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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550c70a2daad6945be8298577d07ae98748676d7ea0b7e0aba47e70739bea9d. 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/83cc3f71-60f2-454b-ab30-86dde2df8150.json and https://artists.proofprofile.net/proofs/artist/83cc3f71-60f2-454b-ab30-86dde2df8150.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09868750cb830b90e54a3b44df378010cf4f5404f9edf1837d69e1cb254dfbbd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA012146691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ada8296ea2518a7bea6d53f7c6172e6e37ec27d05ef0d82929ef53938b4596. 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/QZMZ92096842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22c9946e7d8b48f57f1d878cbafda7abebed99dcdef135912d1e7d792498e1d. 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/QZGLM2009291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b8877bc8a3508a0752474da0748d4ce58982324613b249cd14a29e0989fac. 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/QZHZ41941808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd467c72b639a42143cb04bf371117a7534568ba3f56ad33b134dc55f1a1eba28. 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/QM6MZ1943608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536db8e565365c76c81e02b8af52d6f3292d6d8db18d6a428fe69da197e62a2f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7281881484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5813ebf1e47a6561abb57c0e33bbd4ba0e961348bca2c65166a7aa8402989ee3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2033382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af502ec62f602e65200d5284ee737c8dcc29b5aeeb2ab5422345f82bf70550. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2033383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fc9b11d6ac6f28efa860073c68b68e44c80c1f02ce40a4d6033c351b26eee0. 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/QZNJX2033386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693c3ce0d8ab72d49bfa984498e255eb14e7edc544982574d3990471f4610675. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2033387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebee998cb7ad7087720d8e6f742f5e7da97a938a80ba8231aa0a95f29fc3bcf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMZ92099950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8382eec67db35894f65e8ec47d456f532f0f4aba554d904d7061b3deed76c13c. 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/ARQIH2190266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e61623f79bfb82667fea60c62d6afb5354184e43d6b327ed2143a840f8cd47. 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/ARQIH2190267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455140a18a5d59e20d728dd87882272209851ecbe90466a608792180074c5652. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARQIH2190268.