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 0xefbd4699cf36b44bebb736550549f361933f9ba86fdd41d707865926a2f32b54. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04239661-34cf-451c-bee2-ce11a57b8a0a.json and https://artists.proofprofile.net/proofs/artist/04239661-34cf-451c-bee2-ce11a57b8a0a.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 0x185a8146e8fb41f6533b47b406b921232e9ca76c48ef96d8c21c560db4093225. 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/BCLWH2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bc9e30b41a14ad441cc7dc7ef55a9f226ac344c9cb2281a04d5d8adec95962. 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/BCLWH2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0ff19b44f16851792118dbf4491a42689bfeac0ca6ccbae15664bae1cbe3f8. 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/BCLWH2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26267f104168dc2f894741198437903fabc53064811109fa63973b6abc50d3cc. 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/BCLWH2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40fd3faeacc9c505c7a444377e02095029fe388b3dcaa47343ed30f6d8840ea. 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/BCLWH2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab31ff5a1fc7bbe818560527c1568894ea5f101f3b48748daabe5f65d12c8c7b. 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/BCLWH2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ac430e5ea7dc563641d21bc8b956d2f2b0c1999f351f328a2c49574d6a9fe3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCLWH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185a8146e8fb41f6533b47b406b921232e9ca76c48ef96d8c21c560db4093225. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCLWH2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2785d4cda39c48911d789a8db37f53235bf3ace805081ca8f0479844dc1747cb. 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/BCLWH2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f217a443f48816596b02552681dae05f0b8566896b266c7135d9a0c0e1583. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCLWH2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ccec6d9db1558dc5ac47526a751249ea73d35f82b9b02be5773696c7270283. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BCLWH2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac69ee91eccd3540dcba91730be603be3f2c4154aedda977cd30456c3c6542d3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BCLWH2400006.