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 0x47f187074fc4b49b9b9d445b2af3fb5c26370571c9ec7b61690eb467376d216c. 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/503be0b1-10c5-40fb-92c2-2b5fb9036bdc.json and https://artists.proofprofile.net/proofs/artist/503be0b1-10c5-40fb-92c2-2b5fb9036bdc.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 0x66c7c5a8e16b78304698649733e0facbd05c835270e7eb7873d253ebb73e7921. 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/GBLFP2387485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04d553f1ae039fd3751c9148b2eefb00cd1a8769cbd3ea879e03009328ce6ff. 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/QZNJY2423105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb9160a7fbd63c8debc0ca75a4fd7ab1ecc60dedefa7ee2e29c7865d0041d33. 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/QZN882413229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3d275f3538f4b8322428735bb0bc520d4d8ee43bc75e5823e9692076df5fdc. 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/QZN882413230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1b8e1be32fd66fb0fccccf022d798ea1a93feecbb2cc29c79a452865af2f03. 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/QZN882413231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabb40376a0e7abfa1c54aacf5653228b9aa48e24840ab4ee65e6ff71fcf1c2. 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/QZWDW2434733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67441aa584f4e619cad27fba18ee8810b27d29da34953948677a3fa76a4fe70. 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/GXF9Q2438673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabb40376a0e7abfa1c54aacf5653228b9aa48e24840ab4ee65e6ff71fcf1c2. 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/QZWDW2434733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99d6bcb7af7af6d1fe50dcb53ad1bf4f58f650a163c4a07ea8815ff3b07055a. 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/GBMA22308338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21daa3ad622fcc9f0efb5184e8a9e0685ac893e5d2c32c37097a60c11ee3243. 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/GBMA22308336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3679d61e9b8f1ca80e54d03a5223911067446c15b4a3761fea31f6681bcd8. 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/GBMA22308337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad89c4fe2e5221421f145cf8f07841f4fff2fac60fc67d302939715666b6893. 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/QZN882596391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb499aa7e8cd29093eb0b1a6773c291478baec8cc53c4282c0362a5acc6d23485. 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/QZN882596389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342850f9d1b6accba2120131ffe58f4782fb393612f4b700ea2ea35c9ecf8e18. 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/QZN882596390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8979783bad4099cd6092c711cccab56e33d889fff5a88b7663e5f97927da8a4. 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/QZN882596388.