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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966096a5e6845751c9c9ca6a6ae5761f8a5d11ffbcf7ef0869de90cba480d7b3. 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/771fb193-5669-44e3-be73-97239dc2ac90.json and https://artists.proofprofile.net/proofs/artist/771fb193-5669-44e3-be73-97239dc2ac90.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d7c3dc076ba8552361e3a5cd678d26572ac8e73a6f890d63944746101976a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXA3V2409384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436564d0e96d355ad3b94352b3dfabb98f28cd724616fdf3ec5cfa26dd063792. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXA3V2409391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2985b387b6be0eb3e1219794f53c5dabed94b1586ef07af51b355256a24b27d0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/MXA3V2409386.
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 0xda689e2712b8276de7249d5d3ff1d37f7b5d4f5bf3c73fa34ba4161b51f306cc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/MXA3V2409388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f453a25afe39bbe477b58f1831808bcc9cd96e82a667eb626d72d0fef0ea6f0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MXA3V2409395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1a0f4f7e33d98fc5e3e33af7aa6a791b989a3ac3f7dfd9144b39c58b5d9763. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/MXA3V2409396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ec05eb6a703f19fcd516aaff5133e856ef42bb1bb95599ec5d7f0c7281411. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR2403376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20bd6d5e1f7acf889cab23e36225cc329dd47e90ccc97fb4aac2a76d95fcd47. 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/CA5KR2403378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1e7bf40dd13a26fad4b4298fce249c9182618ec85939178c7b8b29a31d6ef4. 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/CA5KR2403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9f08cd9ffdbc5b746e3d19c8996cecf86a17e0310d5918e87d4cd04c065466. 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/CA5KR2403382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3369bc9aa329c777bccfd3bd0945113275686508149eade47b837b8ea45293d7. 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/CA5KR2403383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa581e191a9ffc81ff8e1e142322d7d661f9d42b86390ba694bd0614f49b80f3f. 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/CA5KR2403387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3917b95588031d3a194749e4968a9cb400ecc525bfb711008ad2bfff763a3f. 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/CA5KR2403388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e67b2ab0df6bf6f5cc83ef7fd7992e1f1ed34a86c3d687b1844d277ecd501. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2359142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d755174e9dba393d22508539bb8b2e39b3199c95029ed213385a96ed2282b8. 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/CA5KR2358756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f2284eb682a03be620fc7ebb94a82890fb7dc9eac35d063c8ece541d9be097. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA5KR2358769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95bdc2a16213f369f815c58b35f50b1e5637e491c02f20f1ed76cd9113603d2. 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/CA5KR2341376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310946b015c4228a19d7ec9c748b118f6b84aa4cd778c3911d5d73dc61181046. 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/CA5KR2341393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eded75800c4d2f76417b17c6f4cf2729b96cb2a01112a994cdfcd96ca94979. 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/CA5KR2341396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a88ce14b159b87290a1bc67e98012afec60cf2816beed5a47d70ee54eb1f8c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CA5KR2341374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c40f72d87a4826cdfe3a2b96096464ab74a472616f35afab7b4666940c2b1. 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/CA5KR2285974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3d9c57e27717c1951467590b894aaccc6520fcef5b15c77f4712e01a557071. 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/CA5KR2285977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbb2e2bccb2af6ef62cf23abee9c0b2a4d8d71c74f181a76303801938849fbe. 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/CA5KR2285980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127772afc00b9a01d2ab75b98bdada9f3638531786b80d74255526c31beebbec. 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/CA5KR2262591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2624405ada21bfbccb681dc29000a31db0565b47f34df47336f0c3885c114a3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2262598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fca4620d8dc5f672f48d486c2b6104ed14ebd37712eaa69426510a15be9ea9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2262597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8de1a1d5f2201cceb972652a66d654ff168e8a887ee3f3557e1caa0b87bd85. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CA5KR2262604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d3df81b5ca37805b5b22a2694586246a2241b02adc43779f0fd7df712ff2d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2191780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312a1f44ad3af2631789718a167f828365832c129934b4973a76604b50350c6d. 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/CA5KR2185004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbd28705541db524b3660ed0bc81d7cffad00d5ee3cb60dd199a90b8c576fa1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR2185007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4472ff85d5082c06b0765940e86dfe4102cdeaf3baff84ba61f3de6d00da7c4. 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/CA5KR2184254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8539f920a63478b73c49c7ef1d548958d95d440408bd93052271347c304e6355. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA5KR2184251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b79e3ff51cbab449a019175bf1ad99778989728b49884d294ee0dacf472729d. 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/CA5KR1968106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a427761702e3fb2a1fe766646b804a6c208b0540408190c34df7076708c52e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZP7F2440970.