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 0xa9553dc5ca21d2780bb36228df45dbcd48d88e5f7277ae3b3df94d95aa837533. Chain 2 (Bitcoin): anchored in block 954013 (2026-06-16T22:27:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/351621a5-64ab-4164-ae44-ed0e980b53de.json and https://artists.proofprofile.net/proofs/artist/351621a5-64ab-4164-ae44-ed0e980b53de.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 0x6c3496395b2afe297d24c22c6c31a0229f3892b2e05c0fbefbb36834f7f4b91f. 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/GBJSN0600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541088b1eab55f7a96239902169cdca99d217ca241970c770752838ada6fd8a3. 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/GBJSN0600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f4c53cb6f1a37c106e544300ab6b83198a5426859516276da89b8c742d037a. 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/GBJSN0600138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0f5006588edf482b86aaf62ffb6eeb0857c0b3a3bb1826ea446075402e9475. 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/GBJSN0600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecaebe5d385dd173b18a56807a78f77ccea10ae8ccf58a11701f4eb74bbfe73. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBJSN0600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970965aecab15e01ac103b17f8a7c42f681174093925973c3c7ad04e9e0606cd. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBJSN0600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923a8086c8fab1fdc47ee014fc3f80c42a79881db0e75f23ade328d44b80242c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBJSN0600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c54d6075a49faa18bc4e38bd9e04629be004dbf8e3fa4aa7ec4ee73ae94684. 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/GBJSN0600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd27ec277f0acb90c70aec9a6642b9a6e3892d4152392cd30bc2380c71db9ff9. 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/GBJSN0600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e7b311ff84719471c923c205237a3049a5509d6973c2a2f0468eb255a122b7. 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/GBJSN0600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ebd661fc42c00d79d431295dc0f98c8c7fc8e0adb96444440456fddfbae00. 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/GBJSN0899901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e9946317d15b955dfa93daadb54dcbd63432e919f96b2d961fa0d9a7a77024. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBJSN0899903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7290bd2b45426c683718afa43838433aebe104cf5e3c4d589bd26f5e4f47f65d. 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/GBJSN0899905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff587af731a338b66c01bd668bab01e5abad745163bf33eb50454a9cad018087. 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/DEX260901004.