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 0xbaeb4e4a558035f54f95081de5a1b81333cf27ef3a169462a8622dc09a1d1a64. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/578eb5ae-0299-4b39-91ed-0a12d828bc3b.json and https://artists.proofprofile.net/proofs/artist/578eb5ae-0299-4b39-91ed-0a12d828bc3b.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 0x7c58f6224fb66b3d2f1d3223414620d7cded345857949f9cc4a542e78277efa3. 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/QZK6Q2018057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc676cc516622e20915383b8ef4311fbc6faf3ebff636598156172de5df686b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6M2077999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7d203f575241700073c7951262593275c4544d850b0cec5d0caa1294b67a9a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6J2068542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0376d28767115c657af391c7ab12cbe4ceaae3f1a6470f2880a51d6f010eb85. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZRP52132526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63f4c26acc3201cf1892d56fea6ec80784bc0b84e166bca43a5f775f2cacf45. 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/QZFZ72219984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaf7641f66ba44198dc46327cba1670c2cb8691177d4e2222789dc984b4ddf5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:00Z), 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/QZK6H2303421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c81d4e5a1065f3886874de01b4add681c47a4ed35e139076e05cc4874e9dd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:55Z), 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/QZK6H2344089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce2b4b9d3ec4ea76129796536b2427409f7522e13349a1e33613871a38f9c6. 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/QZNWV2310347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7a49dc3db535c684ccb4b3160ad88d8a34dc8994340cc274dc47034bbb13ac. 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/QZRP42366680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc673f017c482b847d3659e231587653c6635282200d4634eba36b1720199038c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:03Z), 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/QZTAS2327436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6af180705e0ba2f190defc909409e0d0b24d6aec7a84fce88a95b201bbc37d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA52481004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef5ffeed13d55c551f2546b307337c6facba14e94da36534992fe6b6f9050a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHNC2472130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8746e35013f94457ea64fb1f9615be5dfabd4f2f52fffa9c5fba056b0c6fcd3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:18Z), 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/QZNWU2402969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd334df62fea2bbc8a5248be9805bc077318c4b7542303aa308d6830e58fc8046. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWW2475456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29f250193e0ca3456083b9fba787acaa77daa4b9d3db9e68f9fc4f1c8bd5943. 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/QZTAT2453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9039a9eaa149dcc177178bf9cb8fc7da65941a68453d6fb5078ebbfe1c378af. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFE2402165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf9210c0377c7a4d00f914469b6a69229d77e36651b1fd1a3f26a61acdfac8f. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/QZES82580624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb415391d4f34bfab0ab1fb09016cd3225d6839ed4592cb98b56095b4fb2c6b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEN2506760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d22f3f5f745da9e2e2751aaf61af0c67a367e761da1b8fc0324d0ef1a207069. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAX2510136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64529b81b39f0d7922276576fb116a73e105c0c75748142af384cf50c5d635c9. 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/QZTBC2525231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0403dc2f828282b450cb6bc14037ecf6eeb85bb62312f20d5ef8808905b80d. 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/QZWFX2513868.