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 0xd3e4164b5afb582aef97e06cb6ddb459944f0255348c44a6bba6c9db0c9a638a. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d752425-7e87-4d91-aad2-016ffcde4d64.json and https://artists.proofprofile.net/proofs/artist/1d752425-7e87-4d91-aad2-016ffcde4d64.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 0x51c77e0ead537d6f50ab3412362c4ac34d6f910b5361aeeb28eec5c9e826f81f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SE6SA2229544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865507add108f037d1636644d5c8ae2ccad9decac1b25aa868bcd6cac78db2b9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:00:43Z), 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/QZGLM2344760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00146ec6c77770d722a2093c5d72103155b5d2424b3a79391e2fc072e790d82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XY2345401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2918fb9fcf7570add105afe0726d062afdfbc5c691bc9f0db6ed36b221bc09d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9K2450510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f74ccb18d1a8076c6c2221fc4426e8c6c29738e146dd64cbee1b74c40aad0d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:59Z), 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/QZMZ92503367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7930ed5c33d9f3f1e0c57fd2f7743fde0387a7be3667147e3cdecfab39c0562e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2509839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98ae9be3989cb23c3e9b4202eacc260b5be079d711d33f4ad2b7688615ae53. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXF972592797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcca8322ffa8fe48ce72446c618a8984be6e081cf425d9212c3d51cb32929646. 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/QZHN62397880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d445a22f6b389764942a7e029498a6e649f00badcc1e1ccda82a2bc96578f49. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGLM2393409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dca0d2e1a75ecda80acce2e612f7a2894621de76b158eece6bc2b3e1d34c3a. 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/QZW9M2412188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa913e15273480c3fe0ec2d51046bceef1eb05b9cda8b1367a1189bc76d6739ee. 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/SE6I32493099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230f3ccb13b01b3220532dc5a1814428aa24bf08df086e67e8e8326ddfb116a. 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/QZW9M2305914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d51e8ae20d81210584d1de23d16bfc814ee2c3ea9d5b36d2d66b99d06ace9. 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/QZTPX2304221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4930ce80402dad854d6f77e1476aa6c472830eaa246ee9222509eb6441a84. 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/QZNJZ2330994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0c3362e23e48e031c25438cc00c30b18815e734e2f11db8c2d7ca5c57cc84. 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/QZTVM2210180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203fa574486b1cb6310604d2c5ec8964952c67b34b3f5f55df50aff5977fb906. 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/QZHZ52219228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d5a28e37dec881ce0b542e60739ddc8fd346698e05edbd582b94a9f6822e50. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/US7VG2267314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fee04993e89074b7c579127906b0ef9c84561775dd71b6ac1ada09850a9cbc5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US7VG2267316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc94f714658525ada3550ba6a69bb8af2df12411e81c6b90121011de29f440fb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:12Z), 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/QZ5AB2343171.
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 0xadadbe457e7ad373147ead4b1e04f5b3abd5e272043431ba9313abf36b848d45. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE6XX2287763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5f921bbdb6c725875d72454916de92d097b4281635b11aac5731e5d353ad58. 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/QZTPX2418982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784de6efe7086d17d490fbb38de7ef6c5cd0a832c3315244cd3d511c7725eced. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNJV2234848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8020402ab524e1600d22f08968affdc2a59c68bf4b6ac393d81e73bc36d1f9c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/US7VG2267315.