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 0x35800cc8bec56b66113a186a4b68c8c6840b8e35c879c1c23206224832cfb960. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a87f7809-41a6-4223-9b4e-f158c2bfcb87.json and https://artists.proofprofile.net/proofs/artist/a87f7809-41a6-4223-9b4e-f158c2bfcb87.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 0x5ea4450c0f02be88506489655bb9488c6cd493da9d29b1efdae6e96d31c33bec. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:11Z), 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/GBMA21908047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda69d853c065013c31b41c8c2e70ca949c95e08fc70b8d19fa2e7f1c9c0e3eb7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBLFP2053194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e08cfb78c9eab9a266bdebe2ea3c4f3bc2e0a80b1f2b3ec3a23faf97424d0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:55Z), 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/GBLFP2011290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e6f2b394daf7799f03604f4e71527074db9e2aa3970b51b03e6708cfa6d793. 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/GX3Q92355098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fe2f58460c5a291330a8f190c4e1430ed1e9e806841625f40bd148a8d93137. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX3Q92355103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76184e8ae1440d9d8095871b5f93fc76f2703757f47bdc6af43572e5131b8fa. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GX3Q92355106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52089c2a2aa8a304ef0f431362e06cac863336193a18c88708eab1419a9767e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP2491829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9050b47862a71705d361879b7e5a5d3d925ab272dfbbe891c13d9dd814275d88. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:47Z), 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/GX3Q92494621.