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 0x2ddd832e619a02d319379c2918923a878442fb10a1cd2d3d490f9b21a8d4fb4c. 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/69f2ded2-5623-4815-922e-8e864af497df.json and https://artists.proofprofile.net/proofs/artist/69f2ded2-5623-4815-922e-8e864af497df.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 0x2d6108d6ec9b6dbb10b5dd0d9b68afc203a862b16335e7da87825d9b4a40911c. 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/QZGLM2206314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f85b9a39836db84643cc935ff4811eea8b76354aac032c132c1d22d2f03b0e. 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/UKU932341091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa558076079f900f1fee6551bc78a673eb96d98a17d006f847b1d7d037e99fbe0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKU932348951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3535292fd17875290584c4dc15b4e1ae0668326150cf7f5b528ff642df027ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UKR6V2307654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ea83ce8627b901a381b2e49a82ea364bd7ca92dbf0c48fc4f4e01e1e696d15. 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/UKR6V2309274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba485c5a17dbda07f6bd508a189f6915dd574626c26bf7a304e588b75a7f9d9. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GXBNP2301341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335102f389da0a88412c3745d85cb781848a847595f3b5aa4305a47cfd1052ab. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GXBNP2305526.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f6c58056d1ca1845c1e1af2c54d53540d000bc43387ccb61e7af73454baa7. 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/GXBNP2305528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e96c93000d67529423c861a328eee8d216f6f8f048108b7abb873b7aada616. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GXBNP2305531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376e6e05e679e01e94e42f7aaa52cd64a7aa74e49293eff3dfdd39f8b19bb167. 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/GXBNP2449817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea466f726b91c39c46dc028b125013cec58a6261af8f4a868a171a9953a65f5a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GXBNP2449818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acfe30a482ef32f9b5913b1373fe18c6218b9e500c80991a1c4819ea85313b5. 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/GXBNP2449820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e2fea7012aa62ef235cd16a1b6dc180f16443e76b4405c3d8478a32f928fc. 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/GXBNP2449821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d47f7d1fdbf3cafbf0a721338d276eabdc1e8c0e77670bbca80467bc33d6fe0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXBNP2449822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffd33af3ff4c2c336b2dbf264b08014d6992bd856f58bb0861f1090a180c3ab. 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/GXBNP2449823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e84d14d1604c8113896426b01aca6a034ee53a6f49402ec68a529b14bdf192. 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/GXBNP2449827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5520926d32d535dbe05f0673bf57810f5369e3e3eaa05668cc2119ed98418ac4. 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/GXBNP2449828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e432accc0ad4ef9520359208cf5fe92e05ab35316206e09af249fdf146fbe. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GXBNP2493577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915dafaae68cd1f925d128a4ecf557a2385db237188d66402ee763598b24f97. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GXBNP2493579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b0bb46a917ff98e3cc8a8a511fba7919a7937b3ef6ddd316f45c4966ffb11d. 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/GXBNP2493580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc528a8e958257aaad3d04617be9b55dd9fcabe83d8915c9d3642cd5a7c975fa0. 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/GXBNP2493581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc992f45b3ec180eb4beb0dcb15929806e5ae34dbf1b899e526fc1607136024. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/RUAGT2489890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ab4c3fb7a9417aa2b38ae590da863193aec343817a3e72731e3b71106fb93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKEX32402582.