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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c6d2dbc66a17b59bfa434a7364c9a3c46e62097b8c646d5fab179d909a99c8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ec9ebb7-a870-4d8b-bfd0-ff65ed45b77c.json and https://artists.proofprofile.net/proofs/artist/9ec9ebb7-a870-4d8b-bfd0-ff65ed45b77c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcce0a0077802ed05147113522d6b6a84f57c40c3bcffa8ab698b286f2517d5. 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/BRWMB2000541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b6a392995a320de315d7f9047e0912736557006361a403cdcc60099504acb5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRWMB2000834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0551d163958e91a3c4ad865e17e654762c9d94e5d27924e9f74053ca0ef6f714. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BRWMB2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4549d93679a9c71590823ce691c0e0847f387bcbcd9efd023abae0de099055. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BRWMB2100239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b6213f55217edc74c2e2e2d6c0e51d1ff80ceabfd85c0eb31e5c0bb57f2ad1. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BRWMB2100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1565037e8a58188e115aa17d9097c0614df319eba862ec9732c51b504d5c542d. 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/BRWMB2200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a011c4b83b22b08ca9492bd6dd2ae023439547e1de30635ec0247392b15411. 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/BRWMB2200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3d4b65752758a80d5f6e35467f4cbc2024b5b6601e72b85019bc301c4ab47f. 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/BRWMB2200804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd047ae04fbac875c35eba18d731b1e074d841c8c3072a66ab6ac1d669de134. 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/BRWMB2200968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0557e8022450348d2705cdffe69a6a074eae7c5e5c095f6b5fedeabdd3e7adac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRWMB2300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11044beac86d4cdd502744fb11350ce635dcdfa9126486c7ab4301321fbd06. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/BRWMB2300953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd121c0100c00d1cf3aad9ad90e322f05ef95e3ea15c88241689ef8893e3b7dbf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRWMB2302023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3e622cf9bfcb5fbbc277a5be5911cd38dabd7ef1f1719160e87a324401731f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RUA491807402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67caf604d18a572547965722d8bfafd9da4aeccc3e6ecdfed05228691a490e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSJ31900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22695ff7392a3df92ce9abf4ca9a872f41babbe31713ff367c71aae069d5a1df. 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/FR2X42334238.