d24e6ba2e5ee16ebdc. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QM3DF2417370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38df2d2065b11e3a6ba965ae0a7c4015fd04e3651a973680ba5c6ff0328e398. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/US3DF2507806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4283c04d3bbe70263b1ce05d520da1e8520370e12c8c46d9841f21ec77e042. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US3DF2514859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c42dd5f39c21203dab1b06d57af1ceb85d929ff3fc8c838067333b891ff9086. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBRKQ2510330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33d66a6a5e7caa453efac953ff6767e9bcd902eb7c0154db060864f2a8526a0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/US3DF2514857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960a10513f541df968cca7ed021cd5d7cd225e30c27f3cde0a32bea4a3022e38. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US3DF2514858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4283c04d3bbe70263b1ce05d520da1e8520370e12c8c46d9841f21ec77e042. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/US3DF2514859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae0a91efd44bb9b2cd24698ffe20018b2fdade2f5ae12f314fec213e06757a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US3DF2514860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf433a65a0471431d9018a83b631d06a6f7608c9bccf4da81f99d26b51f8e86. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2515317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130ef38ce85e5e137f500414c0715e80e1c1256f9bc42d6a44fcd4907e466884. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US3DF2547607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5873bf52de579cd4819078c3c3309f73e5b367a215e757f7266d3a96ba17f41c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBWUL2540965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bad6d8a165ac0cd7bb1d9f23c182f95c6431b06e3640e2f2d8d165fc7d073e. 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/AUMEV2598047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f42e68a20946439989dc889e280114dca09bd54e20355b22a8e033646b5e5f1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZWV32569404.