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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf77619b9829d96a1738739d53f09d7cd21e74ee3b4c03289a5e8a506af3babc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c96a4f84-6881-4f2d-b9d4-494d8248cb1d.json and https://artists.proofprofile.net/proofs/artist/c96a4f84-6881-4f2d-b9d4-494d8248cb1d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d360ca0959a30a36c5cef83b02edabfa6b3028114100f2b0538becb802c756d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM21736411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a776dee06ec710b505591dd0a738e21edd4253052c6f08a1b47baed84e5a08e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGH1874928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1a9461441a9bb96686ba42cd04499cd04f8b76a830d062a9d262b2d788b63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLZJ2049355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1a9461441a9bb96686ba42cd04499cd04f8b76a830d062a9d262b2d788b63. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLZJ2049355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe277f09b05c84ce0052068b94acad03c3bc17fade71e6a39a098bb072b489. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:42:25Z), 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/TCABP1310373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd633015f6e713ba9f46ceb63ed98d920c4fd495c209760a8c0863b2bef2e443. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCABP1310394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b916ac61f170f8e5e127d8e8b936465f748539eae6bfd4fccdc23d201881f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCABP1310398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af20cd040585eddda7ef7acafc98283351c850ec7f1a1a7b131d078a6ebaf9. 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/TCABP1310400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84e152173c93be6faf62a4e4c67ae026e2714480c68e4b98c57b73f90af7c33. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCABP1310421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aa0d969b51098a3ce8251118fee2eed307ccd219f52c3fe0de4a114a3cb325. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABP1310436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac90c701233669c919a8a619d3778d72620399d4da1547a2fdab6f36c0154bb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABP1310443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8ae97e73494c2486fd2f75ee3b2190cfd867a807e4e38ede5bb9f8f31d78b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCABP1310449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574d88c8d7dc72f2525a12a18c4f9fc8f14898b667162dc766a226a64540362a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCABP1310464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea4ed820daba1234e7c5ce5d769a6684acf2f79e75377d8101dc461a0a8b09. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCABP1310477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c1e5c70ef6662e9bd1f97af67b275687d9ff16cd4d47c90785c1106033d4b6. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:49:16Z), 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/TCABP1310367.
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 0x3dfcd66283dc24c76ed9498faea3531ae6e0f27271c5c03429f7063cafe67067. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:17:08Z), 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/TCABP1310485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc2e3c9a1762c0e1193e00b997a085c349d568f7fa13bb161c27f7c7861ca4. 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/TCABP1310396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771af82f93d5ed96da6413ff6cd59c02c091bc93e2f68065b0e722568d48cb24. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCABP1310397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a7910a29798cecdd121bd3493bdf1e38f35ad8e1127b624ccb2f08f784fd21. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCABP1310425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a259fa0187955b0d5931aeb86e4b6fb2a39029c3e6391906fb8cb603b46b1c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCABP1310429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ab066d6cdcce256b4398c7a50ab2085eed243c2b36bd7d6b9c4434d35bb220. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TCABP1310457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca9e97fecd17d4c0b2ced711fd0fb86f2ae0591e0f96a10c00e514c542d6ec4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCABP1310461.