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 0x76cd57c18ac45f6510d86459f33b76080255f14c2050818852f51420842c7d0a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61ef1fea-1024-4ca8-aaa4-38136f943823.json and https://artists.proofprofile.net/proofs/artist/61ef1fea-1024-4ca8-aaa4-38136f943823.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 0x6625b99acb09f8a49497aee3da4ac9a54d52e6b8dab97f2f2850362285068f9d. 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/QZNB82263975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928ace430138d045bb3d4f396b46b1fd4a1bc5cccebe7fb29db7e66c1a4ab963. 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/QZHNA1957350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83041061def845d49f901ed839bf6468668f384a25addce62513125b161aa801. 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/QZHNA1957354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613ccd76657ac54e409da3c5085488262e6b19656695e8417612c559ee22b7d5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHNA1957353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b5fc2849866fe84d4eecba587058b15952205c9ca6411a7c33101ad5f507f. 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/US5ED2406957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85753b163c6cca2ea56b6e19e19350caa06de7500833258178347abe7ab0812c. 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/US5ED2406310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ded40a9895bc241443b09301525067fe3f9bce79300a6a87b11a6fea2c4ee0a. 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/QZK6P2212057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1aba68cb2c23e3f3ddb87a30ebd6501d08d88cd1a62edac6270113e7e8bf30. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN72128605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda857ab83dd6605b2e501ddaa843642a1bc016c957ccbf3208d68a239905bc. 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/QZNWT2056438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0b0b6320ef5d5ba13b54677c41e584daebacae98fa8d1906faa6d05983a97c. 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/QT2VB2429180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbafe97762c47d75ed726fb45d0560187b7ac46cdf16e5a986d545400a86efce. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHE2304351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b353565d645638a3b654bddc14b595c635d59934fccbf54cdb147b941bdedc3. 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/TLVEM2469779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f747a0f627869c36a78b3aacfeb24ae11d78eaef04b47bf98fd7ce0652e0ee8. 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/QT2VB2429181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d0e0bbf7a34b476c8df2ccf25e59bdf007fb5e5b934ed3425da3cf0f947b9f. 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/QZVEM2389642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84723f216e659f6f4031c8c3a4c0882441e94d70eeae69c24fa1b3d6a8769803. 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/QT2VB2429183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ef71ecfa41031c30e43e77d293d3c25337fd97c4896fdd0c8a8cbb54046078. 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/QT2VB2429184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b353565d645638a3b654bddc14b595c635d59934fccbf54cdb147b941bdedc3. 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/TLVEM2469779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdd35c231b3bb2955a97e52513a344487b7ea134d6ae85209aabe452e7e1260. 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/TCAFQ2198021.