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 0x4dedfa6e4e0dcae636d4a67e98585014bc026f7ce53a5121ec74dede88447457. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f85fbe5c-825c-4af5-98a2-2b23d2da58c0.json and https://artists.proofprofile.net/proofs/artist/f85fbe5c-825c-4af5-98a2-2b23d2da58c0.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 0xffcd4dda673316d813b3c13c5291e1278b296555717f8a4a54843e52bdb235b6. 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/CAX1P1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d353869db914a3dc76fa1d581274c5b32ad8514f03fc4b718f176f65a5f16c1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBVPL1300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e27004a9f57429d9f4cc1228f6486853da3e2ba84988a73c50b2e8e0584efd. 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/GBSZM1300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a65dc62f6bdd874eba5dadca88517850a7332b07c0f580dc5386e7e93fbf9. 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/GBLFP1747902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad26d25262128c3ab3ae07e4332064fa474298b729db073e3be08009867a3170. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP1747904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe5efcbf06d86a43ac122c921a77154fdbae71f2f0440ff4cf0e90e2f46f7f5. 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/GBLFP1747903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d292e6d18b7231ec58cfe15e84ba088159b8ab6eb388b6dbc0a2918e4d1a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP1747909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944a3a637c19f667add4bfbced599ac9f54524882fbb56c05764f5dfe4064df. 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/GBLFP1747908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfaa4726759565c0a20f23da2b1241a728eb10c9cad09f11497d0caef7ce47f. 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/GBLFP1747914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1585f71bcef05e30664786efef990120ce1614771809f1f7f49041cbb525eddd. 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/GBLFP1747915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b8c1eb9be2e0fb973637764e1cacf6b40216263f62216a079963b961de318a. 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/GBLFP1747917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8db03f79ae22ff545891ee5669fceb50ad935718e08609db684a2825891a1. 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/GBLFP1747920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042060c58d19cbdf16b6cca76fe49ae688221e1020862f2f17ffc89bea9b729. 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/GBCJY1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3a908187a7fa23ba401ef696f22d6f5a0792fe5f65b3c7ab59aeffa7734d91. 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/GBCJY1200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25fa576f84642365320cf5cb8c00a45d76632bd8f7acd64787ff4b2d20c321c. 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/GBCJY0477011.
Critical Presents: Systems 005 - The Redders EP