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 0x013424c919ff31d8de1f9cf6a0017eb0cd528067dc0893f7463efb7f9474d652. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b0e1b40-c7ea-4145-8768-f23a58852b9f.json and https://artists.proofprofile.net/proofs/artist/0b0e1b40-c7ea-4145-8768-f23a58852b9f.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 0x8f22505fc92eabeaf5d764d32b2f85343fd61d455d8dccfedf0501580e560744. 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/GBBGL0902403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119174fd6b017bb1853c60394c45d98bfc6fa59ab8abb442f2d9e3cd396e80a7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBBGL0902404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4905177eecaf774478260cebec776cf41310203b208e77fe5be492841a6932d. 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/GBBGL0902405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae930b2805b6872a3104a89a1636f63c4e73e5381bac244730beec2972123c6d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBBGL0902406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb2802648d4bc797f332f6a3f6f503452d4c993cef5efd1887d3e3effdc2584. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBBGL0902407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ce571dce75ab0f30f79e87c02b10711041510afe610b7677ef31f7ffda519f. 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/GBBGL0902408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e40f9b3625f4932486597f84a8a30bc53436f8bb3178c776bba55f211e8f1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBBGL0902409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fe70abd170c9a0f3d667f7c91032d00f67103806fcd6243c2e3bd755e45e41. 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/GBBGL0902410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065ba8017543ccae74c2c041194139f354be4d761909d7e1b9e6e498336ac844. 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/GBBGL0902411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf52f085b32ff03ed799b49a448397fe78c05e8e2b3971f5802677f23764ad1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBBGL0902412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe132d04a2b8574b582b3f1354ba2eb83ef3a5f99108cb0a06a0c629701c3de4c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBBGL0902413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f53d6e0bb949e7d41641e039a884ca4fa72e918abe7208163dbb8951880a2a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBBGL0902414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe378b43f1566cc577becb4489c374186cf4b39b1bea2fef75a3b54f48fa63f17. 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/GBBGL0902415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8f33f9b8ad3f6a6fb40d4eed3beebd5ca890ef159cadd798f8eb36b2239e44. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBBGL0902416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9560d0b73dd04673b7785cafcdc731bc1aabbc416d3483f57e2ca357137234. 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/GBBGL0902417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef7a61ed13e819b5752d9b4ef7789774d78d3174d5ce5b3d5ea2295a5032663. 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/GBBGL0902418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8128ef64199efdfc7d01235a2f9fb22b14a141b45de0bc19d4e02bed68f843. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBGL0902419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b31e78f9c508bfc3c1999871c9dc4fac2d11ba1e20883c4c49aa2c1109b83. 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/GBBGL0902420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5690224a58c03c3ae65cc2596de27b358122e984c5034bebea38434178b36. 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/GBBGL0902421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09cc9c2eb48c4af770ebbe0b397fb9f2f1532cc375c90d95343e19dd5532d97. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBBGL0902422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49958c957aada9aacdcd1c172e0cd26755424ec26126c2995092c334fc107d. 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/GBBGL0902423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80fd8a2bc8eafff5430cb7d2f42f6234216cfe3ce74c54ae05b8e967a5f9023. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBBGL0902424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78beec778909394d94d8f63d487a5b1b51100147ee0ec8e7a7cee408beb6e7d2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBBGL0902425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d73adac2054f04de3bb89d7491180286cab1e50952dd12813d32a2f2640ad16. 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/GBBGL0902426.