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 0x9abebac48f7f08a07f92cbb27b6a9573c6caea57677cdacc92e96aefd486b6ac. 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/e6c0289b-6db4-4e57-9d45-a38b60c11a60.json and https://artists.proofprofile.net/proofs/artist/e6c0289b-6db4-4e57-9d45-a38b60c11a60.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 0x37f8ed3c9c6fe1659985b187a315853cb9895ce62d0294b725645d2b9c542754. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2349057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387bbb262f9eb6ef2aef32b7fb5471650d7c90cdd1e0380db967025c9f02ae85. 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/USA2P2400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e898d7ce1aac2c1953515d3d1fb0c8a0471a9e143d052609e477e509e43706. 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/CAQOI2402805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455437b0ecc0ed954651dd85df5faadcafb417d9626062fcd651b9c46f8314c5. 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/CH6542384865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351d4413d4508e17b0a6c10f0ff739264032fe4b42e08a58f8fb05fc3e69440. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQOI2306184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe219259b7e7766d30f91df0756b00420f7bbfb5c6118998959c032cf2b8d650. 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/USLQ22180607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2ecac1411b015cd459e9911cb3154baaf81dc8d310c395a046e8f6c2ffd02e. 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/USA2P2317728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e270141b6ce9e1f63f927ebfb37706812fefa2357ff180ae0ad66f5b20138a. 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/USA2P2311550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b82c7e7cd89f940b70a84db281a2dd93af3abea9d3a0da280f63d235c773371. 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/USA2P2240544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eab25408eb6b5b6812eaf605ce7498c8e1f0656fe84ad89c444afe726e74b57. 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/USLQ22180393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb0cead21daabfe137e2e75af60d3f9154b11474e73dccbccad1c3a2cfef201. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR2176272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c99562175ed683977fabe5013677c461ce528a7966c12e56f15f7779d4ff7b. 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/CA5KR2130387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c90d67c2044ddbb82da024672a65dbf509c085ae62d1cb212596a9781e0c44. 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/NLZ542000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0939c2af3f59b90f8f505aa012680f098f0ce162e089fa33956d3a4a058f1671. 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/US3DF1851506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5213fd444680565eef751b4066430a1aa82f8dd6839dc67069ecb63390a3a13b. 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/FRX201612447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efc793f95657495b6d247e8daf404e8d79a4af46f440a02b005ceb763418068. 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/CAQOI2409766.