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 0xdb4f9a2fdb054b43b14a5242002ff44db8aa6ad069c5db0d5d53bc72b47db640. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe143ba5-5bcb-438c-8d7c-92cc8ebc73e8.json and https://artists.proofprofile.net/proofs/artist/fe143ba5-5bcb-438c-8d7c-92cc8ebc73e8.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 0x0782f1e286dcf6b6db509d262c783c55d8941573ebe6475bac7e84fc3b5ff5de. 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/TCAHE2353575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c489dde0cff861e361fe474de2cc1f40acd5cbb32f6372dfc8078dad37052f. 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/TCAHE2353580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b2eb95a72d45c51ed33ad8fc6e71d0f8709620f91441bd9a8b44ab5881b119. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHE2353583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f019d70e7a8cc37e12840ee5f187ca6389c18ae3070fae66a80ecabf1b0f668. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHE2353584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6655fe79c630d937a63cff196375b59fd6c48b98779742781fdd75337b247696. 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/TCAHE2353585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a18c30133c417e25730d527deba33b7c647262704c8da9c765f41984d4ddbab. 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/TCAHE2353589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2438c5888910112d186255d53739e82046992d53829a76eb40b16e945423e8. 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/TCAHE2353591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f69cf89d7ef28a5f737557a7d618af3ee600baf5dcd592c16f8112397cdc5a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAHE2353612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa31edd95f52ac59c2492a5f3f6b2acdb4fc3f1ce2fa6a528f83c5201e890723. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHE2353614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08c6afc3297c9d66c69986f1edf3b20d35472916e9b6c3b8927c869cd44d568. 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/TCAHE2353616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe27db9338b762da45ff99e019a86bee6281f5d7b8f2f387f0bdbb4ebf2b779. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHE2353617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3242a632f0c550b339375bf38e9f72f35891cddb40bafb9f6adf7d68eb810a78. 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/TCAHE2353620.