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 0x6f8fe8b2801a07b7cc1856bb2c61fa9e0f3fe72bfa19eec48f75742f6e50467c. 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/a1cc8b3c-3b95-4c05-b9c7-33e704a7cf51.json and https://artists.proofprofile.net/proofs/artist/a1cc8b3c-3b95-4c05-b9c7-33e704a7cf51.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 0xedb6a653987575cff66cf8c630a0cd2db3c4e24008be2df15f82ceef88da1483. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAEN1983548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87403961ce80ffb3ff4df18c5d0a61e1c6dca076f2c2557bbbeef4a798737aa2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1983554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba85f95a1ef3d0d15cb9530100f730f3969174c1509ce18041ebb0d66f532df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEN1983560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc439961bcb86353b945e4d4a35af975643c690783023559f977ff5e7422346ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1983581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a755720452f209d3fb3251a1d3a9afe2222ed3df102891fe2e857a2744dbcb0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAEN1983600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67723b3c26764eb3a20b41ed2f9fd58f5db3c4ef7975f2a2719c63f5cdc642d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1983610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35827111b3a36a6f07cf067ac7f3eecf1f2b5274b02c0222947b9a7cdf5b67e4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1983617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2354ab336a376062327b3e2d256bfb164a90e37b765d78dbb32a7d41c34cae0b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAEN1983629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4345cc0bdb0112c1563afcd0b825f079846beeebfced407fb16a84786c5349. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFT2124184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39e06c1d81de29b5f1209990ae1774734a2085da99ed65d6387f7d1baf06874. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFO2154276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0f4051f2f78d58874920bc766c3126a45575e8ba511812667d1808cdac18c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFO2154198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b9f04cb7c40b9daf6ceb8bee54050a25a17d20b36e0fab3986fe24b283591e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEG1925896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd987fdb6613f11c5b33368a51fc6aa05009ce21d5afafd375c2abec4cbd2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADG1702367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe19563c796f78daad237f803e6b38f177412ce6ef167ce12c87f6dc3bae28ba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADA1728373.