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 0x830fcc101742201fa076a5e382db14251826dc505bc123bf8cc014f110d4d728. 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/8776843a-8838-477e-a158-2cd31d84f25d.json and https://artists.proofprofile.net/proofs/artist/8776843a-8838-477e-a158-2cd31d84f25d.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 0x28088c69189f2db2becfc73d3b6709bed841418faa27f28b4d97bba06f45e26c. 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/USHM92298105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d11699680d4643a7d153d07305f940c28522c2307ac076363e94f304bec1f01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USX9P2366686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3da063c06976ce9dbd6cb2798b5ff47789fd5b13a591d9c29d270d40d74d8. 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/USHM22306175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ba9f532208e24d2720ae610962cbc948f231e7c4865b9a28d07c2654affb97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH2339432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc107c56c567885b7593b244f888fc9cfa7211b19cfb95924ac5609d056079. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGJ2329813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c69b4a81a2eccc68e736e636246cbd2f7199c6fc8ac07a25c8af21d754e963. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM22473912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e95d912a75cb1cf34c05ddc5e811cedbe79245d3c9c9074261e6106b6c2692d. 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/USCGJ2405649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edffa62f7368429040c91484ffa22fa60e389e1be865d511633e571ae8c1ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53211d62b79adb026c5b74053e1348184efe1a3c560c2edef30d0dc3f549a7c8. 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/USDY42373874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b741616a0391c8a2309c12a3faa1e24f816ec0782d71a9ea780ec96b1f187. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA5W2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3875bce053ebaf3f52065df08e26df5e6225936d09d721ae1977ce71dbf00b. 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/USA5W2300824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edffa62f7368429040c91484ffa22fa60e389e1be865d511633e571ae8c1ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDY42301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc107c56c567885b7593b244f888fc9cfa7211b19cfb95924ac5609d056079. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ2329813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ba9f532208e24d2720ae610962cbc948f231e7c4865b9a28d07c2654affb97. 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/USCGH2339432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc107c56c567885b7593b244f888fc9cfa7211b19cfb95924ac5609d056079. 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/USCGJ2329813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28088c69189f2db2becfc73d3b6709bed841418faa27f28b4d97bba06f45e26c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM92298105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ba9f532208e24d2720ae610962cbc948f231e7c4865b9a28d07c2654affb97. 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/USCGH2339432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28088c69189f2db2becfc73d3b6709bed841418faa27f28b4d97bba06f45e26c. 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/USHM92298105.