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 0xba65764446c985b1223f70f46706ec7fbb2cef8253efd9e6956959adf6aef8a1. 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/adecc142-a021-4bfc-8e5a-d9a481950c57.json and https://artists.proofprofile.net/proofs/artist/adecc142-a021-4bfc-8e5a-d9a481950c57.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 0x700b0e92f868df661a78cdf9963ce3c3a15925d20800bc99613caed27a7531f5. 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/TCACW1610698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707a18885d1a31cfd8a050c11197c65e56683fc4136012ff2449a14ff0b42f8c. 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/TCACW1610730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdd2ecc7ac637f12d246d9b39c241a65c00f37e7dd8572d8e3226c479972cab. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCACW1610731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4252ad16500f03fcc8b8272b5844454e774bd62ed9b05145c9c7d337c748b854. 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/TCACW1610732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8578931045c7737515cdc964e9f496cc05357b1ee7e69980f087b19ab1d227. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCACW1610733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7adb7c65fc951cfc8157ce77c9a4b70db08127065be8be907623786f8ca60e7. 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/TCACW1610734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59900f9a5a3530b43a0d5136e853fe133eacf9ec130961ee1f1a7fadc88976dd. 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/TCACW1610735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806db90fad93e3e466a2a8533f7dc777d6f809e55ad7c5356f60a0f89a835642. 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/TCACW1610736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccae3778049b5879430c469aaa1d6cde112a3c75445eaab87e03882a298090d. 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/QZ2J21508751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f933c657620905e804cacfeb252d8b55b6b5ad1bd12b3515fe1e311c22bb10. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIQ2402416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554c9fe10d70a002eb5552be2e6d3b3b282698eacbdb0fe46161beeea23572b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIL2453505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc851d8bca8e1becf2b7861e91d2de8b2a797f6ffd2dfb8c89a6946c3715a40ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGT2327103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62baf8d8d01884df9416432f8a0a87ba4b7d7d979b3cc99c6825e8b92dfd289f. 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/TCAFP2122892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8963343cb8450147957f1184ba19d600060006f7ce14c44c8b72c3af7e51396. 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/TCAFG2003231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ae649680126f783a6530249e382fbcda03265d0450f26d9e705138e3dc729d. 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/TCAFG2003248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc2ca1c415e0015de03ee34d1c63a400785aa2f9bd13ecb9841ae394f5f30b. 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/TCAFG2003290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a8941abd7c0b2e68c316d49afe31544b183fc31971ae6115b2a5c10d0f9e8a. 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/TCAFG2003301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cafc8a4924564301981e772c06157f512e7937d55bcf7e3f70ead8e4535ad5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFG2003326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0be78332fe0dce0ce9e3abe6ee3a36c84bf873e00247459bd8bd83c2c3683. 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/TCAFG2003371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7706065dc7333be32693c5eb24b30096c779f533afe34fdb8ae197f8ad8116. 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/TCAEW2009220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcda650771ee766724f1ba4c80cc06af30887c0d34438b384bbd91be9c35567. 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/TCAER2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374571edd9f545644c6f1197b566354502b0651454c628de35357fb6cee10cf7. 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/TCACP1603301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ad812508187a826759b510a3ae106767b383b846491b5c3e336d2001ad71a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTB32401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758cdff03682f593b6f80e12f1ae7cbcaced4652cae7ea96aa9c2521da4ee66f. 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/QZTB32401702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2698236e9d4de514eff0c75690653aca8962a647593ca7f59bc23feefd8874d. 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/QZTB32401703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d9c4f9de30aacba914ba692d230accc1815ad3105c256b611b20569f5346ba. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTB32401704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f4e91e77de4c2c7a3c334b9753e173ddf96af3e4a1dc395520768acd0ff92. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTB32401705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5271c45fa84069dc67a1870d33ce90177d600a8a4b5c9222916f8016aee359aa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTB32401706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0551a0903e85f9c2a697792b844192192984034272198a29d9dbf3f0d28191. 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/QZDA51859026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b8b852b155d86faa9e5b6e237ea30f32dd963665a437e42e0513e91bd2426. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZRP52311425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c971e09a9b5a33e7598b52000cd5162e855e165128072a5901b5d0cf9b79387. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21508925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671eebac45d2c942b76f0628aa6226d886e8db4e4afeb5a58d8a0d1b83bbc0ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21508198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367acab9b201871b208f6a643b3713f4505ad0057942f433b2ca6d25d684b20e. 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/QZ2J21508926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a34b91cc34352a761b79aecec9421d6586b608c4d7c0ef7291c5f3e23eb8c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21508315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d95b25e9f74c97a1e1c9217d68e3baff2c756e62e3dd2f65016cb8e1463d4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21508927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894066428100361333b62296e19d16712f049cc98f1e778557d9fd28fd24e9a. 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/QZ2J21508928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3ba59974ab24590cf8ac940312cec1534bfacf80d1edd8c518bd2a365ece44. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21508929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379305f28bd15806346911a4f08b97472f2c7f0a7e451c1802ec083bbc9d546e. 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/QZ2J21508930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccae3778049b5879430c469aaa1d6cde112a3c75445eaab87e03882a298090d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21508751.