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 0x7928ff4ee187d28b7d3193cfea5dd27f45eb4eab06675f35b80f4249a964eb88. 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/adf2d69d-ce4d-401f-a442-18fa03e73ce4.json and https://artists.proofprofile.net/proofs/artist/adf2d69d-ce4d-401f-a442-18fa03e73ce4.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 0xcfd4a24937015bf9d0303634ba9eb1b60c3bb4b895ed4187d80d35be330930bd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBS5E1100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf061f48c33f90a9590034fabc8ba08877cda7ec39b27f26e1c488f8a242a28a1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBS5E1100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469bbbdec6d75710bdc54d3a353c8b418267914c476f41c6aba23e2b29b016c9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBS5E1100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bed738dde8ec859e513a91b6dd5de033029b818bbcf69b33db758c8af096b32. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBS5E1100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ad534f2ec5b3c3face854934c7ed7964fcd630e6a6a531e87b7a6a9557316. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBS5E1100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e139aa0f7c08b909210c4360ba3e4912239dec2c83e54543366806cda11af0e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GBS5E1100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ae37598dfb42d65642ccb9de737fdb727e3c985bad571dca818f0e5551a4db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBS5E1100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd2545700829db42a760ec52651f686ca6f73e420abd9a999213cc2762893d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM24S2003891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638f945d258a663ef25ebb443a42892b64eedd622b6123e125ecc3e1032f6230. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM24S2003892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041018dd6879757a3ce2d5c31398d7ed60442b0aa3208da2a76b495cd969546. 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/QZFP51946336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067937b81c673b793ae5e2da9755534afa47ded2766c033ab4e8b2bb25a70594. 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/GBS5E1100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced9e7b9d4d78bbacb9712aec0bc767949aa33d09958c40e7f1e1c38e61300f. 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/CA5KR2069368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2474f4fcc9963d363d8ad7b16a6fbf1b3c5017315007d87bb071d9782c75f581. 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/CA5KR2069367.