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 0xf3116468b827454fbd2dfad33b26838ebcdc71f1b7da3654ab9038a7e4ac17fe. 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/b4a33e09-f7ee-444e-bdd0-0f9a9c55188d.json and https://artists.proofprofile.net/proofs/artist/b4a33e09-f7ee-444e-bdd0-0f9a9c55188d.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 0x7feeb2440f91ff028492c19b4a6a831089ca4d55802bae1e233753a46f490df0. 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/QZK6H2087862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b165322f8e6ec59704a95617f534c9982cd3f4ef063574b307129026c2089fe. 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/USLD91730923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5aea2a2af717af1ea12d0c54eae21c9c0077803351b6f752a06c0878ed5d59. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USLD91731615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae78d4fc234e5c5944f06c00cbdcd4430447b1a0ae0488976cc1a915cec6d72. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USLD91731621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f6f9ef776fa73274c7bf8e11b35785a7ed2ab2e9e7db66ef8e31142f099464. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLD91731623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f8298c898292d888ee81ed0e99e1390d5e5dc0051dafc83584277d5e56f538. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USLD91735412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b3ac9ced8c490152f9fb7be0ebb777da0762d97d64384f6985bbd6d744743. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USLD91735427.
Street Appreciation (feat. Taleban Dooda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3939429fb96dab4a9656f51a3e5d834adce41a5dabfcd518e9c75123584e2f90. 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/USLD91737152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f790583a6ad4d7e4d84bd1e1112edc9bf9ebf08d46565e9a5010844a6167b15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USLD91737142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab3fae7a5c0d9495a489d759cb287864281ba567ee73e9d2067e99bcce2a587. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91738007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b05122b1835469ac944293ed6f368ac55845d67265cab09ba1f1d095362d090. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USLD91739218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617d8930b39e62827672cb40625017e88e5f558756b9a4b2d4e95af3f82f21d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USLD91743748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf622bed0c514a5e8892b7292d8eb1dee9e05c419922a8a80a74e203af709e769. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USLD91743585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d44b35ecb23c6965ec6d9314d2bc305d681cbcef53cfbeee3645f8bd8a77f0f. 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/USLD91753499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0152a50e155f3199a009c4bdf377ffb863d9b5b9cfe052faf2ecf0e3350cc018. 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/USLD91753497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d3189efbdb5b917279d08a3a9750f0e73999fba6ee93aa8333fca1a3a4deba. 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/USLD91755637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4151ac1382f9b202f086f0bd4ac5ab75023f21999d0a83d8f79fdbaef682c02. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USLD91731617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332fdba2183e964f9de73c83e9a2a38bc714dee2c929c819ebffdc08bad4db2. 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/USLD91759040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a4b03065418ec1ebd1746288071e3265b7e21a3ee22d2cc1db9108bcbb3cd. 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/USLD91764787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4151ac1382f9b202f086f0bd4ac5ab75023f21999d0a83d8f79fdbaef682c02. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USLD91731617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163438b5109a18164fe8dee51680a8737c14a1947b5801a0fb52b3941bb17352. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USLD91766437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4151ac1382f9b202f086f0bd4ac5ab75023f21999d0a83d8f79fdbaef682c02. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USLD91731617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4151ac1382f9b202f086f0bd4ac5ab75023f21999d0a83d8f79fdbaef682c02. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USLD91731617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a4b03065418ec1ebd1746288071e3265b7e21a3ee22d2cc1db9108bcbb3cd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USLD91764787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4151ac1382f9b202f086f0bd4ac5ab75023f21999d0a83d8f79fdbaef682c02. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USLD91731617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fd8cd19591b2dc342274aa36b7793d4efb6af16604d9872e8a702e7b3882c8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USLD91765652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163438b5109a18164fe8dee51680a8737c14a1947b5801a0fb52b3941bb17352. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USLD91766437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88125bafc3e307e9782a228027623fe9004abe8d334812355c46425b0f8f405. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USLD91767266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee139b256a79cc711487b074bd5d0e3bdefa44b79fc3ea44baa95747c8c5cb6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USLD91767267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9000b48184f53b53b07102000436e90208a69b574dd7adbe3d92a5751863202. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USLD91772251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301c78ca5011be4aed9ff4a4d9545601d7def63aa68bd1a3e541018e1af4fbfc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USLD91778854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d83b622b5bcc2eb6c41b1562a31e472b46314cd4b51273d078242306cd9898. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USLD91778295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c7ad7d7c163e3cf56f54c27cc4efcfbc329fd7553f1771149c2cd8a2bd98b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USLD91780375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5980ff33069a00d7cf063f4af2c28eedb4b852a2d2cd6d70c06c10cc7df74355. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLD91780544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301c78ca5011be4aed9ff4a4d9545601d7def63aa68bd1a3e541018e1af4fbfc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USLD91778854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e1680b3719ab1b0cb413c01aba3a2ae7a2e046edd5f8eda93773c2ff58ab9. 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/USLD91728315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b927868a5d1b744e142b76b1186c9943664f348ca997a09313632fd2494670. 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/USQX92105341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b64453979a2a9bdcaab30372d924408a64fa50246e42e7cf7e72d37652d0bf. 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/QZFZ61904788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50bca288ec512a19e99094db828b7fac5e7c1d14b4b84c2312603d3a51686a. 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/QZFZ61904789.