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 0xda803d04a351898cba83297734ae7fb6da4f2df818f5d20a0d74ff423746ed2f. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/349975f9-6c70-4e8a-94ae-8fc4f87f5e4f.json and https://artists.proofprofile.net/proofs/artist/349975f9-6c70-4e8a-94ae-8fc4f87f5e4f.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 0x7442650c2f72807c8b99902a868c22ea6138476b700eafddd230c7f3b8d48cd2. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QT3EX2420052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9935c705393b063029a31c6edba0703c5c2a0031c7c3c5f8e508190ebd1d336a. 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/QT3EY2427649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb56ab1f432616e827045d72322909235b113f118d4c5374cc17f9e68944f236. 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/QT3EY2469378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a5461b2d55f82cc23bb5ac5e6e2b12a76df523ab6c97362627f948f708a15. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:55:58Z), 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/QT3F32405228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51400c9f518d68f416b4cc8d6b437db3343c9564460c8f9d7aa45e6fb2308fb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QT3EZ2430087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03388ee80affb81b17f716fc8195831c0caad50e7ea5d73dd16db01390b828ca. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT3F32475494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402867ed984c67e61590066fe59721ea5f6e592937dbd6603d6f8a20bf67c348. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYY2541987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491151da4047756527564e1d48628cd70a328f1d322508c16f8328fcec357ccb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFZ32547207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6445b1360a12adc960c4ae14ac61fa1f671af8ece4d8112e039af500b5de80. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32594517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0088bd91fa9d92830730103867097caa85b721d15c6028c45c176b3569d4c8. 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/QZFZ42500826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdbb6b470a6cd35d8bd9a5d4e9e40f239643a679e8fb948e52d01e9d3579d33. 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/QZFYY2589685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd48442065685c29c8b03e1d86635cc5fa0a1c3b5f9f1b45ecb3893ddb71418. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFZ42584143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf21ad02ae06272f4ad4f8204ad61210b198e2e541439f33cd6fe294ba45a4. 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/QZFYY2590809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc718ed1afec237cffee6fbc0ff3ee43cb081bb07d0e15a2e7dbecbe956b2143f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA42514106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bd15564aaafb6dc3781f922e6c236492c489153ce727fe78eef1bec5019491. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZDA42514113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d949da2638f8acff133cd7d84fe6375191e68eedc08f81091d3d4f8d0161a1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA42595428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f1e2d01c1aba3784d9560dbf72d2095481831f760ad3f35f9e8ac4bd4c5825. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA72544760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f41a1863aa6c837a97b4e5e1c7b286f214cde783638f9ef3f90447065abb6f4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA72546365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee6b18df0525e4f1fa37411ab52587f81f6bdda53455d91847af32d9ae0718a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6H2592326.