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 0x20dedcc9de240f09fd933b65ea5ec29016d2bb574506a6b936dee51b44630e6f. 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/89518baf-0321-4bba-9254-ac72fe61f750.json and https://artists.proofprofile.net/proofs/artist/89518baf-0321-4bba-9254-ac72fe61f750.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 0x337396d4fc71fb3c68763cd9180861eb02d5d0e8d6107eebcd7efa80cabf8a4b. 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/QZ2K31700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ffdd85eac9b047682d652065907a2c3829027d9d409fd0460b44553dd8ca3f. 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/US4R31500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1de460e94b415839e94f53bfcd0055434e0ac8b8e3c8736fec0b4cc6b0b5b3. 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/QM7281539098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c440d4d090f2d457efd0a848f5673ae5d037086dc54e21c2523bbd9e7e76e5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:32Z), 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/QM7281540709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe271a2177027c5b0fa65afadbb30648c75cdbaf1f9eff4a6dbe303a2e2d305b. 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/QM7281540712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75debe7b4d44e1c9b50ae39319dc17c74903e203444ba243812d5d5adb2bef4d. 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/QM7281540714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a862c9005650498087b6980acd54971669f38fe34592c0366037bb818e22c7d. 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/QM7281540716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1a475760f0e6be03fbe4893496da662f1690164938064e498bf7237c57613b. 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/QM7281541113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afc98dfdbaf7211c17bc424888e31007124eebc3d033ac75701af69b3356268. 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/QM7281540718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25456861d4cc1f0e487176442b95bd4d42aa89fbd0354f20b18ea7838e98409. 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/QM7281540719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4a675bc9d46450eca3d573b623e60e45ca14230ef22f84c46e37b717643891. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM7281540720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d36809096f00b2edd44e8c17cefc5f08a3e49f775d1674f2d450dfec559a931. 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/QM7281540721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e023589e51d2f4bc4ddf0a292e8cec0ea086d093070824c0f712dcd5fca3628. 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/QM7281540722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e18cc5df698b93a2b8bef19c1de37169e1d82183b8ddd72d9c34257ad23c2e4. 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/QM7281540723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bbc403d0ff69d720b9c98c4193e7de0ba342ca9f548af3f748fb0d4b564ccd. 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/QM7281540725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694a55b267ba1d1d845e8a144342d2d7f12c0aba4406c0162669114fc3dbe2c3. 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/QM7281536184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd464315372c5b466ac6006744c072b4e61c1e70fb9dd0e8a2e10e930263fbe68. 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/QM7281536187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f4592d100dd31e53e42508fb95ccaa81bf071e5e5e205997c459e71036279e. 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/USEZT0610135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb0b4acffee38c5a462487e9013d6534d5b29271f175584f91f43e83992355b. 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/USEZT0610133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495fa62a8f0c82f24412081bfd454d27943d66841847dc5db8ff4dd5bcaba650. 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/USEZT0610139.