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 0x8fa359308dc633932405fd6369ff97e17a930c16887e62775940d1b7386aee83. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83e29d41-04bc-4598-bbb4-28ab70228711.json and https://artists.proofprofile.net/proofs/artist/83e29d41-04bc-4598-bbb4-28ab70228711.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xefb0201aa34d4fd0ab4a46a9f4df9f46086b24e722824f15cc1289259d0d3bfa. 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/HKC631606581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18bf66e033e03f75d22af80e807699786c0f82300fe8a27ad5700fb20a7494c. 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/HKC631506326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d17dba8f99ce985297163ab250998b2a77cce64bb272403344a8fffd36a996. 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/HKC631305895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3206ee0a5dd235f63132646cc2b5a479ad67d6bea8d862e4b97c8439c2a3776. 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/HKC631606582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea52259abcf68dccb0a34f603e919c7b9cc59015e1add4750977264df8d9c0d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKC631606606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc30062b764572d387546aacbb31a355687ae1235302b304969bd974a2f69622. 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/HKC631606584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3d795518d0422fe82875d73777987bc240b7a689625a6e528fb9ee4498937. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKC631606613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd83d41a128761b8756699e438d1b9d1c0c9a4c352a8c8ca9189335c3596502. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKC631606592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca23f831501b1f3c68a522c8c8aaf6d19d63cfa6ab35809d6cad22d0a29d60f1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKC631606593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44991eafd10b62c4a825ab58a3d1c4791a4f2402ff26405c93d3d89791ea1a8a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKC631606616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cfcad5a9d0ccc15898a1b745c64eb37794fbb709b5526dba2660501421ad47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKC631606595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d3d11d92f1eb35663d5e2b7069f4a6ed9c118ada84f4d879f1b6f436029fff. 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/HKC631305911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b5c3aa9e750f30e61a264e10f522435f18081af5edf2d9a9c54c98a7af6d6d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKC631606598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d6dbb79c266f2860d52bcafd8d4163d44f61f1e9983e29315da7ecb504b89. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKC631606600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6de75a0be21bcdfdb492327e8d4980831eb9baa0cdcb23e20bae585602282. 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/HKC631305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dcc066dc8918e1f898aac6ab586178b291fa57a7f7f65f1ad5cd36bb61975c. 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/HKC631606623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb8b5b58a0255c9b8b6a9e2c27315bc0cebd29acd4653b6601585219e32dd9. 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/HKC631606601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd4d34447e4edf053d3c2ce9c899c6c6b9ffc15d81d6e669c8305c4132b79b4. 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/FR96X1978782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd552796a59bf633a51ce2a582db30ad272aa700423640d46b845c0eca2ff51. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR96X1978772.
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 0xc607d60355f469ca6e6d5cb73a12973a69909c76efd4ea589d58fbdaad163977. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR96X1978779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb92a0f7d1b3d61bd25cb1e7927031dc12c753bf0954a71bfb25073eb66944e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR96X1978789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa68396a4a2c60ccd77d4c1fdb9a4739301be828bc47c542cc71115b1b7d04. 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/FRX202318908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaaafbf4fb3ff03fcc3009762f428fd43a95ec7df3e8de5e3b643bd05ddc4a5. 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/FRX202318918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34719782f0abba248c0bb7bbd1e424e42391e997b354094cbd0d4d917b3d9e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202329015.