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 0xe2f5bdfc1330daa671462770ff440c53c24ccdedc0bc9a868ed270b592a9b22b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63fa12f5-2351-4061-b04d-5fe7751a6598.json and https://artists.proofprofile.net/proofs/artist/63fa12f5-2351-4061-b04d-5fe7751a6598.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 0xd5f1ff6386025baa449f2046297b17c5dcb00da1564b2550b31f6c0c0c46a962. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USX9P2445321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd9026f2401ed6f9e061eed5f44b1fbe9af19df4d5c3020f03d5adbc18fbb70. 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/USX9P2445322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec346243850e01afbf15c3c623187ff0bb2532ce6d6f560f6b37fce1edd6751. 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/USX9P2445323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7509cf2e1c694ac08adf4a0232bb605b02a14103b8cc456e00f4ef364353d62a. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/USX9P2445324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090704f6e77e7b849c5820773eaa5f06a8ed17cf350eb558bbad294300f8ea11. 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/USX9P2445325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db2ef1de1f86813782aa73b3260643d06e7801834bb42c04dda36dbb93a6cd7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USX9P2445326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ddb859eba2eaa4147228f5a11a854f496e5edd5455e6c2cc1e3bd461224a1d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USX9P2445327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f7aa189071769e9dae36281545b06c72ab9ef1ac101b7c53c6ee2a2d3de8eb. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USCGH2520563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c51d20d7a2bdda911e2317e0a0a11b02075f9849f90c3f1b8ff03b8283a806. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH2520564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d1f99ddc7efff1cb848526fe590185eb7ceaa0343d7de7d7a56c1c219d8a62. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USCGH2520565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ccd1b8a19a054d718b51e61500ac4bd0aba84c414eff2a788099c8fd92225. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2520566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0609f31038864226a0b22964cf10efdc16c4d53e9f58c083731eb0736c73f173. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2520567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f59781d36af2cc9ceab6f5f5a4bd6d45c86b5da1089806ac0a570966ba8eeff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH2520568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0e8d48582202257ff35c1694530e3565a3b4d3a18eaf04d34b1938fe730ed5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGH2520569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35efd4ddb1f3079394b9577f9a21aaa5b67d9778a8aa4fb6226a179285da9b48. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH2520570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a898627f0d78e9d1ba5212a56861c26a339578454a78ad8376b939e7beef653. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USCGJ2598655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e32b5d4ddca3126c1dd33b083dcfd34f59cb4b8c21450a33844f36c3956538. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGJ2598656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7828b8092de61800457d21fdfe5c2409a522c9d02e9c10a91761a38c9ba80. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USCGJ2598657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dca02b63fe05a240901783a16dd6f897ab238ce030feca7c99f99bed7a7115. 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/USCGJ2598658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9772ae7ae3a4c21a52fe3a1f2365074ae83d1223cb6b752b0c0d897f7a33a8af. 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/USCGJ2598659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a6ee6c034ac2a03a80ff995518caca7c89af0bf853d7e4e4d9eecb438e57c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USCGJ2598660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b20e2f9b1922966e14eb6a3d2a3b130353b24185f716beac75e0c36a52231f4. 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/USCGJ2598661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76337ffc0999690309db1969edc8dfe042e168971c56d70a19ccd772814597ce. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USCGJ2598662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2057e2025ededbdd86dc85759dfdae71a6761d6666145a8eb1d92381992e27e. 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/USCGJ2598663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f206cc35047a8592abc8eb9deeb2b1586a569271492391f7811694b2b90c0. 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/USHM22515081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2267772c7322a1430884325f9b8903f256a4e6029ff39ae54fc64bbf5c93be. 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/USHM22515082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5811a7b547e567e11fde0e327ce1ebace6f07ff1200f51cf3b08887c21a3ece5. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/USHM22515083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9a8ae3f015d9d5dba6c31d1d324aaf2b0c73fcaac514bde82f02e5958448b8. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USHM22515084.