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 0xd754dcdaf89c021a2eb7b33348268cc2b558b11e92c118632bd287e2654561b6. 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/a33533cc-e3ea-4c45-bc24-9227080d2c96.json and https://artists.proofprofile.net/proofs/artist/a33533cc-e3ea-4c45-bc24-9227080d2c96.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 0xa49539a7ac67f8b679e5a85f1354cf63d7c9174654da3850721f786848fb43b9. 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/QZNJW2175144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1a62146f542e1c7dd5eca707112867412ead93d2e5d46811e3f872d29a2d2d. 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/QZGLS2195945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccb3a5c54b64692fdcdff5063d115d5095a92900a5aa19500067483bc540421. 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/QZGLM2041241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8598f32f17038f65e930be5055e41c851bbee17622b5570c912335b334d9928b. 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/QZHZ42042043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09fbb596f0c6211e973254a17b11405080553a0d2dbf575a185bde34327a7fd. 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/US7VG1779564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5d4b3df6d42fc1de5c81681db530cfa1e32a9f6d30e0b99c75ce9ada4a013e. 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/US7VG1779565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36320e2314fb6d3ed16549da1a01d13caea22781da1c626b1ae86e328f96dd24. 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/US7VG1779566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddceef29f73d1ffb6799a2bcb1e55a80b5bc5ab14c542d9558ee674a63b674e. 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/US7VG1780352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6b47ea523333dde505acbad18fa30c99c7aa3feb3bd8aa5da464f041be9038. 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/US7VG1779568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1700eb819ff554ded68315eb69dcf678b0a3c30d1bcf9af3e121f3508747eef. 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/US7VG1633201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558c4ae01753a6862158d5529bda576926316f7220bb541ea6cef0105f0578d2. 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/US7VG1528164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029fb42de23b7ceb0920ab8cca9a496dc51c1f87cc5c3d6ab2b944fc856a4eb. 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/US7VG1528165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f202c593c1f6d5953b87e0bd6e95d1b854b565a966dfdb47e17764f00991008. 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/US7VG1211906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20a890bac2d3908a3be100b034380b141868bd788e2d7b7908e694ebd2f860a. 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/GBLFP2491772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c6ffabcb510b8d81b067006ff6c20d76250ef3e196f49bf41da05b7e367fc0. 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/GBMA22328127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac589d247f93c62ee8e66b948897613969172533985ed774c2d8036a2204d5. 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/QZHZ51967078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629a8ed89c3558bed018cf3fde2b944c89f0eb49cbff233344ee954aabe0be4. 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/QZ5AB1633135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be13de1e58480dcfd8d3fc1d5838fb1f7b0192b65dbdd30e1a07f2b84f5460. 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/QZ5AB1633142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db37a8f407f540209c919dcb09a2fc7ff3b8f092074070cb662bf972381bdfb. 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/QZ5AB1846876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d39a1c9cc11c5c3ca9cafddd0f8616a2e315cd26fa3d419ce5b200131f44b6. 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/TCADQ1896643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308f7d84ad5295b541df37d754c3bab97d4b0aa7be361bf0760570ed8348d24a. 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/QZ5AB1947384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5339bfc8cde56da0562a7bd2ca616b9f32216805869538b895d13971c2e1332. 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/QZGLM1984585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d975fee7c2d506d953e58acb23f7e50cc78ea11803aa4df6b15390900f6f9c2. 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/US7VG1942576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2b356250e756f2e06280a5d7b373d3c25e69120678094c2b2fedd61d7326d6. 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/GXF9Q2470960.