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 0xba4883e117f85c14bec78c1dc99322fe5a02a87e334309fe515e0cc9208bc0a4. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c515bf8-4586-4d95-92d8-dcd17cbf4283.json and https://artists.proofprofile.net/proofs/artist/5c515bf8-4586-4d95-92d8-dcd17cbf4283.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 0x19d416d348955d7f5cba4332a0d58f4489497ba8ef815f02d4979c144e5cf12c. 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/USX9P2014886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f94717b67e1408d9e885fac92346c30f95a767ccd2fbc696d9f61b0ea381c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USX9P2014887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c34963fdab47db4d2d5ad1a26eee486b59b297274f31fee7b406a51b9402e9. 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/USX9P2014888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c755f77e6956792c84ecdbf183dc666893488360dc92dae835dbc2a75fa4e. 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/USX9P2014889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9484acf67d34a37a389dacd1df65c92de54b8fac67ae7a937484e6e7585aad63. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USX9P2014890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08be00aea1e7e00b5678f1a0d26ff5c2b445e757830223ab085d9965499b6322. 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/USX9P2014892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f71ee0fee32c1f6cdda5956ac33f82ed302bb60c3e5cc81f48ae8968d18850. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USX9P2014893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc209210f24381a403003b3b450c9fb964343d00d70da9c974a1a6b2aee53903c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USX9P2014894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2e29c26cd306c6425365cf07b79f998f5c730c0324a4fe0b7a8a9d0a8e6ecf. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/NOGTA0607010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d6aef3b7a863cf47580a97b334725eca4db15b8fc4b5deec44e722bc8571e. 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/NOGTA0607030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48cd724be2804e617dbdf63d5f9769da8df4c86aeafc8931fcb253346cc7ef2. 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/NOGTA0607060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17cc794e1d7e5d4af89ae66741acf1bc112c22766b1a516c514bdab852564f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOGTA0598170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2430d880dcaa20af5d5a9b101beab22fcef4519603f382abb320190d7d859e61. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NOR6K2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85d64ea5cc02d49fcde95bf392b771d5a8c3c8e075bc67d561d0de2d2d585bf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOELD1601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b3a005b727687d4409716b6247b10c0cb0e047581226cec3f353c03f99fa5d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOELD1601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d4518c531996c11d26e1a57fedf2aff93dcfc279f5a8d6ebb50c1a11f55d1. 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/NOELD1601030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46696c90fe7a247da6bf67bfb684fba92f1ec7dcaf32c8fcb06914b5814a8a9e. 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/NOELD1601040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a58a972e90d98cf090622db93120fafc4f04f1db705f6d6f92301eb2588eb5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM91447678.