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 0xe0a9d3f929a0cf775617f32ddd249c71d6dd71820eb2193251a875bf100d1318. 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/3b8b6b00-8455-4024-8078-726a65cf4985.json and https://artists.proofprofile.net/proofs/artist/3b8b6b00-8455-4024-8078-726a65cf4985.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 0xf8069f58dfebd4f12876f4dbe2dd91d95ff66f4d8e56f855dcae9224e793e355. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPJ32259824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223f9d23235d47c70b9a7a8625b69c84029f3b1e34a5c3223e5f4619c99efde7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/MYMN32310024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f5f4b12029321574b7223e2297d2bebc28e54fbc195ef12f6562ed855dd290. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/MYMN32310025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1eb70228f19f6d4815f6c61e0869aca20ce8d015893ac50571313385fc5fd6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MYMN32310026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b368c453c004c3ee06b26ddda2623e96ce88558d5eb63784d1c854a3fbae0f. 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/MYMN32310028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0098cc0219da947f00448da9c976f0d5758c866c8dcdc56233a9d8e5a72ce403. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/MYMN32310055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34392b07f4aac83d16d445308b29e33e89c618bae6ba3f5e0385d2cf5d5cf7fa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYMN32310056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5912131041ef646fd596fd35ced065bac2e17bf467007524b7cafe89d4261c52. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MYMN32310057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa92c9863b7f828aacc97e4470d38dc861d8f9d30bd38cef01d238ae3372684. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/MYMN32310058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b8ae6b6a4826fde3cb34fb2ed3828b93b26aeb69d7b442bb8df3193e131b8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/MYMN32310051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f49e5fe1c7d2c8fa03af780b317254d9bc0bba722db0ba358a987f6f160a5d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MYMN32310052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4001ac1134ae77d53bb6212d6ea56e973e3161355d9796fd11f0fa3d55224. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MYMN32310053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf21472284c2d631cbf13bbd2c65489ebcbfcb11a3f9b21da5ffdadd691424f6. 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/MYMN32310054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726fed29dcc3364e13e1a6b7c5a9013ff7ceb54efd4aae6723b3fc4f69942bcc. 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/MYMN32310066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b2b0f7bc72631b5df33db9862f01005c5149ae0f108f2ea0eec0c6a9b438e0. 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/MYMN32310068.