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 0x84b7b03efa6734ded12da8951317594978e824e344710fa2e0194dd961e7f0c3. 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/0fb41ec3-267e-4966-9790-e2e4e9301156.json and https://artists.proofprofile.net/proofs/artist/0fb41ec3-267e-4966-9790-e2e4e9301156.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 0x120d977875e6ed59962d86ff818b614688c8db678a67ff92f3fcb78fa94945f3. 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/QZGLS2457785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe681bf3bef523522d49a059928cd62405881510dafa3362eb8ee029b5a387738. 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/QZES52529815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0baf754dc491a1f4b0c6ece9983f2840a9d7246afeb90d18c0a70a1d5027cf. 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/QZTBF2463613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5902823db7c45561f30af1610cb38d1f575a61610637987ec77aaab25ae2ae0f. 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/BX18K2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf37893260e865e96e61ec4555a6f6903a6d43fd1847607f3df97ab4e4f8dd9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BXIV82413318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7043883318c3ee43b29d4ae25e7d7e178ac89a1ca2e7a650a552d6c7ea2d27. 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/BK1P72400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb44be94caf8fbd3d908f44fe7dd8e45023239c06679f2367648626c317a9db5. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BCFCV2400493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22866e2a5cbe94c6557d178bfabfe73a52e43440d0b2b8b15f7a76bf795a2a51. 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/QZ5AB2459192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c548a2f0eab7f73d382234bd934b7ab5ec92ed215dc13301923b648a7376a6d. 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/QZ5AB2459236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a1c83e44bf3b007cc8cdf85f7775bea526acffd1df5caa65fbc9d77691cfb4. 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/BX4IU2361587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1f4d4d5b8fcaf6d38470485bb0eb0e029f465782d326951eebac5f5001f1c6. 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/BX4IU2361586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef75a8af21f0fcef432ed454c642ae8070b08dd8f48d9459bd7da0049d494ee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTPX2397185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7490fe2e7c3655afffb61904dea20fcc12aff403f43b517041acc61c21aeb68b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXCDQ2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4bde1c0dad438464091a3b51df84b5cb34d8433cb9f85017e1383c30e00499. 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/QZNJY2309733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568a3dc91f1699da149ef4ae5b3ffc4896d088785f91731a157807444509c2cb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNJY2309735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b623d4fd4de92aef434ed026d155089c6c72829cec2582b2f02b0ff8af91e7f. 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/QZK6N2339613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc20403a050165b001fda0a6f042f2c073939695da1c7e4a39dc8f3b934eada. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6P2390352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaebefc2006aa308c1292fe562ee7b588ca54ec94a32facb374f321dd0defef8. 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/BX4IU2312858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b513dbd7d01f4d47d702bec8cf293393690b2b3eb4b995bbe698e4853a89e. 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/BX4IU2309813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe597ebb61a873ba2bb064b193419714cb355f51ae194a12063187e51ee2f7d23. 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/QZW9N2242723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aaa3cd4c307fc27369e6d4f8c1503f77ec94b6c2125df8c5a44e88ff1af8bc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZW9N2231198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe843eebfd53187581d86cd4c07fe119f08fa670a8ea14fc067b625155caf0291. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZTVM2209304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345e58497d1f79e9cb477e0027e70a93151183f1873a3cf445c161f1b49dd373. 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/QZTVM2208858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df40f9bc331d2faa4428dffa58fdbd3af99b1c53d9c260645b2bd79aadafb1. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QM3DF2282616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3a8ea22815cd8b418fe39db7a7595ed912cbed0ebead784a0dd472d693068f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZHZ42253860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4526bb09e3b3d51e7a9e28543de2148fa27a0aa1a97aee738dc8c75ca1435. 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/USANG2204770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51761ca97522da851d343c8dc9a71b2c2a2e479124dccf6aca17ac9d2a7af6b6. 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/QM3DF2252559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03430ab40df007b7d333a9db6af7000104b19638a1e7d1e169bbc110ddb7dbe1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US3DF2218111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7490fe2e7c3655afffb61904dea20fcc12aff403f43b517041acc61c21aeb68b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXCDQ2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff13fc84a936936a898beb1935d311bf1a9c1568590cd3fd6aef6ea5f3d3d2d0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BCFCV2200199.