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 0xeb8b2dd9d026e501404226a511cf59f7699544b7a701e7ff66809ff51ea64176. 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/7f075240-4b3b-4fc9-8c77-561b6efb3113.json and https://artists.proofprofile.net/proofs/artist/7f075240-4b3b-4fc9-8c77-561b6efb3113.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 0x735acaebcd3840a626bf0aa6d479774836df107d9ac15c2e8162ec32eab9fcd1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAFF2005453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c115b9d84b5cd28d52510b0047422f072d886c4f448878bbb94315bba968a93. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR9W12102913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735acaebcd3840a626bf0aa6d479774836df107d9ac15c2e8162ec32eab9fcd1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAFF2005453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9bc6817591bb73b3834f32b0e9bee46db91b8111a2b82fcc72431ffbe1ac0a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR9W12104326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b84f9a648868634f43d2d7fb9f9310e0979ac488f918ae6cefb75c779bcbe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12119466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea364f7abb638bba8d5a850445b403d90fb8c17653c7d8ef7f88f423cee8a46. 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/FR9W12126192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85b9ae13b85ba41979c2e15cc2942ec53d96278dfa90c3e47889430e09e6475. 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/FR9W12123356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7beb8bb6151aab9f18623761da0288b5d53d5b3c4067161af36f7ad2fc42f5. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR9W12138972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c846ea98cd9f3a94cfcc0ef88efcac6ad546eb0c36eb879979d0a927310701c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12143810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449024d3b2546b05ade05067c4df3a9267529ea563943b73ac21d678ea036a47. 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/FR9W12205347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca6e2920aa1ae61a725138b39a245d8df196f29650cdb0ee23cfda395d094f5. 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/FR9W12219770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f224acdfd13540e19462481f35b120f69f64d0e93df0e7577b9768226f14ce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12224775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f224acdfd13540e19462481f35b120f69f64d0e93df0e7577b9768226f14ce. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12224775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449024d3b2546b05ade05067c4df3a9267529ea563943b73ac21d678ea036a47. 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/FR9W12205347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5600773f8ad6f3b02b2e2f658d201b96818965c339965c0101340ea992c62d7. 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/DGA0H2407963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa523847565896cd52f4f34516e5163dd14932a6942fa1e9c85288e2cb1ddf420. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/DGA0R2411266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e68188d88efbe9664a1f5ad27a90fa40b85a32ba6df04cb5ea7ebf08a84125. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0T2429010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae5c098661454d960d781452d67f8721d36d7b3c3fa0217125181440fb143e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR9W12500797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1572e97aa03b776da349722f80d5c7fc773b8367cdb03b480f3f1df9a8249. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR9W12117772.