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 0x94f9a68356bc5cb5cd020685022da257f7c3265aa9507db388d095ca9e54ba96. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dde5a632-1697-47a0-b2fa-cb70a8a77ac5.json and https://artists.proofprofile.net/proofs/artist/dde5a632-1697-47a0-b2fa-cb70a8a77ac5.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 0xd83eebaf532e34ca9ee4d01e8cc8cdcc798b64a63337c1325be1b72034031f09. 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/QM4TW2298661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ae6c8be9f3e447746182ec1b19afcc33282b2a76fe08a493a08e67473c0e6f. 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/QM4TW2073126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18807a080742df2adf61c2b581b64a123708e46d3df681a7abc5346e83ef2fae. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CH4131800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654028c720799b025a4d7bafb87b7580f411e5e0d6db48ed636f4f05fd24fd65. 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/QM4TW2261101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0019b8383cae4bc80b40a216d691c2792d10ef5cef60ca7a873ab9c6e23185d8. 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/QMDA62165445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd001713874a353081e5d231145128078d2b2a8d03108ce52abc4274b0182e4db. 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/QM7281972840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba29bb70e48467ae98ccc04f64182def2c7377e1b5e25179a173e5f9bb818aaf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BK4DA2427651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5871155ef405e44821fad3b108ce01f79ef574a5d14f198da7c3fbe71b460322. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CH7812357176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1be0744850ac9f0fe9a65e5c94c98d6ac0f37ca3955d6bd9bba0b17260186e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6N22283757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02544addef4e852fc1e773a4367269735016632b21e75f56e8a00c127aed9903. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QM6N22283752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc6c7e1e0f791712e1e0a49f59a36900c52a3cad90c37683c9981723c689350. 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/QM6MZ2270349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681b4a5448fb73641f496759570076db8468120647a9e642531f2e07edcc3d9b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2254933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf82645d95ab3d0ece84c57f3e6f750fe1195a9bc588c4b136cfa134c17b453. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEXN82064981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ae6c8be9f3e447746182ec1b19afcc33282b2a76fe08a493a08e67473c0e6f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM4TW2073126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b007c5011ae6def02bcdfe08c65e037c24a7a29cb7c3e65874635fb6d6861c. 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/QM6N21979897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18807a080742df2adf61c2b581b64a123708e46d3df681a7abc5346e83ef2fae. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH4131800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb192cb7eb9c00eba1a1ca5a997bdc87d1650104ce1d8aac4941e2fc0cbb095. 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/CH4131800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51559686b3d090470dc8b565092747de1550c8e3f877b7930de9315cde227bf9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEG441590741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5d0590fad28b07aab6028fe1a6abaca1941268d6be0515467150991dcdc0e. 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/DEG441590742.