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 0x96ca9e676603b0ae640eb427f38414b2ce8e426aa907daab84c94c68bcde5af5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c36f3173-181b-4807-84ec-9a89f9798db3.json and https://artists.proofprofile.net/proofs/artist/c36f3173-181b-4807-84ec-9a89f9798db3.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 0xfea882ef1030e8b7ea1e7221d54d7bfc3ac516b207419d5dc34550d46e16cba1. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/IDA832501676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15160dacfe569115ae3b10b68337c45234a8b68ed37542318dcc41f4025e2eef. 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/AEA2L2149114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ef3fc8bbfa1620fb2428a46d27d0bb15028bfd85d8c12017940ddb79f3308. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AEA2L2153294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00a72aa4aa5ff696d27577450bf0820571eddfd280965bc7c1a27071d00201c. 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/AEA2L2161770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0fbee1e0e70d46ecf22bd69cbc43c1b86fc715011b33b036e4dc8be4da549b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:36:24Z), 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/AEA2L2161769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311ab574e48ea893de91fe125594c3494592e49a5cd4e35c09a69a4e58128eb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA2L2164295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b193325b3392d0b3929bc96e785f8a21ca607ed5ce6a657df9ee0a1a70b482. 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/AEA2L2166664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ee86031e3dba7e3ecdf55545f5cad682a5b32abb711f17c92281c4cedf5d2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:33Z), 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/AEA2L2166762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a2e015126d39bc794ce38ee6927d6b1f6963314fec313385fb94c8d4b15289. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:59Z), 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/AEA2L2166763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5228e421a1b4e0e818cb588939906d7f75845c47e8bd96b3a4184f4f7db659. 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/AEA2L2166665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e233b432a217378014f59013cda025ac7cc4a41e3693705cd059d5c198e072. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA2L2166666.