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 0xe849f3a557d81e766497061c8391b424fb4ec5fd87f6b0fb0cdbafd50d2f612f. 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/1d8fad14-2c2e-4e4c-b0ff-e54f533a239a.json and https://artists.proofprofile.net/proofs/artist/1d8fad14-2c2e-4e4c-b0ff-e54f533a239a.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 0xddfa3f9ebae726a66848ec565768b94bdb990758d44d0eb71c8fefda9c00a0ae. 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/BRPHF2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ca818335ea2189de29f51081452f7015f4ab5f3e41d667d75097aa3691e205. 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/BRPHF2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a8c980b0d3bae3842f60da35e528453ee0227c9ecfe1840241f18421e482b. 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/BRPHF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba63586ef20efafc934e21cc2e9ceb315f3d03847f23453759cc0ca6691279c. 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/BRPHF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654866462aea02806a1e5a813859519d132720d2db3d15bc18ccc628b5c9e7b2. 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/BRPHF2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f56cdf1fba147c1d203669d2b6584a637859ca1c0e94ea669f8901e489059b. 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/BRPHF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14ac735b70f3fecc44ebc9e3d350e0a539cfc98072520f7f60dcd7e2e1ce11c. 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/BRPHF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861105ed950e814c7ebc6f7a26069e4aa07a8555a421742c5638eebb6bbf60f2. 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/BRPHF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb359881aa74b77bad3426176f9df2af345fc515cf5d02c1a53839b3c35122f9. 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/BRPHF2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055d75a3ed97c6132dfcf81c483764e86cd354def43b5f9443cc6a3f437f09d8. 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/BRPHF2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e21186c33f0d53d0bf1316f6cfa5bd75d29cc4d8eb83f2b7a2aed1dfb28297. 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/USCGH1641473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25fc57596c22657a6b6bd15f9879be80a8151d3e967821b7ef8f90a90fa41ec. 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/USCGH1641474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8657928a86532d9f5fbfea7b8046d4186ca775da92a00da3e9cc06ef7e12a71a. 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/USCGH1641475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9f5d083fc1e8ead916f420d2a0295f5db5663ced968a33470553419a3fd2d9. 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/USCGH1641476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cddf790ffa3bbef6c07ddc1d8883bdab98c93cec309dcd363483f04169cbdde. 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/USCGH1641477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb425181ea57db10ee697aa74095170bb158631c76b3a700cf45d86653caeb2e9. 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/USCGH1641478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182dbdfc627afd395c6318a8d40ab0350545c0597c08c7d94ffbfc0987b3cc3c. 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/USCGH1641480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4404d93a9922841b044328be1cb7a4ed6c160009ca43557308a8416b8d0176. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USCGH1641481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98f16face6bbd0f37299f24da13ab5f4617e04bb8827a60b7bb83b4e89bbdea. 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/USCGH1641482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf99e5cb1514d094e01730130b01a15b2173171f901f80175ff772975a2f63fc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:42:52Z), 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/USCGH1641484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e93ce0bc3c755b9e5e69246b1a39098ff0e68a3e6f042700172b718b1ac855. 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/USCGH1641485.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf682d42f7c8c746e3e75a4912dfc232bdc169c146da63c9bead9ccfd1f03d9bf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGH1641486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82565502f43fabb2177c997be88a77db99bdd35f33cde1d88916a463a1f6db77. 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/USCGH1642453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd47ab6167737e55183eb2f33e48d57608cd3c49795efb015190f760352e83. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:34Z), 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/USCGH1642454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f7fc7b22cf703860e00fef75000c07c11b4a697367f9b161f20c8b1168c8f3. 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/USCGH1642456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0590fe6e77bc63c25a999cc9f5670a344e93551c83443d4b7f91e5eee37df81d. 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/USCGH1642459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42331dbc4fd949a3ef47c69a7e837ba67010ee52d8f8ff01b9bc4261617f4c63. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGH1642465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7b7dd0997b8323c4d4e1af485f703758a3b11a9e8fd1c32e9fe56fb9cb956. 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/BRYCR1900006.