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 0x72719958160f328f9aee688ff1773be96d6aabf6f7eb7d7d8f5fe2d897a02f22. 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/460c4575-a10d-4450-86f5-f69c4d303d3d.json and https://artists.proofprofile.net/proofs/artist/460c4575-a10d-4450-86f5-f69c4d303d3d.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 0xf514e709ae78129288d60db8233346b9e8d26faa6c44e7392be133a9f7580d11. 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/TWDL72306805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8352b6a180e7fcd98fbf1db9a966efec740d34248e275b9f1aded269d5e21bc0. 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/DGA0M2425360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca062d17b6bbfb051bd05bcac8869438133f2124216e0988d62daa6cb8c4775. 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/HKG732434236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d7c328e59fd1d325fed4a5d0f86f73eb59eb9f6b61c1647b95a5b6d57c6da. 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/FRX762449168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c031449fba21d9d004f1701cf8f991adc91b6449f3252ebca9967a18234b90. 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/FRX452425432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38cd6790eeb59fecdb3265620470cbbdea22d6dd99349c8e3ff6f2a7927f8ed. 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/FR96X2438037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf781ff7f8d6385d18183729bd2fc698e545e7c47313d52c6c3e09cf36ef48. 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/HKG732293740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c46e7249a669758cd46732a1c8a7a17982a5c4cc112866549396f3db6da0c6. 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/HKG732293741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2dd368d0296059fa547de7d86594b0972890324f651bb9715cd615c25be510. 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/DGA0Q2348012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7fcade6c62052b5b09b5fc7981794adaa56c3a34fd5e8e9e3dde93e5dfbd56. 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/DGA0Q2347924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44168c7e38830064da9fd9ef2d5b1458f72bd66a1d313d0291533a05804907e6. 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/DGA0Q2347993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c24d5057860bd6abe9dad04b26e0ad4060fa8b9b82c159a9275d74b11e515. 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/HKG731606554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc9fd6ce0dd381d9b5cf0c26be274ff476e59ac198a546384cb66ed350493bc. 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/DGA062345500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd5552725dc096c47b8b8b6d1dbf4727b552c45a5635196420ed2ac0f4cdfa8. 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/DGA062345604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa07fb0c0a293a9fab9cdf0f76375095d4e75b90a72bcae03fd00ee5bf9274. 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/FRX762342143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99333868386240d26912ed9eef0910c6a99470f5e7e21b0cda8f5124eab8fadd. 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/FRX282366391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00511945d8272f83d15689d579cab5ae56e8d01a7e8bcae74e34d4e5913063ec. 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/FRX282383671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ed53005a3624e08e62727052eb9e9820fb97ce862ac9f1c03c4377187d5ee. 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/FRX282305857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5092642c88abd05972623382cc6134ac0ac981107d9c658feef4c9b885112005. 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/FRX202337127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3770669696b29c4b0a76d22de6c8bf783f636a475cef8de10854286456265ba. 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/FRX282383292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916a8730703ee25aba9a012e94cd3b25871541c3689a28540a3bd434978671d. 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/FR2X42394200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b46cd436ea5de54eeb6d493bea262d2b9c98043a558bb2cb0dda301682de7af. 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/HKG732276528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9077249c54e91002716d37be78bee08f6b01165fdcc648a50e230ed3690f0e1. 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/HKG732293546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59014a6a6aeed6d2d42ae7f0b01511b62d05e636411203ac1233db9ede46c510. 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/HKG732272093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0755ae8c6743d5f2a18df209be220d24a70bdd5d15e6411ebd4b4eab146d0de3. 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/HKG732250540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f47b5e5d7404e6253d9554292a255a4958979ad5b6f93f7873d262bf9fdfc. 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/HKG732248078.