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 0x0e5031be0b92807e004f9bd3740bc64444ccbe56acfee7474238d44f76c7b38e. 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/770f497d-3087-469d-9541-82aa2ba18d5e.json and https://artists.proofprofile.net/proofs/artist/770f497d-3087-469d-9541-82aa2ba18d5e.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 0xb0d1fa0c8472fb9a59edb7b3ac4b426e6d3b8d252ec85fa2e471fe0a69374269. 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/AUYPX1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615cbf6ce3bffdb155ae16de15928c6ece178f3caa341516a423a4be6916873b. 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/AUYPX1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8486a6cbe3d485b2a8e5083918b8013614dfa97af584584ccddf759e69ca16. 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/AUYPX1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de19f18838fe4f0f6d27a62afd519a7b9a735b867355496606d55b9415324d4. 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/AUYPX1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb08cd1214422b10facec5e4e76c1e7594849842995f5676563cb165e42a8941. 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/AUYPX1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87016a32ed4d6e74ffb5bf68f587bcc738c5fa1349fae2897b57abb7a9107e3a. 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/AUYPX1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c32b1efcf32dd9256d459cf6bb9cff1d928431efd8a2772a0537097658d277. 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/AUYPX1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c16705e2102be8f9bc61d7d9b398d18f71de080c5da81b2fa8e4931ed8e380e. 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/AUYPX1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa850700a047b7a1624501e0230cf932f6a3e4cce4b3f9d03618b98a4a07469f. 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/AUYPX1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c57c361175e10ec18f98d6dccf4844d56843bab71dfd85b18ca3ca179dc410e. 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/AUMTB1800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c200f66baa90b1805bb7ce6cb6becb189302c04d2b02401ca63ad456bc371. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AUYPX2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb992e7ec51697f820b0262b1b9b764faf5ae53674d29b1fe90b0e4953ef906c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUYPX2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76328925be2ad0ad1a9338ff187357e763206ca6aaeddd46b15f7eff7cc07894. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AUYPX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f501586cd22db26077e7dfdafc7ab0b9e57671fb50f74908d3f622128a2bf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUYPX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79551c0de8b2196e4deff80ef4224737b27cb5515191a0522841412a8c7c8e2b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AUYPX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c57c361175e10ec18f98d6dccf4844d56843bab71dfd85b18ca3ca179dc410e. 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/AUMTB1800147.