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 0x7937de4f46b99203923be9438cb9ca2a0830c17938ca273dbbc233d9d1aff7da. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c904764-4db2-461f-af7b-22187dbb322f.json and https://artists.proofprofile.net/proofs/artist/6c904764-4db2-461f-af7b-22187dbb322f.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 0x6bcfe101f04fb6e5230513c151bb27ade9001f3b6d1916fc887247023a698522. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLF242211480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6c9f6faca2468e7f97fcb8c24a24ff92bc5b14ed689a910cc9c0770bb92c5f. 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/PLF242211644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427d425c4fd4c2151d083ebfd60000e18774306c8415032d84cf0e015a55552a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/PLF242413439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578b97e845a15eee87c69bdca030834a2ad2b568cba1402358c7c9c664227464. 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/PLF242514784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae5e598f59917ebd49cbf3193299fc3b9493a9c6d255e7632bfbe2f1fdab56. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242211338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe689535c770991aa69827ada0917ea28ce3dc8eec8dfb355a2b8ce8d2b60255f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF242211339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1d0b8f26edb5ce6bad8519cfbd7b371963feb2bc1f887752563aa12a914e63. 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/PLF242211341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790237b66eac3a60955de9e511eaf2d93c1bf00ab3a9c04c413d34805c7c4d06. 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/PLF242211342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73bd5b4ae5eeab29992f802c195b6737b4d06fc5337cc9e85150a2d76700ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLF242211344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7433c45fa408ed1f744735e60f30f16d461806c9bef908a76fea79ed006589. 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/PLF242211546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1957776600508f9fc98f6d9ed9b3b4e3dfc7d64e5f618db1ba4710fb5380747e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242211345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96761611f10856ceb8c91cbc3e81921064ba764fbc82d42300ea4945e89d0710. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242211348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8432e9364ab4ff1df93ea033b46546bceac498e3da2443be71f059f8eebc932. 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/PLF242211350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46338c629184c08bd499a7f0185ae1c96b100e02a764dbfaf64e8b2880645e5a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF242211351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc160d377f269fe91c734c014f5406d11283a8344b37c97f4764a290591b2ec20. 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/PLF242211354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73bd5b4ae5eeab29992f802c195b6737b4d06fc5337cc9e85150a2d76700ba. 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/PLF242211344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6883dafefc15d9d392bf97001484dab29d61b46f619169794604007bda41337. 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/PLF242211402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6883dafefc15d9d392bf97001484dab29d61b46f619169794604007bda41337. 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/PLF242211402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1957776600508f9fc98f6d9ed9b3b4e3dfc7d64e5f618db1ba4710fb5380747e. 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/PLF242211345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb654f32c3dd827d65c49c6da9b047b16513c44bbd0fbe052cb41a6ffd477436d. 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/PLB382400579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f8fd00d9034ada93e0c1d4bf9146082f009ff4718d1a4a2cee232c965c9bfa. 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/PLB382500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016caee597019ed0dd9764ed69ca0dfe87232a8e55555fdfe8738395aac024a5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR59R2463801.
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