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 0xb905836ff12dc59a07f05c9dbae509c9cba0c7d29fa0369e33bf694cb92d70ab. 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/ef443edd-bb29-4e65-a2f6-3a0003cca84f.json and https://artists.proofprofile.net/proofs/artist/ef443edd-bb29-4e65-a2f6-3a0003cca84f.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 0x3ec86f33dba47f5d8d9c9af70190a04bfffd1866e854bfc93d148aaae0422fa7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM4TX2497722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905fe194ce0a7763fd792b91bcad3a585b5d0f1113635a3b2bcea7d9f45e688. 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/QZNJX2402662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24d84a27fca495d468e66862b8ca256b9d57e88ca2c4fa974ce59bed1f758b. 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/QZQAY2460671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2d22dabf7aa409a8defcb59eaa9ad79992c7eb324fb7638a6c08eb0b0b6499. 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/QZKDT2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed341583f5ce91d9804fbec37229821e9cd355d53ef5830722ea33969199076. 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/QZWDD2465551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b30a9ba3a2f6f3094b642956b716c7b4af91cb265d91430ca24beb99e5969. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTPX2472582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3156eb8ae9fb807d34ba37c6fdbf870cd2ee9f400b4d9c84552a956339e7a566. 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/QZNJX2458518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40778e98323ffaf1b30de38529f791ab822120a80f96f2efb59ce12a9f86780f. 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/QZQAY2485567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e91ce06e622a4d044719912f98b4f21de60765543e563cc5c820398bf5b70c8. 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/QZWDD2483276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe2eec11c8c1cfb791e40808b737e013d912c59e4c0db7cf65a2e30b73049c7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZQAY2414354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c2941dc0fc3c8d7c19cdc1ae398b433bca44642d2f370a74453b4032a87e98. 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/QZS7J2448076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6e86d1ce8a84be3ba96e072a5380b74cbd6e77dc850fc46f0856b12f06b061. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZWDD2443321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3ef729a7dad6538e358f997693b5ace3c6582ef042a68421a62f54304108e. 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/QZMZ92461666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e41cfb457631199bbda54bd4653c9f41e941cf4b79b40824e7a931031e8327. 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/QZQAY2434838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7620ec927906f84dd1bb43fe2eb193884ee61fb9623db7d3ba56c595916e59df. 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/QZKDT2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bc446ff203fa5038ab0cc8f00a6035ce17c6fc62f739d58f358d7162adaec9. 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/US7VG2457528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527451f38cc3e962395cac39ad66535cff4a4ea4552d6ac572a19cc9d752d0ef. 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/QZZEB2314615.
Chukito No Quieren Problema No Quieren Morirse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134a1230127854879149aedc379e7e2811644e5394d8d5c22beca9d70da9fd65. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM7282495134.