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 0x4a3b2c1be6aa85731a9a58ee034a681f7c2fd2a41c20c35873dcfec74ab9e780. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94410841-cf74-46ef-ad72-9d56095ba43b.json and https://artists.proofprofile.net/proofs/artist/94410841-cf74-46ef-ad72-9d56095ba43b.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 0x84914d8c0487323198f033689980277e0ae0c8020cc591da57846d03b07c878b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMHK2339279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d73063c2c89fc5076ae0e628408e8560756ee41e81ce1f10b8f8270031821. 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/QZS632309802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2e4dce091650d440312f05709f93519f837e291dabb6ad3bcfca7e1b939e2. 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/QZS642313077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57007573bf2e1eb2e7a8e7dc7a0475b19d2377aa0132585a4f9afb3846f6d4d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZMHM2326600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef49b71f97f514117cc80e006530a895188fdd5c9acd73da47b91c562859cbb6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZS632357582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e19f12d4c2e145ab8755b09b207baebda41cf116b8cc2ab3f104f34a13e8911. 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/QZMHL2341068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de15311e2d8c579eb20d30d42b8ff4d46ef728018e05be0f83374fd8db17561. 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/QZMHL2379139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63734a2292c6a7636ab7b431d3e246ff348e460f16924f915803ca3ca353a82f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMHK2394113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8928c7d1e0fcb0c5a76045304bff1086825744b3b1b4f996608f0212dc87f8a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZS652325999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d631b64a20520d77d69014ca31e81763c2664fe8346df770942c4f1b58c5b70. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:03:21Z), 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/QZS632348778.