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 0x79d56fd7a0f59957505bde0297b4bdc41dfe247f3afc748963d699822afdec6e. 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/9c738793-cfeb-4b8c-b149-d7734efa88aa.json and https://artists.proofprofile.net/proofs/artist/9c738793-cfeb-4b8c-b149-d7734efa88aa.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 0x326187633c4d9dc8b2ad90365e20a4cfe2ddde1812c8b3e2122c7a5254f40ff1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UST8K1878427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d036d6c0bc1d7253e0824c07a2540509308cc2e20a6ed52759c1f2430c0d18c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBKPL1947708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff555f4c9ca65fba70cd51fc9aba2c70ef571fc4da2f668563e13439607e3931. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:50:48Z), 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/QZFZ21994696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5160a357a1f4b0d20610e0659bd7da2388910af163c6e2e262c2ce136a1ea0. 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/QZK6Q2068155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a7d434a9ce739f869b332667e180996f9b75b460c1d01a9a13dbabbd41cbf. 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/QZDA62184270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be9b0d60270fccc0a7d8b210f6a46091fa15dfba5b1a13d3c62018a0dcc78e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA42142065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdcbf622ce281984a0ad1903dfbf439770785927a273efa9a5e3c428760d1c7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:45Z), 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/QZDA62184271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba652a60f835ef76ad8b8ba474a36c2af8592668b738a1559d02d99f4fbe68d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDY42263707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368419a2f5874441577df81d569893ada630ef1a4457f49d6533bcb782cd014. 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/USL4R2201659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368419a2f5874441577df81d569893ada630ef1a4457f49d6533bcb782cd014. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4R2201659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f7f0b6c85ff86dc8c5967b07ed6d9d25aa2d4ccff0175d10e3f13b1dfa2749. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USL4R2229620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368419a2f5874441577df81d569893ada630ef1a4457f49d6533bcb782cd014. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4R2201659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f7f0b6c85ff86dc8c5967b07ed6d9d25aa2d4ccff0175d10e3f13b1dfa2749. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4R2229620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368419a2f5874441577df81d569893ada630ef1a4457f49d6533bcb782cd014. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4R2201659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f7f0b6c85ff86dc8c5967b07ed6d9d25aa2d4ccff0175d10e3f13b1dfa2749. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4R2229620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827c8682c622f068620ac174d1607a68260440632bb22377af7860648ecf8a38. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:49:06Z), 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/USL4R2256523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708413047be43e3fef7165d492b92993e64ffd60ecc5a2c9b65ffb49053f510. 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/USL4Q2303496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e7fb07d7acf1b50082643bc914994ed8c1334685b6eccb75187726229dbf62. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:07Z), 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/USL4Q2303497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9124ab3466957f3c16252d260c0cf98998441e6f33fca1093ca2c29c29525a. 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/USL4R2331330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8c369f3c23b8dfb0dbea2173bfcda73423dffa61f662cceab06f279fad9880. 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/USCGH2434190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456427ae3d02ad5f5041555f4e9d14e171290308fbf51f8248e6ee8ccf4fcf75. 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/USDY42569619.