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 0x9debc8887bf05e0633f9e314df1ba32276d20fe856e8a09c25ef563c051bc67b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37f7c048-e244-4845-9b31-56c2c5f8a324.json and https://artists.proofprofile.net/proofs/artist/37f7c048-e244-4845-9b31-56c2c5f8a324.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 0x6b42db9bb228856f8ac81c67af749a4a3c924d0cb18794f53d6d02f630373210. 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/QZ9AL1706460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb5822553e72e9590f7c7f2dda51d42011eddc8b50f45ddc6263f5597c93c32. 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/QZ9AL1706461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441585017fad3fc43eafe86309af2ff9abbc0d1114a9ae3cf8665aba3681b61. 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/QZ9AL1706462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ffe0eec31e5d46aa42acbce272509358c6a6c8dda41a66ccaa8927ebdc5cb. 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/QZ9AL1706463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b5591c440bb2f794c256f017d320a852fdbfacfe2b2fdfd56783c644f16523. 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/QZ9AL1706464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc78c10bcd0f5e27ab028206f545a6e263bdfd12f1bc702a2598b785c2ffd64. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZ9AL1706465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e764d444a21e0c0762302bb082d152c0a6c1161ddbcad2cc5689b2ba2868b6. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZ9AL1706466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3804cf5cbabeba50d185f4e140ab333d06b9208376a29b3fa8faa8feccf686df. 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/QZ9AL1706467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53114cb0ffee7876e6f957fd2420e74fcddccadd13c4a16b2e36e961f2664fb3. 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/USCGJ2596876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c19f4627c5f4a9f2c79952cac0b6973cbbbc7b6ea7759c81f661868403861cc. 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/USCGJ2596877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe822916ba1c0f4c90f23f4ea63ccf15aee2f1666220ab08afc83f69413f0890e. 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/USCGJ2596878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133c96fb9faa136827064987ec9aa36ae7a10b4ae1b23a14fe8ac8263541a1d. 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/USCGJ2596879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f698b9e93ec3ceea49bb1034649861a8beb8cc1841d4b9b155224331d69943. 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/QZTAY2333369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c288e53b7da4b243922f46daa998d0fc7e9fbf0e03a0a5b1a69823685b479ad. 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/QZTAY2333370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8f5ed1f0d32bc3e01af12c8b69085792ab44af942b0c178dd80b07e0ecf47b. 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/QZTAY2333371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2882e0e308d4c06d12d618e700cbbdab1d5c11c70766b402cef4765794c08134. 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/QZTAY2333372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beab3baff271c30f83a2fa6ca126c63c0b2e47878b373886330b863f867ab91. 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/US3X59903001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8529afb465f692ba5f161c3a23c2a341598cd57d428967c4efb927dc32e694. 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/US3X59903002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b85b07541b54642d9b843a0ce78d7d7dc7b35a9d721b6f5299444ea9597786. 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/US3X59903003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6330eafbe1897dbaca0a0e5fa5ff00541d8f42827f57cec929434d2aea9f03a3. 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/US3X59903004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f30a33b05f5d22e74760cbfae90a33814a41f21b9315da60b4b582e056407c. 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/US3X59903005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b85b07541b54642d9b843a0ce78d7d7dc7b35a9d721b6f5299444ea9597786. 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/US3X59903003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d62faba48762bb9ed02b60f59ade948e1b27a473cec10686d69ff3f3a5ca3. 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/QZES72160300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115113976677feca8b10c88a76b95ccd8830e553e4c64934a3d166bec3aacf09. 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/QZES72160301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2365e7e6cc379f004f718cfe5a6ed6a09b5522c99686f71f8f01b484c4ebebed. 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/QZES72160302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87252c0d6545c6f97f08e6de6a2a0fb211a6f66052e3565c2d9454db66509905. 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/QZES72160303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c055261a1bd8c1a691286e53709f4ab88c46fb59c89ef531cc180b279779f1. 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/QZES72160304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16265bba674faf2fa97c64c8613d472a929c27e910e333ef97ac68b44b5a0caa. 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/UKMLV2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e146300bd8aeb9651350a50d983a2f9d6c55383dbf679c1d5e445809feb1d. 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/QZES82575777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99a33fee0c9312fb27929615840747fc8019b5db813927b413d03a15eceaa3e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82575778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d85110e5417f3c6530dbde41842cd26dc7af476d1782850a474356dde27add. 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/QZES82575779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ff00bf8e693d27ca7d3c8283c2171e2c1a59d9c903546b9945b2e91b62fbb. 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/QZES82575780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4b610034c1751e477eb0c9d32445c6d15497c7015596de213b0ff90d793a2. 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/QZES82575781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0703bd740a15cacdae0d466c141e5fd2c5f177df419fe3a1b06880c23f7ea2. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZTAU2428516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56895ac105c7bcbc7791e8606085355124fd550eecab125c5ce263b8c26253d0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZZ7M2465526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2a43a47df82b513296d688dbb7aceb46c8c24a22a0e707663f5f8a2ca4eeb2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZZ7M2465527.