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 0xc120631ce0484ff2d4e57d2d30e77437f6baf7a1637e329088de61e4ff8edc0a. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f7c057-fa94-4061-b8b5-3a9ab7de9a5a.json and https://artists.proofprofile.net/proofs/artist/b7f7c057-fa94-4061-b8b5-3a9ab7de9a5a.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 0xf6063b62ba088ec1d433fd9f2725ba7aa7be67c3b529944d1abc496205b6e45f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADN1807005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c7b9587417a4798fd00eeb3b8b0100582890aa98d997a265139653f543562. 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/QZDA52287377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db6f447b6e203b9abd50304f560672c99c1e052df0307c4ce2be44288ed8497. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:42:26Z), 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/QZNWX2302581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0298a3799de03de9589b5dec2e3986993e5363fa243647135d5a6b680530548. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:38:39Z), 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/QZHN62326947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f8173cbd3c9b75ae71218b2c86653032b2f3b0c0c84824c289038fecf7bf5. 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/QZNWX2302582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91069e1215be38f3b7dbf74d3815174a7463dd3d5e48eb31abc735ad3bb4ff31. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q2310136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8169eeb98c759dffdec9b4b09992fa87266a95fa613fe6b61218eee462580f16. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2368532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649fb4e84e87edb946f4c375615b19845135918c24fa84fdd2ec3377010e0566. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2302586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf54e7948f963767604432d9d25a50cdadb7ec3fec7e0c8617129a995d16f06. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZHNC2354257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a7b35f48a189399a09c74af93aa19b02a16a69db354c60d22410f0bb8472d4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFF2433218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb60b8b9fdf969c578da826fa7b7e084907b6c8cb7750d96f23479fe5e58e32. 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/QZTBD2488928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a1bd094a96eebc901b03f80b8ad794fae0ee738468a86d4bfef86ecde08bd7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZWFF2433219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28285c5dc29597d5207cfd617f21dbe2310e30aef6a2e70952845630ae37fd1. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZWFF2433221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43e6dec8204de667ab8f47817af5516656e3901af2e04069ed349cee528dc6. 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/QZWFX2525565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bdf4a350f2a4bcfb65db8891c3157aa6ae1aa3a7cacc34fb0be1e373d61c64. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7L2559771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6a74c6617151b68b30ba6f70dca549dbc4cdd62861cd01101ec74a0568acab. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7T2536383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3725c5efc2b27cc73b18d036a8e0b5773dcefb6a34df50f93afe9b79fe1800. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ7T2536384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae984cf48b3f5b2df849f1afcf89fd0faff39a175133ea4fbd8a656a7ad8c2d. 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/QZZ7T2536385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43e6dec8204de667ab8f47817af5516656e3901af2e04069ed349cee528dc6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFX2525565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79fdec671ef633f8f7b7f0b555e0f0272447adecf4fde60bfebef7497234eb5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:46:41Z), 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/QZZ7T2536386.