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 0x2222b384fcb865e023a06737088ccedd56c00dbd5df091f230db2883eaeb3cc2. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ad1779b-4206-46f7-a87f-1d1301ab93ff.json and https://artists.proofprofile.net/proofs/artist/7ad1779b-4206-46f7-a87f-1d1301ab93ff.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 0xae447f9ed14f8d0df32b62e5112b5e4f4bba646e9258c6b3606973c4f4d04fa3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:36Z), 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/GX66P2022003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ba2ab73dfe0542ec52c67c11b1a73a652d4498bc838fac514b227aa4278f3. 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/GX66P2022005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae80c12cf2b06c98646bef117c0da525102b775392c527ae65efa14e66b4afe. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:40Z), 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/GX66P2022006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca78fbb8993d601a05d21f4efb49887fbcbf66b615edfd86ece985dcf0c71222. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:28:20Z), 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/GX66P2022007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa868627bbf8cd8936169cb7593983b47e7a7b8a81108f2f30a15f54f4706cea6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GX66P2022008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd149927db18a581c50de8efdd68a71213bd3520782df8013c71e4514b529621. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX66P2022009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ba9d7b99e1b5cb0c884b8aee740dae822382f61396f777ea38955b6473b73. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX66P2022011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3396a259defe748447ec48f20916c99e2c9ed9db4bfa3f5a16b5d3007db789d4. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/GX66P2023001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058b8831afeb2d26a3ba763727d1bb20dfaa5ece3fe18c758ce7401463bccc6. 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/GX66P2023003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7ac2e31eeeb9b4fe92e399e983bac885a36979ce18ce63bab986f2245dd09c. 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/GX66P2025001.