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 0xf25e5ac42bcb5d04043dfc2ca7860ffd9ce23a64cfd25c210ddcd5ce28642bf8. 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/b106954b-0677-4489-b06d-da592c3974ab.json and https://artists.proofprofile.net/proofs/artist/b106954b-0677-4489-b06d-da592c3974ab.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 0xb48c59aa641e104bed6b9344bdfdb84b20ef7432732c9451bc2e3b774c2fd87f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZNWS2312907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f65fcae1e5b294519c40f4d4212751700216eae8ae23b8001be2e625c1a983d. 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/QZRP52307933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d3e9b125e23b86fa717e115653cc01417bd3c69423458ac28d526967ef1529. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTB92317462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ebc34f3aa8d4c2222d245e018e86328c24780201ce28bedbcf5a0d9470a61. 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/QZDA52440175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea1ee1c16e40058478933a958bd249c4b27d4e9b7ac7c90dad60d456f39a3c7. 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/QZDA52440176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389cc2b2b8883eb768d9945e1b1255b251eb7c7432f271cf9a61ad1c601c97ba. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZDA52440177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e65b59083a58a03098d4fa10d0a34dd415ab29beb1cc0e8e09ee6329397a85. 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/QZDA52440179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db4c502160a68c7c571684d715f6020ae4b6e03cc4d6e6b056d077a08c51eaa. 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/QZDA52440180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a86589ab7e6b0da1aff18c353f1b4ba038c69c0ffd308a2118e542b8834a4bc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDA52440181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd99eb9318d8387da80486e2606bf1d9f46cc074257929e257438b9cdff1a76. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZK6H2401766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352e2224a80c88de9faf23499c5c9ceed66a4af76279706fc470a3d45a22cc6b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA82519961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179caae34d9dc3a8564d3b861c38a46f6b7b025957c6fda3a72420f235632920. 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/QZTAU2381933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098d2e86cfbd2e6df12322d72849691203c4055d9f35cf661854c0c03f1555cb. 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/QZTAU2381935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2563f85c91aff82ffbbf8e7f760055870778c5431aaefcbd381aa246ac772541. 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/QZHN32472912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2983432c28f208d5abb45a7558f1ccfe252385f567a592e4700b2798a98e16b. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZWFN2393393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4312ab9129ec24da2d16683ad12605d4ac5565231f975f2b32f421c0e427c245. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CZA232300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edfdfb2b4ca6175345bd40c3c1c2bedd5cd3507de58d086e498c34af158b650. 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/CZA232300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5f9512d6f7e6d065514c94c3e4173362f2976426e6a56c3099f2951d84e5cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB62412534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b3f997e566909b72f85e776ff06d0eb7fed611a73d357512271bfafd2ca7b3. 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/QZTAS2459676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa377b6fc48c6cd4466b8230138a20d06b1cd2e5c701891a6e8dc9923c540782f. 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/QZTAS2459679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6d79eb03ede4a3a3067c7a3e94f853593b326322e750e169fc76035323156b. 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/CZUM72301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcc49a223e693b087ba97d8e69c0e5d5aaf17fa21a31383f76bf5b765cf235d. 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/QZES72341602.