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 0x80f0adbb0671108e1346a91feb9d4d9bbaaaaed6558ca6bf7b5224fb61e9f754. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b97482ea-7199-4c78-b84b-b49fa0d07a7f.json and https://artists.proofprofile.net/proofs/artist/b97482ea-7199-4c78-b84b-b49fa0d07a7f.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 0xa6e52d9cfd893eee70cf9629e1f3c2f29183df535db2dba59d60a0c108fc00c7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:02Z), 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/QZES82244046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2b2281901fa10bcbb7bbabae6557fadddf674de886c744e93d2e5d6754de47. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMBZ92277941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c3f2185d5df55dda6aad886b5a3ab130a5e16af3f9cc161972f549639ebbfd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4TW2380306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54cab08d3a4b837bbda321dc31127bf0aaa11ca541b18c7be3e0174d801ba22. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6N22252916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c3f2185d5df55dda6aad886b5a3ab130a5e16af3f9cc161972f549639ebbfd. 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/QM4TW2380306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2b2281901fa10bcbb7bbabae6557fadddf674de886c744e93d2e5d6754de47. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMBZ92277941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e52d9cfd893eee70cf9629e1f3c2f29183df535db2dba59d60a0c108fc00c7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES82244046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf49d5ca75f9c84dbea7be460f7a97af3f3289ba7278125f019bc99e68016948. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM6P42354289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf54be7cbd10ae9ac096652ebfb139674b017c77230847722533c2a81ba04c2d. 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/QZTBE2388532.