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 0xb5db6bbe0377efa9414d31d76af74795193ba89db9b0b60466e50d026bf396c1. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/427ae24e-b8c1-4308-ad9b-c1c18da6d874.json and https://artists.proofprofile.net/proofs/artist/427ae24e-b8c1-4308-ad9b-c1c18da6d874.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 0xd38774ab7a72b5435a5a46ee1bb56d2795bc5f9737e71eb53f60c53103e644d0. 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/DEUJ62300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644a4ab1ba076a4c7d21a97099f32f4b795cb28941aba817d64cae9e74e76d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEUJ62300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a82de8ee28ce23837fb0a8cfdef0c3df144f41810671986cdf253263f311ef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZC62322443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaab50f9312d8f965344bbda892748dafa83c7128bc677d5131490bbedefa799. 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/DEUJ62300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec2f066888cd5596f231af73e76363019a10aa9c5c6f8a72d39bd37ae7ee51. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEUJ62300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29323373b91042446da20224727f8d93ed42dd20ef1faae6dbee5f3773835359. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEUJ62300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42bc41052dd0a071687d00a6dd1ae2d6ac94c6866aa210cf530aa464e78ed6c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEZC62578970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274c65df936caa08cf564a3fb37b67a13a00465cc6bf3aba5ad7a3ce6f4d52eb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZC62581402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056017ef324c6723d83e6222e07948b7d928b829be657f30d6d10970cab37f5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEZC62581403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaf4062704c9f066679d5dba0d6b4c24f18893b9dbc304698b16d2509b657d3. 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/DEZC62581404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42bc41052dd0a071687d00a6dd1ae2d6ac94c6866aa210cf530aa464e78ed6c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEZC62578970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef913a777baf0b815c5f71396f178870d029a86338d16a375de77d68ecfbee98. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/DEZC62581405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efbdb446fa6a1024704abf1cfd8e44ca79d759024d43f34f239f7ddfee0e894. 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/DEZC62581406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c09257402c5e6f239a58be04c28600d5da7d82179972562442d3b9ca173994. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEZC62581407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b7f6c002a09b241854dd57f3a271a4cef9d25a999ed40a767c2fc4e40250c3. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEZC62581408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32fe9350e9720cc8063c9832b2c683fa53a23c6148279e5fe1e7be42e25632. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62581410.