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 0x0d705cf4c7e0bd0fe680a58cfafb4374ca4b74048600e0919e72580fe37c7638. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed4af7c2-8801-4252-b86e-9695049bb50a.json and https://artists.proofprofile.net/proofs/artist/ed4af7c2-8801-4252-b86e-9695049bb50a.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 0x31acc274d25fb3c4949dce012b6a05185746f176eef0c02652d84eee7340f0d0. 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/USA2P2036950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a15ae14112368e8133ab02aba57c38ff992bf0b7796a70349cf4eddc26ef9cf. 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/USA2P2036951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109942c56d3e060f8135be11c6f79b44f477fe827dea3c4d01bb7d519d3362ec. 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/USA2P2036952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fdb6773546d2db5423ab5403f0a9a3c2769ad609eb597c6e9b1a37065c2783. 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/USA2P2036953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350ae4ee954d834e09405da94c27d855d345871bd2b7cd7862672ce35be1429. 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/USA2P2036954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aff5a523a1387b7e3dafdaf356ce2cc99ded117c9c9e360e63528fc39cfb2b3. 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/USA2P2036955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4002de4c04cd2200e08bcabd748c6727a965464dbfbf2438525be0feb0afca96. 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/USA2P2036956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62c423912d2af805188909f646daabcb0a7f60b2abfa83e8834e0a89aa141b. 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/USA2P2036957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c59a42cfa8afe95a97f0356c96a25b8c0c2c5cb0f4406660cc386ea93b3e6c2. 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/USA2P2036958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21db14e44c8b177a33d082e2ba5a0fbee668de10e4d5cbc6410b4a19fb827ce1. 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/USA2P2036959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2482e9831a958519750a80c69cb4d065b8346b1e3ea1d1b3778d2eb450c1a191. 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/USA2P2312527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c601686183943377e7d131a020a44aea89622910d7defd88809f5b8b9e9e55. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USA2P2312531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c5a0d3bb8bc5bde34b3fd9f9c832ebe6d487b18f23ba139511a248080ba5b. 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/USA2P2312523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dac9be574ead8887fb43beab6335fd00eaed6d9fb432d524ca33fe833f1708. 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/USA2P2312524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094216f0548d327c83c31c494d2012b0463b8451447bce012ddc93703920d5f3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA2P2312534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905cb4306a59303f8561c24eb03f1ca80d7da0ed4a759a58a4846be9d927e36. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USA2P2312522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6955464345379cec4f91bb223cbeab7e8e68f3087b6ace769d6f0130f7b53b65. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USA2P2312525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee60fe3644da4971ca080a23254042f333f83e258141f2a30e45fe7437e2b5e. 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/USA2P2312530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea23748442366b3a4a9c17d13954610cd6c9c6c4da822a5be221fcc0f669901c. 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/USA2P2312529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69e96f56faaba5d827e0822b164697e8d2ee248a3afcab3ece7fc4a29c1e72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2312526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb1bdde5ef25753bb03da26e4fc03413e75059417754d61c4e68be4fefdceeb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2312532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1cbba87e2ad331b4230b6dfac1aa31d5d2aedd0bd65002d3d59aa061bd4399. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA2P2312533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10940e8664ddad8db0344550773623bea479f03b55e64d74006f8d4738600ec7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USA2P2312528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb733291fae6da0b8c9622ce3b941f2a738b671addd8e3d0c01377fdde1f94a46. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA2P2232755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f7cfa4557fa5d8a32fcf82d30dd39e61a538ef3cc1e07616a2ad8d12686498. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2228545.