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 0x575dd7d3fc037541021e9fe1aecda71a2f59d15ab93c445ddc6634734d39508f. 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/49ad6eea-d511-49c1-82ed-59651fc6665e.json and https://artists.proofprofile.net/proofs/artist/49ad6eea-d511-49c1-82ed-59651fc6665e.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 0xebcc77faa17a513a88da3a9ed4c37b3a878044ed3202134d36f634d667a966fe. 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/FR9W12307515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a3dc4e9dc342beba51adf8bd39bddb64b1500ba2fc190b293e3a50a8b942f8. 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/FR9W12307516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90415796124de45941783d2b1acc8e615e74856b408498ac4a0c98a96f2b1da. 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/FR9W12307517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecab85a592a586c608f97456f6606d030a4066ed2759c7e32b77431c0a66f45. 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/FR9W12307519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79838053eee7ec511eaa9ec804614d45af121125b4f3980a909c40ea026fcac0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12307521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0556686983dc4ad318c97e9a4cf686c7885ec9b42ea5e74b546736c3050fe97f. 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/QZHN92112786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3b1af0c6dd9eaf510fcc1652212bf7e6eee63ca49b1ef0f7e887c462371c89. 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/QZHN92112791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271af5f712e02bf7afc80522a2b5fbbefcacdb5e6d1298ec0b8609f61323c6b1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR9W12403981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98095b0420e98d3699e05b479a91611a13a312582959571945133cab5a18c5. 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/QZWFJ2340022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc3e796bc3f926a36d17fe5f3248bed07e15a489baaa3131759ce323ee6bdfa. 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/QZNWU2351877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f3048e25bea45d3ad55066a04708d257f8be9cecde21b16c3d197712ed7f5e. 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/QZNWU2351878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cbb5c955b462f3c528a914ea4196732e1295f3ea67b2d0090743291b06b807. 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/QZNWU2351879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79838053eee7ec511eaa9ec804614d45af121125b4f3980a909c40ea026fcac0. 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/FR9W12307521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcc77faa17a513a88da3a9ed4c37b3a878044ed3202134d36f634d667a966fe. 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/FR9W12307515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90415796124de45941783d2b1acc8e615e74856b408498ac4a0c98a96f2b1da. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR9W12307517.