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 0x0ec30a3e7169efa9e285399a04f139cf5c100664ae05c529efdad24520026fdc. 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/39752dde-2d65-4754-94b1-4af94293c9c0.json and https://artists.proofprofile.net/proofs/artist/39752dde-2d65-4754-94b1-4af94293c9c0.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 0xc2cab17dfe04433db3df026e43b19994569fd6ed3e721d823fbed82aeb160bbb. 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/FICAJ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483c3da37c648c4bbe270070c77aa661941df2077da5ce6fc16b742e7b6d480. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FICAJ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc84caa243fb0b25b851287e6759b791371b67b9a036edb7d9e9b608f495593. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FICAJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2676dc3d2749cec545986edd65cbe9621292cd44a3d34a453f16397d19fd6605. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:19Z), 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/FI9PF2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d2fd289fb964d43c0f728e1eda99ea2e9bf093961492aef85fa9813f879341. 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/FI9PF2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2612b5f31e87dee9e7be7b7026b66c0669b574c3cb403cd1b022f9d0d237cd9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FI9PF2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fee6674c72b9dd7f44e6d4f7303529df6d33c2de476b7da1268e15704b44a7. 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/FI9PF2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a1174e8ab4991a9d07f2a1fe2df6ff1c89dc20500a2f64f7175f8527b971e6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:18Z), 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/FI9PF2500054.