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 0xb9043b0387c4ba9bab59a079077d70d14b7c873ebe9f2bddd42e425f115bcb72. 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/3658cfc0-876f-4c1d-a572-4047b09990b2.json and https://artists.proofprofile.net/proofs/artist/3658cfc0-876f-4c1d-a572-4047b09990b2.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 0x9427807e98f537c2d519910a7cff87b3209506f1a68d8764466d53e4158527f7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX8LD2359760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cf7345089c0f89449ced479caa93a7b2e987891f447d31897de63d8c833c8e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE6XW2375738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d723eb9d5e1fa85582a32faa168c12d1db234c439e759f57a1025a40a9f0c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6SA2306661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d81a5ba08f4e489fad04341890e5fff8911b87deae29316d1209f4b0b334915. 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/SE6TI2336372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889b36445edb48ade75e0b6d353e145fac8b187a6d70449873fd181cbfad9383. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6XY2320658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884274296c3c95eb057c5921f23c581d2bc05e6fc4fb5e065cd244c85001713. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SE6SA2340039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe602576a77c81057a97078735fa6e82abf0789a005909b1fc2f0e1d984fa74. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBD2311583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85266e7c50007cecdd23d93d2919fd769f3682ec79a9ef14d367e426335fe1f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNC2497114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cf7345089c0f89449ced479caa93a7b2e987891f447d31897de63d8c833c8e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE6XW2375738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6334f6cfe533001f5c3a33ac7c3b59dc138aa22bbae8ce7cf5e30e4117c11. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWT2440959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64424222b20b9b65702870920e52d6f5b9193bd12b4a9636649f4f7f2e7edbe. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWT2440960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326572a792a4116944f8ed53bcef7a608d57f47f97616bc88edac3ef98052c38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWT2440961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ef17276287ac80483b3daaaca51e7837aae951ee9c01eef6193099ba0a8ff7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBB2483309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec65975890208bab580812cdb17c31bc7813f38d0f91a76548d9114e1a3162c. 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/QZZ7V2457635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e3d30703c0800e2f217caf34c29daaa0282e666cbbd2594004a851349a5b3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:31Z), 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/QT3EY2571038.