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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1616fc2a7c4ae546d2a3ef11e80e51e50d8126ea303a8c22d202cdaf19c440. 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/5797d8f7-f100-4f97-a48d-01f94664bece.json and https://artists.proofprofile.net/proofs/artist/5797d8f7-f100-4f97-a48d-01f94664bece.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e1dcf7c36393694490cce8fb45af0e231efaf742df423b201599d024900bd7. 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/QZES72340404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476aebdd99258c5fa5677b96363dfa13b95c34374a088c19b5ffc8c5146f3a6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZES72340405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ef62faeefede4db8d3ce98a113277445b9b58441303dc2a704af759fa99637. 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/QZES72340406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4515a71df6d3a0e091149166121a3a1a1e2dda635ff98458fc941afe0359035. 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/USLUU2300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3980f41372af32f8219b7cc539a22577ceed51068b52898c79055e3ba8629bc3. 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/USLUU2301621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7dd56c21d9b7dbb030d6f935b149a8065e79e73d8e54ddd15a92749d133ef. 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/USLUU2301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2489b67a56daad64accf9832dc2100cfcdc7edbdaa4de6c191f687bedaf284e8. 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/USLUU2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0041dd02eea88d0a837552ac2f5893fa2888a538754b7e5b6a82f62730da6b5f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USLUU2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3086d14c6f360729e1e068b1de508063e37765f0d432bd05d961f765f5f1054d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USLUU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e178377c78424093d580454275d9c10afb13402709ce59141342848df13bc38. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USLUU2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb518b3b2babf6ae350542cde07a29d99c73805faca31d6895191a785462d91. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USLUU2301991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a503351eb75d26edb4f246d4adf5b88007ecd635e0e2b3ec495d73050ae083. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USLUU2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7dd56c21d9b7dbb030d6f935b149a8065e79e73d8e54ddd15a92749d133ef. 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/USLUU2301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae4bff246945d4303e09314272f6f8f21793648159a8fa09c1ad1bbf8455f5c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USLUU2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8772d7873197c37ea0afc9c5fb3e01d5ffed86a5d0a49e4a64190a8e801462. 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/USLUU2400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff36680e7b80f582c9dfd92edf9904d515645ba65c2ed007f89a17c89e3545f8. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USLUU2400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f9e7f266c983f7190edf119be00f30fd0569f95da325bd7b880a5f867c32f7. 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/USLUU2500595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1207cb6b3b47be13cf39476c6ecb085fce417265ef4125bf89da5e37330a985d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USLUU2500728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc23d2f3af2a07de7bf1c5a292d775b5d204c533160d9c8c17170253c677d32a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USLUU2500737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4515a71df6d3a0e091149166121a3a1a1e2dda635ff98458fc941afe0359035. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLUU2300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a490ae515848b8f88d0546795c8ce772677036343c3976fbd3529d13cef1bd9. 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/US5ED2406291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a490ae515848b8f88d0546795c8ce772677036343c3976fbd3529d13cef1bd9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US5ED2406291.