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 0x7bc1c0c06bcf43b78d9f4014ce323fc44da5938d3005ce10db2157e50a4df9fa. 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/64bdb19f-03d7-47a4-99db-31fd7670d922.json and https://artists.proofprofile.net/proofs/artist/64bdb19f-03d7-47a4-99db-31fd7670d922.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 0xb601db46f4c0e8fa4bf0fd0f44ebeed71052e41797f27ef9468de43d86b98251. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:03:04Z), 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/QM27T1750134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78986afb5f5f81fc6357245b9fa8c283a2920352dbe8b1d334c71f88154a8b62. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:12Z), 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/QM27T1750128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f98017c575faa94d875fb499603709e5171e8acdb906a16e9da0246afd6dd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:14Z), 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/QM27T1750131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56191a43b459902d988e2591be20ec864a19746734392af8d145d48dd3746631. 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/QM27T1750132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa275926e6ef719460921b9b1343222f4e0c4c6e403336b9e016795b3c9864a3e. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAEZ2027806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881db7385b35ee9123b34f17f452d4b14be35df215b12ad210b5b015751f6890. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAEZ2069059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a27a0df856cbe0f1561ce7f67a3e643b223a9b2ad43bca9c347305e927df570. 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/USA5W2200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce66478ffa6c42446b6151bdfa4c11b0cd672b833d44b87138ecdd90dbd1714. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA5W2100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bafa0672112164912d1e3418fa9fcad0b21a54a2efa30777be0264e70491c3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIF2406463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c38915a67d828703790db59b12465cba7514efddf35513ecc70537d3bac44cc. 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/TCAJB2408997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d14a9e1b82f60ba7b362eae6ffd1579e45ea67e4e119a84af7be2cd34ee1d9. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/TCAJB2425745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f1bda4b7eb442e15cc5424c53d0cc95f5062e7574a07f90b94153092fd463. 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/TCAJB2409483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f650a3013c5b4decbd358453a5eb9908d6d42d9e177e1a25a1e3cca378529a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:09:15Z), 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/TCAJB2409524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176d9e3076b2a304f5691f04b61f7adfa8d4c9654952cc20bb81ae856d2e154. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAJB2409679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9f29be165d9c058afa483f1139b633112b307a43a56ef90ad2af50a7841d8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:14:04Z), 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/TCAJG2594691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55dd89843c424ff9527f1a37b2b6a31f1c74611e5376d14277cad41641dcb33. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJR2588706.