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 0x02aaf066de377f3a19a796627602cfd15e6b183796b9b9e5c7626dd0d3c11a12. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fac4c9e-433a-4d10-8322-88d626a7662b.json and https://artists.proofprofile.net/proofs/artist/6fac4c9e-433a-4d10-8322-88d626a7662b.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 0xfa9fc1369a03f27afc8249e31535e1b1fb2632f921c459ac1fd48aeed5a1a24f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:43Z), 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/GX89G2285078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5eabae5344f522e1b45ed313944d6a37e45cc737c533b555b80634229c52d1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GX89G2285228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbbec38df2f4f46b923f389ed1b3c0f6cf3e88911097592aa3e30a8148429bd. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GX89G2286935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e41835954b5d49d2ce12c1d4417a0edf937c07d778ec3a6e68e328519c86474. 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/GX89G2286953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ade45264294ecdc41cf4b5f2af3b9825206c88094cc8ddd4cfb44ab1cb6db6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GX89G2286963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249b646d7ac66b5472cbc7c6d54a76a0c2f8a01c1b35f248355023b734d394dd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GX89G2286964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1325a3cf07844f4af118d77fc4d9bd315a246e2fa0d403c1aa02c3ec08a95c40. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GX89G2287076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643b82e2cc14cca16bfd1e84b9f306de0dfcfcb92d30ae7be1cef80e12120a2c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:28Z), 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/GX89G2287080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87860a20c8d0a42b859112d7d8697e8aea1bc9d7ccb1d2b3cac1ded08f74f130. 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/GX89G2287084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86232ccd4b5c22a4100547189add4121be4d87ee30391d711b411e7a52d53b7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX89G2287088.