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 0x407c1619d433b70084cb61fbb27d4802b7d769acc77e09f1b145ed860c9eef73. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a820005-ef7a-4c93-abaf-a23360fe2420.json and https://artists.proofprofile.net/proofs/artist/4a820005-ef7a-4c93-abaf-a23360fe2420.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 0x5e176ff05f811c25f94135d84dae7d333dda295279159c602ded49f6be889a9a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:39Z), 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/QZK6J2410962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30f0fc4e42d3bbccb666e7d707092a0a75a1222b984e181f7e81d11e13182e5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6G2473207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35baa97d19e49fb95c5d27dee084c085e4758ba210e943c4e48aef18d1d692d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:18:50Z), 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/QZK6G2473209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a9c084501663a597a67567f51585135758bb92d7243967f2cfdabb243b9569. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6G2473210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d3cf15ef1bf477ad15650c1a3346f6c0543ebacb161376db5de467d18f36f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6G2473212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb526b8d4f639c6c95db2ffbc7aa02dfd6cc711e42873bbb5b1da8ef133bf2a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6G2473213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733740a0b457fc7629c2210886f27350a592b33440600abd16eef4f6d6f17cbc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6G2473215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5154320824cb4698e8adc985439cb91cd15d90d085ca4f364925666c86890e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAS2461384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb44ffd87e8f7fe5746ea796c196c86d1929e37fe7f72e4f56b42249f094b95. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZWFS2406235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d52f3b0615b2bd5fbd1a16c1a3469babe7b5c739cfb4183b921d7970f213e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:43:57Z), 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/QZWFS2406236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62184b0fe696844bcc8b30d43192fc1a4d6ddd219c2f228566ef3585f3ae4502. 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/QZWFS2406237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f26358153c1b2a0bdc82fe64df16c573486a79f7006a6c35dfcd16a18c920ee. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFS2406239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe676fb70058527e32e32f82427cf59dcbe41ab861e558798dd03b4f9f8ba064e. 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/USCGH2482627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8a86c406ba8394bfcf68705f2f874f10e2af31baf480fccac2ab5b45180d4a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:33Z), 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/USCGH2482629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffdd50d7a92389e7303ea62de45667bc292f2aefc9de9f4615c725426f4e470. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:28Z), 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/USCGH2482630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3f225a1657158fc985066a821b111427990eae8783215452c2ab2ebf085f0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH2496052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebd35e0157ffb0500b8e78a0539d3e6f6e00b36a39110bd3ce0e4f63b25a841. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2496054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423256f9ed314ab71050a5d2837a0be723156bd7a0812ea488f62daf8dec0f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2496056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda6b87623b11e43704c709cccbbd3aa39054679b7825165f8d5be6cd3a9861c. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAJP2510045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9028526e0cb4cbfed6aa3617d3637534a5beeabaf69a81c53e4856b7b3b7d4. 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/TCAJP2509727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa3aeafc623a0fc1a638935f0b9548e71b1063cd8702a607d8bb4534560e38c. 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/TCAJP2509732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f1802633b868396a2bd2d5f7eab7c689c7bc588e9bee8760791468f5c8f60. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAJP2509743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38a7a3bf157cfe7665e047f91d4c36eb2568fc4990fed59e357692696c6f12. 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/QZNWT2588168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544583e6ed1bb0d8203bab937114c799e736bf2353a33519801fd24bd14222e5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2588169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3b2007a27d15d63d01e4676a0f3b2a43abdf72f598c81746491088f2d4c7ea. 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/QZNWT2588170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ed29013a2b630c41e322d728527b806bb8177b23a9ec0ce8db867aea39b5c0. 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/QZNWT2588172.