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 0xa636aa16cdbdcc872347fd5165c1b624a50718c4d275182e806a18737c479141. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14961b58-6c52-4272-95ee-adade88ab0da.json and https://artists.proofprofile.net/proofs/artist/14961b58-6c52-4272-95ee-adade88ab0da.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 0xbdd558c0e3668ecbc74e3a3d1747a2c02aa478909c98c048d4916e9dc5ec5b1f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:04Z), 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/QZTAU2135568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a33ab994b18591740f68a8756b6fed968b84379cdb585a2541d67fd068f4e4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAU2135569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895efcd04ff72fd6142f23bae39310c14019131c141185c208fa15e373c62665. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTAU2135570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e9af8e4e5afe4e187af67b127d7b988887ec3f9c65a6a8a1e3e3d56458ab76. 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/QZTAU2135571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272b7fb7bfd5df2188a6a396d02771db628dbe285b962372453454b4127293d. 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/NZAM02223285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25aebd40a2a7f6224e546f01939f0cfccac21713f5c083bce21f6df86363f43. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NZAM02223286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444e9b9bec95aa726e03e3211af387b8fa6ab8a646351b29092c84c23bb485d7. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/NZAM02223288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4698f7030a1bfdb5e7ef319789f8253e4c45f6dc5ed3e86f3ddedf9b36428fd7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NZAM02223289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b9cf9435d9d639c04a1a2425c8301f3b780bb3d0284d047065c75c4e4e9220. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/NZAM02223290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8054679cb86fccd6ade3263143b1d00d63728a1f1bd1c3ec124c5e8b41aec7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NZAM02223291.