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 0x867fe77784a24e20bcc5abbf8e3d31f7fad30d715b14af2f761d4883d1b7a5b3. 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/9462e3de-2228-46cb-82ff-757468e43803.json and https://artists.proofprofile.net/proofs/artist/9462e3de-2228-46cb-82ff-757468e43803.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 0x7ec8fe366038787eba4ef4bfe155a981fbdd7130a697979597bbaeaa76da5680. 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/GBLV62311564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa086c538b467648951710daafb6de878471511ed65356f7566eb251836b6cb. 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/GBLV62311565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e22c582e6fdf2b8b6cdf65ba3faa94dcede4ab935a7491828c1620c2b24416. 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/GBLV62311566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7aed3e4e0d8169b8e6559aba43c3d7754bb502b2f02eefcd48f1a412ad0ea4. 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/GBLV62311567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76fe7502698f04045902490739f52be27981a3f4d330c3657b6616e8b8990d7. 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/GBLV62311568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9901ebf6ed4bdca5b4aabc27c423f850d07611f462768e93c82bd4685518c. 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/GBLV62311570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3764dc7297375e4e196021508d3f5989ef3069fd0c9a938b645b057c0497e61f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBLV62311573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eebf89efc53775b0a9023035f8cb8f305269c4208f3b97c24c1a15410b5631. 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/GBLV62311575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826b6d82d6e8167b081b58ff60976332ef1f292061bcf0db8ce3b47c10c3d3d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLV62311576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1e6653a8f93e0053ffae4ea1f135c0dbe7cd6f58b56a913f2f87a0cb6281e6. 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/ITFGO2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704e35e8a5f6c8225c01afa7e0b4090785196bbc6957221f9428886ad25a7749. 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/GBKQU2273797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d3408a70c539440fccbb864dc28ad7c3a43f10171e18fd1dd77ad8ecfd7467. 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/NLRD52414803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0a31de9e4619cb9ed468b129b35bc0a6d11fa99337b06ce6a2b785d6499ca6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZK6J2504136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6214e802a90114a87dc6a7999419006a550af58dafefc97ca5e37478a1e9062. 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/QZK6J2504137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d1f6d6933bc4c34ddac3bf8ab559c45390bbd9c18e05e760f99a6b5f104a89. 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/QZK6J2504138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15dd1e7a48f58b13ec67dbbe46277693b14e2bbb791f56313ada53c42a14973. 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/QZK6J2504139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfe77e7e5abe7b27f22f7d4d1ed4b578a12485a29e2b0bb4e4191fce16e34d2. 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/UKLVE2401502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4cd884076c520e4035d6b6d40e42bd58bd67da17b431b81c864e744aa6d8ef. 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/GBKQU2280066.