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 0x39779f71d115e32aa930bc5d9ea2dfb5c6c5e7ab2e6b76aa297f18322219190f. 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/0bd05ba0-d48c-4579-9b2b-18746527ecf0.json and https://artists.proofprofile.net/proofs/artist/0bd05ba0-d48c-4579-9b2b-18746527ecf0.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 0x176ab5a78b00906f81d1d6b6e72de2dc3b3163a7b58843779838520022d3d2d5. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USUM72122717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c092f9831b00cbd3fca2ad24f61f2b3815b60d2e180a41512dba3e01de68f92. 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/USUM72122720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cacce10e31fc6ac11ab72f262ae0ff760dda93f6c86d795d10f0be0f4d5b63. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUM72122728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1232a6daebe79c8be06b6042dad13ebbd5201a4e4afa16e2de1ed27a9c26d786. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USUM72122727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d37c1eba3e2e8bf7d18d78759c4b6d0a4249fe773786c74b3b83cb6e46116e7. 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/USUM72122724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb9864d32f7863a7448216ec417f3e7c76a28a383bcb3490c67cf6420759209. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USUM72122723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad6477aa6cbc1ee011800fe443fed4552c8eb017742ca10412b744babf36c5b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUM72122721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad700fea3e2c6139d96bfcc1864ebaf7295cbf69d0f0cc8607024248a40146a. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USUM72122719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dbc757ec0a1cb5cb68fa50641d45a90ef1028d152bcc56236dff1c6eb4c87f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USUM72122718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3a32a89cd0f6141935677d25e3b8f0f14a56e5dc294305bbf05723cf463c52. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USUM72122725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a74541e870e4ab717fca5c325e08b024ce88f525f4961568ebee7a5db86155. 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/USUM72207984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70090ae0f2d3718aae13a865789dd9ccc6a65e34d2b3cda9ab4a7311ab520bf. 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/USUM72313069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf668271835d095c81548f0fa938f4b89b84807d7f1a2213c1c4791ff745f7702. 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/USUM72313062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d23d4e073b9a52e65228bdfc09b95ab2b94e34a846efa96e8e47470439d0fa. 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/USUM72313068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a74bda09430fb373b0d2d72750958db763a6810f5c9d97a6e466b98808cdc36. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USUM72313064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b05c831ea59534b0cdf11b7d94d879337233ae91b377bde957b378f5baa09. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USUM72313072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b0ef8c16bde8068dc57fc8461cf0e25d166a8a0e3ba9d399f821b3e22b2a8d. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USUM72313067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3119153aba285543dada9e0688c2e5197770fe2d5ad801dee4cd055304d867. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USUM72313063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70090ae0f2d3718aae13a865789dd9ccc6a65e34d2b3cda9ab4a7311ab520bf. 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/USUM72313069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d26eec4329ef7580dd86a370604c439c1b80af2806301768b68e2a76e2be00. 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/USUM72313065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab10a2c42c2072515f9689aa39108edb652591b46e9ddd2accf376209a7ccf7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:57Z), 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/USUM72313070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d26eec4329ef7580dd86a370604c439c1b80af2806301768b68e2a76e2be00. 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/USUM72313065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7ce43a5c00b1c612d29f3681a387307c5dccc522fb67993bc1a5c560c10526. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USUM72313066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75b7e75452290cc49f43a7635c321fc83929f70fe92a7e89263845c2ef629ca. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USUM72313073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f9c7133d55e0baf00541a65636955199052054e637c3ff941fbbd8d153b275. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:00Z), 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/QZHNC2546702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be2b5a527e9f871861b654bb50d9fdb65dfbf2b42f5043c91865418dcb6038a. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZK6Q2525746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e60f84e04f824952a4ebd18bff1a3f7bf10dbfe95cea30fce4b87ae10957b6c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ7S2573709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcb7c80a6b356dfdf737d10df71de2678a97592e321ac26681fa962691c812. 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/QT3F42511036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404e7fca335feb76fedb817be77b0a4e1b530f9d23827b9d171b859b69db3741. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FA2545419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb67cb69a590b71410b853295ba4f3bcce70c91ea8f0b921cd0d728afefcf051. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QT3FC2566689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab9a1c76bb6ebab230e26148cb20b10118124c9a271f7dfc4a9bb00154cf79a. 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/QT3FF2579928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa37205e049969cee7fca2e9c0e2b8fca491648bcab27976c5e700f6839767. 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/USUM72123009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b4a569aa63b64562a4b8a3d54f6a7e40c0fa9861c10a5b22ade87ebcc6fdd8. 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/USUM72414474.