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 0x39922d5298c24aa732a096b4c8ae9ecc05f4007d5f29e585d4158ed341696784. 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/7411ffd7-6f7c-43a7-8b7e-0b7b468afe22.json and https://artists.proofprofile.net/proofs/artist/7411ffd7-6f7c-43a7-8b7e-0b7b468afe22.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 0x488531c405c41cdfa04088081c90f26e1702525fd64d2b247f65455382f145f3. 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/QZZ8B2368616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0938b6acc672a1485a181c7aed43584e9fcba613f03110bbd2d818fe8a815eca. 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/QZZ8B2368634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6af2b6d5e715cf77555750e64fe3bab009a0e687d13d24cd481dbe2011b168. 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/QZZ8B2368646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f31a272647009182af83b8cd943db1c580411160551fa913360fc1abf6129f. 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/QZZ8B2368674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccfba8a9eddbe4d38cf512944c798c8ce289b8756182626650cb1d8e03d5090. 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/QZZ8B2368686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee1b5c53b03046156f340eecbb4b19cac3bacfb2d4deadef006adde3c03734. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZZ8B2368662.
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 0xc7c5a3329669b3a8bd3671a9f86e254be65c65dd8d1a3de1c8c95b40fae38404. 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/TCADO1817259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c136577583204d939c7429f53addc307204566c1484d490ddbb99536b3f3ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADO1817223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c56ef9bae53522888207b9255229bd9ef6336aa7ef51d3bbb6f1a6762776ef. 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/TCADO1817237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948ea5d97d80c1082c06d0523a203b006a4fabca47461920799504312c80ad50. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:33:37Z), 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/TCADO1817252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03b9c02a07dd6eb7785243af1cbe54abeae53c80b8cefe8d3da8e86606ede8. 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/TCADO1817184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bd51959898a6d7079060c9dc8179c6abe40dfd4cb1a3a769f1f3ead08d090a. 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/TCADO1817206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41868a58861d628a2cb0cfb8e9f80d0cdc9b785237abfb69de785884e246524d. 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/TCADO1817248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d964a872be7c39ffab9bb8f76eaf8de8d732c86e5167ae1e5a0d43b87ae0eb8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCADO1817242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7173bfbda9b277c6b05b9e5e063972b86fbfa92a6d88fea74a58f0383a3e3d. 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/TCADO1817207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4927a0fc171dc65d8d0aa1ac993dd6ad988e3c45697cc4176a7ff594e21d40. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCADO1817261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747319790568259e5015f5490990bc2ffd6fa003221a3d25db9fa350e467aa5d. 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/USLD91711043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b15c3fe48136f39bc8281b4cd83ce9b93558bd938f0168991f156997aee3f3a. 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/USLD91711044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea375c032a4db32a8a5549ba0f2142349d3f09c6c658cf1376b19b37816338ad. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/USLD91711045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b383c8dd29d4e1f5fa3ac85b219f6ceac72537473d75edd03641de6153c9e03. 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/USLD91711046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf1f462627e02bdff0fac8859c491171868a56621520b5802c9c7522c10810. 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/USLD91711047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d07377d9b2b4408b5588b079da2f649bbe394b6565ea845f9d351c4dfcc1b8. 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/USLD91711048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee697c5d3bb8027fffa9a135a82381330e6bf457ae266a99c134f7280b604212. 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/USLD91711049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720bbd625d3cd1a8d7376b63c67e184c477cfc3d3822d8cc04a04ec8a293010d. 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/QZTV32389881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e4b9e5d00e824f7176aa13eb2ca9575fd51ebb70596c9d87fc3fdd8802026. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTV32389883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda91e2bdbbf374e99a18e184987db1155138cada059bd27cdcad169afd45151. 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/GBRKQ2318839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cafb4978da088f9783d503b249e871067aebd5fe5651710f6c9ace63d30cbb0. 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/GBRKQ2318868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508f964e13e035f154717188f450d14d112d68f986d8fb18de30c10864155722. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBRKQ2330825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4351d378082549e1ef442b6928abb89f587a95cefc4dfd31646de11fe83e71b4. 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/USLZJ2202159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a188541e76de47bad8f420a84b24bc60203d998dd4c9acc83766e0b269d321d. 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/USLZJ2202166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806981e1e16f56d4d70ebb641f94fc2f2162c0f719550b776ab7997e0048bfd5. 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/USLZJ2202171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783b063e8860f40692148f283dc8354c827dcb2c14265f08db7c6d5bcfe37938. 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/USLZJ2202173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e4af45cb8c8e235197bd469ee719e353d64af5cb0519d929fbea6e3083f41. 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/USLZJ2202163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f171b77f1ab3b24f78d0bac0c0db5bf7c500a84524b9cf95a414beb442a5a3. 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/TCAEP2059083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5f9f5bf67909369a8a7ebf4e689ad352fc3c1ee64352830c8fa88b9acce8a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADY1817158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfce406698294bb540e7ab581fdab27bbba69b819f41af51bfb6611ac945acb3. 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/TCADW1877236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb72fbdd99d2466fa6a157ea3dceb9468ac66d83d8e8d63f4d96a1de0a8c4e9e. 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/TCADT1861431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b776ec97e38798a5a7f9f7574e2766ad63c2ba06c710bea6eeffbf4c5ec7c2d. 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/QZ22B1977302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb97604eb28cff5272a30ce6a53838b23a5d2d72ba663a00b3bd62a09ff3055. 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/QM24S1816267.
Letter to Her Remix (feat. Trinidad Cardona)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe898177340294403fe94a8054a9b3129f526693d0e23e82c7fa629114eeba562. 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/USLD91711320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23db4505d48540014e67734937d130e1f1d62dd5b20f3b89f80d3972ed40d69. 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/QZ22B1806948.