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 0x4b83d12ba1ae2031901d86cf7fc5fb4bf0add188b7034ac137b8c1924fe8082f. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82e0c329-009b-4548-9970-951535ee5a8a.json and https://artists.proofprofile.net/proofs/artist/82e0c329-009b-4548-9970-951535ee5a8a.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 0x0362e0f0eb7e469a2249d5763d12a5be5485b271b7f1b453ed2e73540f32e1f5. 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/ARYJX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed85161f5090eec0520edf61796dc37cc02472d15fd9b280e14752673b10c2f2. 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/USLZJ2399766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb43568c6abf028cbe0a8e5ad54989d824122da74fa5593b635d3652a424e65. 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/ARYJX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c875d13a043d05b243eddb42138ad0973fcdaf1f420614decfcb58837ae41. 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/ARYJX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ffb9ea9219098616094e8ac438009b52fde951a2af0b50c114a1343ec03dab. 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/ARYJX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fd40ab5d4fa1907ef1cb574c5350dfc4d9a0d33b55d2856b0df359049eaeff. 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/ARYJX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ba06f4c79d47837471428e363b2b983ef992ca625a3afef16d20af35f10f98. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARYJX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bc231c7d07e5443cc1b503baaec7dc5cf3e2c94953a57c798f93f5bf64ed91. 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/ARYJX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e2d06e98d72ddcbbda7fd66f9d99e174a5fe4dd10d87d5883ec481c40f5313. 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/ARYJX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb13462428566c09ccd5b16237c74ee34c997fc56783147695c119c20ee5f02. 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/ARYJX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473ae817d91c878d370a8f5968870ab3a1fe99e967c45192dd0ab7240f4d3221. 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/ARYJX2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793da6bc0d1863a9d0922ec88a6f427403db07044ceab4dc8599af1ec384d39a. 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/ARYJX2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b888ea922672c4fe0c64ae1371c4e660a341ff8da4365029d94cc90c354d02. 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/ARYJX2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0362e0f0eb7e469a2249d5763d12a5be5485b271b7f1b453ed2e73540f32e1f5. 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/ARYJX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ff015b83a09ab51f9fa5296e347599ef1af433fdeb53921203b435e78b759. 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/ARYJX2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4953686de7c488be41e7340f90a9b9f84ecabd5ecf5dfb13267c1c861dbac2d6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ARYJX2300009.
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 0xabecc8fac22cb33eb07978e2315a1acbbd48d7c596043ee8ed60076406ee94c6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ARYJX2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc04b354400ae6c448bc5a447732711abcbe2a7afeb2dd4f4056605e150fd87. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ARYJX2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a8f2cf9a51a737df8207955746ce02efe7d810028bc2eff708e4829c91e1b3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARYJX2200003.