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 0x2bfef2dfe5c4c823e9f95bf46419f6ce04e0c7e74e341569b8de4614cc7ac90d. 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/2a7386ec-db4e-4005-983e-6fe49acf89f6.json and https://artists.proofprofile.net/proofs/artist/2a7386ec-db4e-4005-983e-6fe49acf89f6.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 0xf4b4e7a6c0ac1ce6e911e90d62621308cc8d8e639458c4a7a276eed873e7bc6b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5IB2001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6643b0c9bf26d478b825f6b530097ae442488373b92641bc5758a1324a3d663. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/SE5IB2002488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8298f8a9c75143e726c06a4a4c848902bb97b8f3cc800c7fdaecc151262b93d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5IB2134282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b316264380b93926cea07178b10ac0a16eb28003676e8895a1bbb7c79be94. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AUKDT2402710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedf94953e15ce520d054a6ce3e50152454d59e810af0b99752b163311c6d34c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUKDT2402711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204f86237ac0d4167119a04af9703f416dc9517cf79bbb3a1615d86b6bd6b0c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/AUKDT2402713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cb988e0c588f26b29baff518fde94949990a6b915f4f50a45961bd51ca4d97. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/AUKDT2402714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8645f0561a41e40f17e64bd799fdb0057ee6f91127b8046c8f5cb03ffe5413a0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUKDT2402715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd53550e84c85bfe1fba9dba51df346493cdfe2321ab03fbbcb74b0b147d29f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUKDT2402720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506cce7961f3d64175dfdfe8d8ff2100fd9ad5439d5d7c9deb5c87a57a90e0aa. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AUKDT2402721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bd07c9c94c7613bf7c9a610bc638bbd9c9263aa3e7c9ff6594468acb52948f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/AUKDT2402722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd914809ed3429dc00fda264b6dd170554a1ab11ccd11b288690ff99685bebf2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUKDT2402723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd671b779eab043ba141d368e21aa951a6c52521d7fbc194400ecb93dc9701e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/AUKDT2402724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6af961810143c50f4831bb09ef76dee0fb9aac258ca4316d663632b824dbd2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUKDT2402725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49919a7731039cfe42fce342e99cecc401c7760e16ab2a1b39ebd25f35ba7bf0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/AUKDT2402726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4a9ba3f99e6657073e6f6458022dc8fa0b3b77989ce1edc68fd94069a2c618. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/AUKDT2402729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7558d748003dd7a22efe0748b3c56fa01d437f879590975c2ec3612558e673b9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/AUKDT2402810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe308529fe25645da58127d9dd45718fbc2488fedff5943586245518db0aea26e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/AUKDT2402812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39925ffceab1db2e5f117769cb35facf4adf56846d26614add393e273595c462. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/AUKDT2402813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8926b0520412885113646e76e1336b056a728a02bcd0bb0520c3fce559a5bf. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/AUKDT2402817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288b57463466abbe8e62126519d7b0ce4ab5f44c1d51e6ac39c7d378bf1684ec. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/AUKDT2402819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff7d928753093fcd579db9c6190c56b7fc3a4ac1c6dc0572ea8fd5596a5a62. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/AUKDT2402820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1feeb4e0412eef8d2d17107157a8e144659f56ce91bd44dfe37f0d35c2f037f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUKDT2402821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1d566d4f57f101d54826907eae0a1a89380146ec02d59fc2b9d49adfd4b1fc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/AUKDT2402822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab476b2e04941c8b8e1f1ba5f4210d7831cce3b33c0f62afb774ce14ead4fa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUKDT2403062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129b4a2458b63e1d1ef4b175f00f30a65aeffd74e4a030d8e76a6af92eed7c5b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUKDT2403063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3fab6543306046f2c4b37ea6efa20610ddef6ef393abc6854c14b3522fe120. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUKDT2403064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ca3d7160d376dccc75f259a34691037d3d34c342a2dbde86d71da732339f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUKDT2403065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8332cdacfc88ed015b17c1dbd3d8b6378dd2fa94e57df7cb3349fb9badc48c1a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUKDT2403066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a287e6478446ea03f0044a078c2b2e2d911fde498804c8676e324b415879809. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUKDT2403067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cd5f5e3246212ea31f3d77cca16fb5f883bcec7ed795e54848481a05d62ec. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/AUKDT2403068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a57709bf50f01dc1e17be1cc5ed4f635fdabf380558077aaecc940874f57f7. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/AUKDT2403069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad093f3c13d2985fa4a935030ca731848b6a4ef12c0e69076c6c9e2d0511ab83. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/AUKDT2403070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6d5431b8b889f87f78a1e165e70e4731361dfa91b7a77b729bf295fab7c890. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUKDT2403073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e50a22ed2c32122bb816aae6af33eb20f57e2e1251668d21229c2518bbe23d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUKDT2403074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638ba5cedf9328297960c08b42fdc86588615b52ca6c61e6dfec7ef26047d48. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/AUKDT2403075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba5ef971cca02add78a67cb8d2087e72355a7279b611525d631e7571c83fe3. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/AUKDT2403077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b25ac4fd536b8729fbc611b4b59ba83424188842a87f3cda7b9a262ea9e6a7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/AUKDT2403078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8703634670531f322673252b089527874fb9521f7997082814735136804a70. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUKDT2403079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2957ba9e2a44b67428bd330b4039fb37e389b1849997f54fb057478be28ddbdd. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/AUKDT2403081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f75c611b2c71eacc6461c417a7e70a2cb7e1b4ad82b493823c252b1d9bfcceb. 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/SE5IB2343707.