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 0x30ba74225e456fc443b8bb3c5c0b064890ae5dcebff7fa9b7c96030473768a36. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b53071e6-f423-4208-a2be-77608748dbe9.json and https://artists.proofprofile.net/proofs/artist/b53071e6-f423-4208-a2be-77608748dbe9.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 0x1fb2d283a8e5d267b9f390b0f1c8ca3d9cef7bdd0bc14ef50e3b83520ccad64e. 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/FRX201978138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9b83ef86286c1fb8602b8a6cdfff1250ac54d1e53e3011fa7cf8dfd9443ac. 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/FR10S1742236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5f2a0e864b2561d81825334678acc18e0b948b1334a5e25a770d4465b85a65. 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/USUYG1286775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280c5eddf03ee92e02debc3ac233c4981920060bd4d6b7e0a36db0a3ce8e30fe. 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/USUYG1326700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f1b7bcc1a7850806209f90c0246a4b149dddafacbb9f9c5ac693efeabfa01. 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/GBKPL1826135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e00fb7dec7d1f421a255b06b4e5ed3b5fd649c65a696908349573e97c125962. 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/IDA141802540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705824a161f175fdaa4135ebaddf217b341fbbb9ceb2fb76609466358c37166. 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/IDA141802543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8184767e58862be71989b15e4536b9bbd63cd29105cd6ae7b387eabb5f6632e1. 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/IDA141802552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0353ae9750fdd7288cd50953fc7bd36ab11b3386467d35de59fdd014bc9d04a. 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/IDA141802554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9a65e155c271ac3abc2d371e0bf27051ad22f072289e7afda8660e44af07ef. 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/IDA142102830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31561d2574236fee0146fb7b10e03b32c40f106f624cc69c309d8420ad9074d0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P2227372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59ea62cc1173c73abda66b71e5f46e253a93201aa85014a72195fe926dec18. 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/IDA141802615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d10904a85209c257dff6c4fc210363bc9e09dd00d485f4d11a7862b49b08cc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IDA141802617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1a16eaac0b27a41e91ffbc0aa55aa664a19ae1e68dd532f64094981b9e723. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/IDA141802619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9668120e3e1bc99da8d09a24b28f3ae12f016463978ce580c5f9f5875f705fa. 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/IDA141802627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e47684498f9ac2d184c3be33168b3697e5e869f2247ffbfeda56290e550648. 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/IDA141802621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fdf07c6da9bcd4ff69546eba5afebd9d7932dd9723f4b47860e00ad1bb0728. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6K2010133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a04fb110f4fec55419b1103faec059e682c09fdebf4d147a2f68f75de9bdbf2. 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/IDA142003694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72530e191a097ef4ae91edf17d59ea62058b4abcabed951e799de21c2ab3365c. 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/IDA141901035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d29dad9c425abb90c89add771f14618bbbe80a77dc61061c0cf02792f42a1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR2X41837189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4692d811d2eb101bc1819b39685742a6eb4461b144f9841b84872879cb688d3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR2X41837192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8165dc6f1f0368491f79b0c6ff249b46abeafc3d122b56412218ba497ba33cf. 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/FR2X41837193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381845e37ffe9c8a4763b27e50609ac86cbcbefa4ddcdd45f571b4fa926d2a39. 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/IDA141401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82c20ed48d74aad27bead4515d73c4df2d934358bbd67bed9691c9a952529c. 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/IDA141401716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822eb9436280b09f1ba3724a39d0750a9d27d6dd4f0e9d2e106e3f6fc9618227. 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/IDA141401717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3fe884f58f222708f4909fb79f6cd3902d1bb402a60e4504aeb167cd008c6. 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/IDA141401719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff61ffa7df52a299a007e629959cf03faf4f067f994905f81049ee2c915a4bc. 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/IDA141401721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f861029138148b3ac2d247f3b9c66c9de860fe541e58603c94d919732a27a1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA082357604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf78796b98a644719899102a1732931d3ae40493e2a2d696f323a5262d9a65a1. 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/DGA082357606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd871b259f56ed47c71162373eb5dd5855f958ab22c6d846391a02e1326202f9c. 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/IDA142100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fccdc6141c3764c2e0ad93485f1c7c312e46d37d032afb33c685befad69799. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR10S1983238.