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 0x45584eae0ce288a383c5e2865d26c12146ad8106e0c4a0f432353694ad682b27. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e7a2628-3f21-4b2e-9c66-787c4766b02e.json and https://artists.proofprofile.net/proofs/artist/4e7a2628-3f21-4b2e-9c66-787c4766b02e.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 0x3c15c124dc532f7701e822f726cd2e26f426ede5001af1284452c76df6badbaf. 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/ES71G2332815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8978672c85b4d4f62e5ea00aa72677cf5911bf0ea26404eb57ff3f0f898974bc. 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/ES71G2402431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e7766e14de8a7b4cbfb27a622b8ad2ca9e6ec8d29de8ae1eeef1cd5c94df8. 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/ES71G2402422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18666953786c428c690d2c13856cafd580fca57551a58c57bf57785a615bec9a. 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/ES71G2402423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5972906c90d012845297c2855571923744e9848709d3ce0c69ad30f737dd766. 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/ES71G2402424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb560f81b58da3b787a2f8eac1acd04003aacf60f9d614fa4078f61e6e9871bfb. 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/ES71G2402425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d67ebf80efaf7f968d0e3a9687e404b4c052e20c3a54c7dd9fc888eadd05cc. 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/ES71G2402426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee8ce2965ee10b92b04b1e145d9a8a9ea9d33850a3a781799d5e4d297c28403. 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/ES71G2402427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48aacbd507c5ce168d69dd4ba9bc7c11c49bff8399cf0124cb46e6c33100bef. 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/ES71G2402428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8b0fc5c8bd6a7a98d09984a3f1cf43f5d7482e92e797195124625aa6976bf9. 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/ES71G2402429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9626fd77ab78572b5062eb25d21d940101840fe5578fabb7a7f0de4cf90955. 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/ES71G2402430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8978672c85b4d4f62e5ea00aa72677cf5911bf0ea26404eb57ff3f0f898974bc. 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/ES71G2402431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655af9e4434bcaa7dfaa1dc3044debba97a5836d0193727cea5054a3d64b47dc. 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/ES71G2402432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe414a74beeb697d771dfbd8c7220d1dce552acb4159ca7d86f61bfa897b275. 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/ES71G2402433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9d11511c8e2a922d9d6405a4329e909022050c1f4111915d2e3d50e829a3aa. 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/ES71G2402434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b1259593755656dbf2722bd67be21f5d07b4369fdc81cad7772a9874a7e56. 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/ES71G2402435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbc43011ce138a0a0e90a0855ecc5bc1f9c211ec940a9bddbedf842204d4e05. 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/ES71G2402436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca79e13454ca444eab5199793a6c180ad770fc45995bbde486281ade841d403. 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/ES71G2316267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14246e87013b8c76580f4f1016c90a0d8d683c76e404b7ccd3d7e9145ad865. 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/ES71G2402438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15c124dc532f7701e822f726cd2e26f426ede5001af1284452c76df6badbaf. 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/ES71G2332815.