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 0xc561a9580cd8701bc7661d1a88565ce2857530f1fc65fb0ac9cd43e2da3992b7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f18fd0-4bbf-4dc4-ae99-acc6ff91664e.json and https://artists.proofprofile.net/proofs/artist/b2f18fd0-4bbf-4dc4-ae99-acc6ff91664e.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 0x45f6ad45d6f06727be715b54db989edfa805d2af63d5a530b9bc55ac9fc8bb5a. 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/QZPY62200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498a3115656b75c7d4bf702150d08da2211fa870f896d11605f88238eb104875. 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/QZPY62200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3d6b45309e496ecd584b605e0a1cdae90e10b28f1f5c7f5900852e4ac79167. 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/QZPY62200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b4202abb3a48700aec2539f02113490d6b92f15062663cead763e8bc371cdb. 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/USDHM1725491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124fadfd1eed4301255cecd8c7f2e64be16cf9a717d0abef5ecdc90fc529f43e. 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/USDHM1725492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4aa541d050d68b9436443c1fa0e2fda33862745319b5a1208b16586d8d67d8. 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/USDHM1725499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7612db9cefe11363201b5d13b420962dd3a4fe470554b3857437a3128bae1c. 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/USDHM1725500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7162ccd01b624e922c48b5281e8dc0b667494ffd08d49c5dc50c04f8e869e1. 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/QZJ842402800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbdc459b54c1af26d6ad46b15a6809dc9f41c17c6700819920049ad74cbf52e. 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/QZJ842401858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac482da64ac9da44bd1bf3292e56b988481d0d64ef05ef8c1393bfae1041467c. 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/QZJ842401859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d08826828af2e84b936d1dae68aa40a0cba12f0ad6858c827af1960ec927709. 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/QZJ842401302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687c50134bec492114452f0292d976c8e260e37167b2ccd4d347c27f6e04ff7. 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/QZTAS2187504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9277bacbf8ee5f9846bde59453c6858b7b3e0c6e45644a19ddb84ac6fef29119. 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/QZK6K2142289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf497b77f07ea8a12864c97155e3b8dbe8d127b0ec45337d152033365e18e313. 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/UK6KW2100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab66835fd9a7bbd96fdaa6f305acd19e478e4d8613feebfba7d8436bd0170f4e. 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/UK6KW2100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a9d440d5af1b1610e3ac606b85777d0eaab62f12626d465b1e2f732cde0472. 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/UK6KW2100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96a990312a94a89095dbd679c52779fe396cd5d09a6401c01cf0df27d13a142. 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/QZHN42111701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49a763cf7bf4f394a002446e9273e45d254ca48ca946e1fee8cdb92b23cd0da. 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/QZES52162939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240723ba7e9b3d305c1c2af60829e8d8ee7f8aa9c3aaca08fad6c7c3749b4453. 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/QZK6J2029027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d443c3d0455c197f4a55324da016f44155ea5753e5e4ac8c497850537b21535. 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/QZHZ62078939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6059adf12f0854466f4983a984422a7640e3486b1b608d9397079fc131e3dd30. 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/QZHNA2090547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1483e6c0bada2bc3bfd66ca09c0396d74d45164a8888ad2fc464ddc7371c8b4. 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/QZFZ22040715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1b049e94d41eb987cc2894f333750a50c64c0ac95d1b88dad5350b82ee3d73. 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/QZFYW2033182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d286f86ace28685b34590e5e052abbd7f70ae6b22c6f6c4eaf25030eddb5c9. 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/QZFZ41988094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4e1cba613d02a0827e3a4276d0bcf79e5f348090516c99ccf93fe893b21ad. 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/USDHM1909155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e0ae8097ff32ab6b6193b6f6df11744267a9d018a4d04d41bbe43bffa2d620. 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/QZES91972136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d908bbe02a372dbbd8ca52d49fb6d509eaf5e23ba8feca3f67968f4225eabc. 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/USHM81873472.