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 0xcf9431673c9b11ba3949dbc628da44839dced650975ca9405b8257671c1bccba. 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/a4f63f8c-9f57-438a-a5ca-348a2f7be4da.json and https://artists.proofprofile.net/proofs/artist/a4f63f8c-9f57-438a-a5ca-348a2f7be4da.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 0xc8f03903a73e69eed6c07056b98f15ed40b99038037ec35b1df3f2ab69bf49f1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBLPF6682791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e21244259d86090e4c847b54d4d160dd79aef693feb494040531ffe62f08c6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBLPF6682814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850f07ae3241c20ee6bf3839648210f4428efa4b3697d5aa37102075e173d41b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLPF6682826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4276c4f2cc964f5c4df274918ff0d03f16d5820b88421f37ea090796b4902cef. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:15Z), 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/GBLPF6682850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0df8aeb5c2c72340403255d10d1fb9be73fc1b1368eb85379e6075060b9592. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:12Z), 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/GBLPF6682852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1c3d25709697454de8c9028c9a9a708f242cc49b1d9526d46cda2030cab043. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:56:08Z), 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/GBLPF6682860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cf0c463061ef92adb1f5ed48b1669e25e9365c003aaa16f4c7c64ad7bd5065. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBLPF6682864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2167a38e3b527e176caf411796c030646b1737cd18cc3ec22afb761443f2c8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D1916742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f2abf7d8fee4f57294e3b6843e768c77edb6964995141d83edccdbde69d3f9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D1916747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12460fe7764c9221d941fbd4671968da81a25cedb12c9e9d796c5545ebb52b72. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/RUA1D1916709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4662c4ce2f18066d8296a6321732d3ddeaeb8c2c622e05d21f7029cd4760c8b1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/RUA1D1916773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930ae855402399c55f083bdb74a48ca2e8e8cc418804a01324f888bd2dde355f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLPF6682874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5d8a13033256f84333268a7bc475a0108f1e98863ddcb5ffa7ce01e9f97a2. 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/RUA1D2013246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b003b092d43b5f71f84b865f6da39d8937f08665673ad2c711dc823e589096. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:55:21Z), 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/RUA1D2026251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffd88478dbaa9697a37d0e5380f98e4f017e5f846dbec61526cae6def1f87a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBLPF6682886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b960c7fe0f25ea35dba6598834d648ae1b0c06346112e605ded901fbd5e6517. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:09Z), 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/RUA1D2384222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe475a1ad1136affb1682831fe024c3544fc6d82056e7947464ff0e70cff08596. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:09Z), 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/GBLPF6810986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b780c5b6d8209f68b5e70b19783c06ad340e22ede0715308cee5bd041bb1af. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:52Z), 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/RUA1D2574744.