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 0x723f93918e2dde425b15f9ba600cd59fbf123f8566bc2ac72f00f4469fe6b288. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c8ece53-9236-43b7-aada-b554602c2f5c.json and https://artists.proofprofile.net/proofs/artist/4c8ece53-9236-43b7-aada-b554602c2f5c.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 0xbb0d382bc4f14c9a399cd978da0e7831b194c836db65cc5338e2faf37422a486. 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/QM4DW1586526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e26abf517999281d73fc5dadc2609be4d803808c5288cae058d070665c4d83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFF2493598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ef1e1571b019f6df0d6a2bca2f87f26fb250945972eef4077fb725aed5e84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFF2493599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7235abedeee571c34220622a4c2c113a0bf631eda86f9b3787570c78685df5a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFF2493600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea638ae2edf67e489c0bfe8ced19aa1fb97bc570f82f6c06a23f024d66294a8. 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/QZWFF2493601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0cfbb5876020ecfaefbe9357a622ca04446ac82ea455836477e2af1ccbaa7. 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/QZWFF2493604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be6d982715fc402fbe9dca2cd56ed35ef94aded78dbf7ddcc1ce132f9f5f4f5. 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/QZWFG2480209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa78599404e9441ba27ae80e61d582cc3ef4489a93a9006b780f7c14e5a08b00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFG2480210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15a812184afd249789c5316835dab1ee4f705d98e3bc7895e08cef0366dcf8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFG2480211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ced2f1051bb452cab93e7e88baf02fcb7e2c84d8b0d6382cab1604bbe991e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFG2480212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a5244dd69d2098a2caf54d6eca06cc3e0e68c0cf590e8b491da1f993f3ab61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFG2480213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c1e0bbda080274a7ab7d97ca4e0c6a7434e19071a69f1005bacb1b3f2712ee. 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/QZWFG2480214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5960e63abefeeef19d3cd02b51fd29097a93946fc147bfb72279ccb5590bf7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFG2480215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b8a5636290e0c03b5503dbc2cf900b38c52de538973900405dca4fb723b949. 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/QZWFF2489764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61394c95c4d6aaca625a6e7017e5cef2c2f134d27cc99cf6ab04065abff3bf3. 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/QZWFF2489768.