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 0xe136d9d1ec76b0096255db759c92aa5b821ca6de37a7eeb1e218b1202289399c. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85cc683b-3123-44d6-bc54-d8d7790e1da6.json and https://artists.proofprofile.net/proofs/artist/85cc683b-3123-44d6-bc54-d8d7790e1da6.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 0x10bb66b5febd8dde5d8d145812b0aef084770f0083630244fc53eb65357d1deb. 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/FRO060200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8f0c7470a4c9ffaf1e4fa43b2f296c348cd7df1d168ee73b892b538bae3cc5. 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/FR4LO9400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0f5b0b4ef160aa06114bfc934eb82c952c7efe116f774e31101eb87666418. 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/FR4LO1109330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36566a7f6562cd007dac00e2ff07c2b03cd14b47895e46844ddda1113750185. 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/NLE870639001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b560519de7827bf40b6ffee575c64ff76391a478454850037c7630ce71182f. 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/NLE870891218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a68c77b8ad4e56087745765119a792e475260f94b53853611575d72436455. 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/NLE870891219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae823d2e0f39ea813b2240c96d36188e8421542dbe6e26f7ca43956595551f5. 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/NLE870891220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d5c9fb09f487795099b9a6953140c84670f14ff14a3ccfb1b027e2ad99a99. 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/NLE870860183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8ebf24d30e27f116becaaeed0d9ba4097cacc3a77fd50488226e8acc1df1f. 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/NLE870891211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab1a678611c73794cbcaa8512108984dd83bac1a2cf3a6fd18b9aad5912da23. 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/NLE870706002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5757b9bbb1de5cd9ecd605c44b4c4d35c174991d501e09506a99020590e95047. 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/NLE870701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6395e5090f45aa00513ebceaa24f752bea2caae93d459b17aabd7fe23e642f30. 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/NLE870780225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23568b7796aeacbb17fbd1018c82bf6e6e065c4b3c36e2af8599951febb5a4db. 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/NLE870780227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb08f3b529c65ee1d445e67b77bf35c6a1e8ac92841d3937f6b6faf4e49fda0. 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/NLE870780231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d236eca03d06085ee92604d89fa633e577e715b3d23cac86f19873ab1b3faef. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLE870780234.
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 0xed9f36a52270eb6953a52fcd4e3d8f27eb6fc92707ea0d2749a037ac57c820ad. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLE870706001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a09a3e776a6a8cba3a037fce95f81793a812b313e9a7d8e4e51040f2602ce. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLE870780226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36bf04003782e0c2c1c8a2717d4de065c9f4e9ca7f4a8e08b834ddd992f9a5b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLE870780228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46e3ee79ad2ae2f4a393b5cb6f724bb1bd58843fe2a982488070e7dc3ff5a7. 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/NLW2R1707769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139622a26654f7de460a4cae6b09294fe00558379189d3c4d6d589f0f5915c41. 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/NLE871434605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9930ba2402db403df0521bf4a202dfc70c31e27b83475b243fd226311126127. 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/NLE871434612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2313c8641f756835e5039555817178ae1b5194d272b95e48f7cc82c548f9c8. 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/NLE871434602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ec3bac3c765d0cbf280fa81cdba2052b4c05099fcf6a8265db913f1f9be4e7. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLE871434603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f3950cf435bcaa10352760be0860b14cfda64d98145104b43c79087faa66c1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLE870891101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b41d104e97e7eb32abe52fd75d216ee056d831dfc7c42b232afe856240f950. 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/NLE870891111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443ecc4d2cc4d2b632d6b2c25584a51f79cc88619ecf0c3827b380973d037fac. 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/NLE870891102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291169582b679210f209a3342135043a340ecc7ac253038c45265e3fa1f5b0ea. 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/NLE870708702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958d3198add6fdca66bd80279abb14e106b0052a1aad0a438a48df5a72dbcb83. 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/NLE870891117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2629856dea4d26df2b2812f07ca3d0ff6a6883820c0fb43bdd362b2c7254b0ec. 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/NLE870641601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe341addabcd1c34b242e89a9bfa873ac78da6294f5a4c9102cddbd7ff80b454. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLE870701104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafee9df663779b41394504a72e5b4a3443f851a1559fbd3843097c3372253be. 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/NLE871412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745103fb0aa63f2de4f41afca552a899c727d97f517265f2c8b1879cd0a15315. 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/NLE870685701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5640588ef9ebe9b346bd0e4a5d6cad554ceb46f028ca31182bed3272a337bef4. 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/BEW130610290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bb66b5febd8dde5d8d145812b0aef084770f0083630244fc53eb65357d1deb. 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/FRO060200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8b7d8f8a256c3ce7f800516ded52473a8249fa80bc8775b4294a1d2eaa04fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRO061190012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9b24eea19800d81c06fd8af8a9fde3014a21f6a07b4d598cf59c83b735414. 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/FR4DZ0800190.