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 0x5b4277af1c43d0233cf189da50796330c2e0f27348ee63c9b207a58b53c7a5ff. 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/1d8b4288-322f-4655-a411-c5324bffae62.json and https://artists.proofprofile.net/proofs/artist/1d8b4288-322f-4655-a411-c5324bffae62.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 0x31b6dcbfa584684eaf403ff63cdfeb8f17b96cb6f17c8e42ab2479c924110198. 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/QZDQH2418572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bd2c1a1f73f0906c98cd8e35be202073d7bca728e6790c706ba75627543f36. 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/QZDQH2418570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848b7f9257375d8c639e7c221a593ca49f528b3164eaef1af00d20df8c1a2414. 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/QZDQH2412672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6827339778ff931fa355fb332aa23cf58fabf248dab5c47f231fed69416dbc9. 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/QZDQH2412673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82937e5f7894846970502912a205a509d6c8fea75bb567c4510a920580785755. 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/QZDQH2397338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839d1fcb525343f9581637f7221c72520679b732b019288e288e4143bef9b3ea. 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/QZDQH2397367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde4cadcea0a750e969608862c44fae2429ba79a7b11b9ce7b0b5ff2f8c6b6d. 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/US7VG1533078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9fb902644e47f3ef887d06e43cfb6532cf3b36757560141fdf8588c7c2724. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2149788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ad50db22bcd72efa13c9b694ee2f0d277ee4adf46b5ec340d46c54841b077. 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/USDXS2011980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3357a2d7f11b41ce108c6b729cbaf8c392e927c8ac81425569275948fabb27ed. 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/FR59R1909652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff27c397b50da9501d9b2e89027ec022e1cbd9a2f71f3dc5f23063aa7b8dec97. 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/FR59R1909665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b385c936434d6fc160b18bee381fdce8526d96ba07d6afee063918b77cae914. 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/TCADN1867679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e9d87508a63425be4ef1f0850c5faec11856ec45a6c7af1d1b0e2cbc5ed2e. 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/TCADN1867684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2766b300b311a705ec099c2e41a49834bc1faa30f6405732e1948337d8c8576a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USE7D1300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0787e063482f1b07f46d4925c240250ffd007be0a020a20d42edc85a579824cd. 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/USE7D1300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a1aa74d30ff18335b20ac5c257717e1ce0109c4fb1954eb0a3d29b24db7920. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USE7D1300177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12da77e5103083bd3af7e71ea9b486f6f5940deeb01b75fd0b1b800af5252af. 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/USE7D1300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a24b11447c1757be21efc3fea2afb2064cc8307dc323955e78016baca18f1c. 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/USE7D1300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce43a874848e23cc6e55980d9d13faa207ead2fd4309b93b2e319fedbffe60. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USE7D1300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae95a8f2efd47e28b49d01e6080945431fbc27ee36c521c7df972b41a571b66. 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/QZDQH2502262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda42c6b3bba8d00dc4b47208a7e9454ea18eb38160d723ead483861f4eaf92ff. 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/QZDQH2502263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdeb4cd28e4381064b1e92f221403a4f85915531483f6f4e250e5ef7d08b18e. 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/QZDQH2502265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2853ac8b8c37cbe6de4fcd6a78cd161f1fdda35750b3f0a8ab50dd727ad7aa9c. 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/QZDQH2436363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc811c4b8e6e8a1ee68316d2e52e3a2270e79e27c734c9a9b31bb0180b2c3feef. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZDQH2415823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7a4a6828b7ee292b781f44dad80a4a84e20cd89abf420976bf7b5273377a7. 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/QZDQH2417299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f7510a154d7f30f4ea00c2ea34c0638a4e9dbf6b7229e60f8e80cc0653aa7d. 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/USDXS2202166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318056a96fe9dbb58d7410b014e37786c4234641a5d6d9306b8ba2b7decffe19. 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/QZ9QQ2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79db93f0f0858cee0ad90ad77ea6c7d4230b5897f628e36a6bc0c38370832cd6. 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/USA2P2358475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ec92ecfd857891dfc0281ae34624435f332763c34a1af003b5f79c0f66db1. 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/QZDQH2204272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f92d8d4e6af8384494bd42ab88909065a2f4d77d403355e9ff6567106ba40. 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/USA2P2359092.