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 0xa166554df1708159e7d9a112e8c2a8dec0c7f32e9612eefa47ffd2ae551a51f2. 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/2811b99b-a47d-4925-a255-e5f6aea2e79a.json and https://artists.proofprofile.net/proofs/artist/2811b99b-a47d-4925-a255-e5f6aea2e79a.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 0x590761fd42f3a7dfa66df94833e10e21650d54f22fb5229e36d677eb3a648a22. 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/NL7JR2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72af0aece5f3f10b413df58cea327c3a73b4edb87ffa16dc6d34f1f25660ab72. 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/TCAFX2139639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfdf51f43a013c3d82e333c2ad0dedbb564fa9d81a7714f7f9d27911baae186. 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/TCAFU2123372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bf7dae6634696ed955ecadf2dcbcc34c4d778ba24c57a4383dc7e470fdc904. 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/TCAFX2143502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c70e728eff8a74cb9d27ee0c9ea0833f9ba48aab9a7ca76d5d70c92494c970. 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/TCAFW2152398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ad5d9a4fc44fa83d9dbc2ef695a0c97acb1fb10a82acb5ce0699137e1fa54b. 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/TCAFX2143521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3e3f2152f68cbb3fe4238fa7a60cbc0dcfbf92cda42d611b3cad96ff54e890. 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/TCAFX2143532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82131856a4e2ef722bf59e17eb1493c03873846d3cc5f60f47dbaac9af4975f. 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/TCAFR2179202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cca4d04aaae3a92891d02720944d093c64a2b9e917a85c179bd517dbb2ec08b. 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/TCAFR2179593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3ffad6563c3edafd83011e7be0edcb04b642c399a42c17a3c21ff2dd343b9. 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/TCAEW2090538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ff4252912765303209ad4199087efa731c5759c61429c5dc1dc1c3f0fa8f11. 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/TCAFR2179625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4003afdebf217320325ee3f3636030710b00ef30c887ce77251d55e9507742e. 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/TCAFR2179654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153785dfdf4f82aaa523aaf0b4f9713295444819a295c5d699cfb6c2b147469b. 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/TCAFR2179667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61047839c9af5c9029a4d77f2df8a5b949c05fa2ff280ad0165335b76799b140. 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/TCAFR2179679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaeaf63f0b406b42cfa54f98a3057765acd57c80c05f8df129219d090263627. 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/TCAFR2179683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3527cef9e9d7e5cc7b20ed45d9ed1853d26871aeab426389ab72f8db73cc57c. 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/TCAFR2179692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf620749e8f44140b2c4ce134a9e5b590cc3b307d241a7ccd74494e907d1c2a7b. 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/TCAFR2179706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4543199fb6801e54219495adee50fbeb1f8c501cc7d1ea9f1d64d2e826f6b4. 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/TCAFR2179714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aabe100616c2e289a904fd82222e4188efec1e6f44599455435787e0b5f6ab7. 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/TCAEX2080128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c78834bba7fe977cf946ad2fcb2df72c92e390b462f38805214663f1c6d97. 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/TCAFR2179740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69b555606f0529e860a8ab65e25dc80e857d0b6aa563a523fbceb904f7cd04b. 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/TCAFR2179751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d13fb6a14626e1d61264e3848b89e571e1b62880a14039cd82b87f82d54370. 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/TCAFR2179762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5e46593aff8e9fc9217a54bcea4cc1c3361aaaa9aeae6549f09266513f7997. 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/TCAFR2179768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865529248ab187af507336f16ef0812d58b442e4bf48adbb4c7393762aaa0f5e. 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/TCAFR2179779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99b330629f06effe48ca106d96d1d36a8cce0339a91833c2d7026aaf3871a7. 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/TCAEF1998317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe885bae7a02c681cbdb4676fdd72208e46ff340cdd3a16c5e522cdd11efc15f4. 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/NLG661800530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb7727df03aa5e11ea461a68f84d02ac91b9b09ca282a7d9e72b462dfa4dff4. 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/TCAER2031109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86775b03f0ea7b7db0216879ee47a7442f02a0a0bbbb1e9eb18b89f1379bd5fb. 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/NLG662000593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25f65c1160f63e55bcd19713a8e8fc6ecb7533c16cccfc121b5c4e8c3ada852. 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/TCAEJ1967253.