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 0xe832ac632df69cb92419e90b5877f8acdb1ec6effdc8ed007a03e71aab60dc64. 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/9b1cc4f0-db4f-47bc-aac4-e9492c0becd3.json and https://artists.proofprofile.net/proofs/artist/9b1cc4f0-db4f-47bc-aac4-e9492c0becd3.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 0x6e091aa94b994cd1ce34bbea94c20be40ad0c3441a0efaa73795072aed1eb84e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2350203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bbe22df85e129560c7815f956bc761fe5c42e67ce271c61eb643bd4ae1c2f5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2350204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58b455488fa1bb053a8c94d4f4aa76f6f02b2f69fc91f262fbc164595f0653b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEP2350205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a842679a4b06225fde46586b21907cb656dfee4fe5b7d8d8cbad557f59705f8. 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/QZMEP2350206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffc30225af95509e4ac9363d8267d23fa5c043a20c9e35c4ace3df8ce884e6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMEP2350207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8a6f1f3192644256dc3d5a2751867773f052c105e227a0b975bf8a7279baf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2350210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dbf00f786df4282075d9673f2ed27c6f9138f5442d54519b5d1ac2fbcb41a7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN82435556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af6b3f8992c0f2a60ce3ddb89e0955504889ba4b6bce89cd32e799188195fc0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZZ7N2418895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6493f09d45d65a8cf8cea639c1fb526862a65a50fbb352d055f21ea524bef4c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFF2454926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71108966bcc2d72959785f6d59f1cbd4c5bf0626d1a02bfe9b03c567bd928de4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFF2454928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298e5a117527b6c3428613de5018a8ea6fd2a4c1e3b92b037481a557ca49b166. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFF2454929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d87a85db06ff8b7233ee5c1416aa825696d89d195e7fd387b5830253604d01. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFF2454930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f18bdf897a89a8e46234159d183fdfc49a366611b9c0b8f23ece175f4f8ec9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFF2454931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729249c97e0402d7e61bb570104df799f27aef8b0d138d07adc9a338da009eb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFF2454932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12560b9597cc5de6eb9c5031efd87abf65ea0cc26a4efba4cd87216927756d01. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFM2406221.