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 0x6712a4faeee8cc00746b766e7583e681ac89d2b25f2962d1e516e3d538e50585. 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/4ffc4961-2983-4d78-8eba-7b540890ce7d.json and https://artists.proofprofile.net/proofs/artist/4ffc4961-2983-4d78-8eba-7b540890ce7d.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 0xdc98dd804243b69b05dfd4efdb7d7f8db704753be4dbc3f52a33430738469017. 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/UYS052000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193d1636e4e7addf05a7c760caa067173a2b701238adfacf2d18fd14dafe0fca. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/UYS052000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e02dfb81448bd7127ac7f04528710c5c3e6059192dc441b9cb9a2e9d6a51a. 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/UYS052000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f94cbabc81a3945efd84a69488c37ff43bee10637563fd442799e7fee7203d. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/UYS052000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64f4e197124abbf38be1f092757d20dca2614ee3f694db56482fbb830cd8912. 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/UYS052000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c8823218481220380d92c425ca1bad5aa948ac1b4aab08d1cfa29aed015af4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/UYS052000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b8345b169d8637585d662aa5bf8c321bfb29501a4f64bf76b11ca6d11fa50. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/UYS052000574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7450d48dfa70f88770710e987b96fe342928ece9e03ff4e89c796ce1ae67c434. 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/UYS052100661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc785800a25388f35364b659e66529b8cd400e4b0825ca701a4bf12f9d2715c60. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UYS052100673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273bfa97b0700860862a48952d28947bc16e38afad14542ebde49a0e20aaff11. 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/UYS051900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fd17243ed063e0fecdf1354739d25f73b4cc67f19ca13cf295771fb972549a. 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/UYS052100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedee8c8ecf238aa5292067fb0c45f2dac89c46e55cfefe735cbdf76f46f4b6a. 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/UYS052000670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde9e2dfcc9b236188cf6ff93c5499c3e9ededfcafa7a41635466e0df50214e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/UYS052100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157869531ea622deb9b9bcf97ec91d11b43379d168c9dfba293033ff2b5e2168. 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/UYM122400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10204c7e53dbbb65bfeb16d5c34e7c369a6cac71164ac67d8fc5de67c92cacc8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/UYM122401063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888a194e12b6c1835c5ff0fd20d9ea28bd31718b42a9db628bdee70a5925082a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/UYM122400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9736e5b1bcaad4360f0063b90a0ebb3d695d1816c6c0788ecba20a50b48a351. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/UYM122400665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf33c06f0e20f85bd03628afc547332f1d3dd4a71e3e6a2ca2652feb758f49fa. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/UYM122500984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56ca9cbe20aeaf8b6467b779a51c2bacf636ff886d754c9346b3d75587d3555. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/UYS052000681.