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 0x9f343585ae2037f90b4abf56d8fde6e0617927011038e7c746e96dc991eef7ab. 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/2095c3a8-e324-4ddf-a86f-d4275aa19058.json and https://artists.proofprofile.net/proofs/artist/2095c3a8-e324-4ddf-a86f-d4275aa19058.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 0x53b4c9c789c5f3a7c0563d338bc1258187f87eb2459940447fbd6cdbefb8cd7b. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:27:08Z), 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/QZBRF1800762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f480b844b23c23cdcdbda9ec0797ec9f3179126bcb9def15e992d1c730b26. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZES91837061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbfc2d8d536a122d8c52c223a95ecb858de9a6b20cf75a7b8ea3641f7237493. 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/QZES81969458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe708e905ca17f0130850dfdf37beda57630478810b95b1e5e9c799d6891e067. 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/QZFYW1942414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091dc35c48427f8e0fcef9065ba03045aeea46bffa02787e7cf6d692cfacc710. 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/QZHN81957313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470aab51d70ff6c5b0a4bd0209d8441cec2772a9f14231c0077b212988e9e560. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:28Z), 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/QZK6P1962795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ebdec8032d7119e487e679e2a1aaffd549e73c231ec77d163539d693c65b2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYY2085190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce745863abf38cfa06220d1c8dac320bd9c087159cee2065e1185351e74ac27. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ62092973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fa8afcee80ed6ecd588c46f79260edb8b6c4e3c391d3b0710e6f2c20f16dee. 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/QZK6K2098997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b1279cdda9e4b12d5c8bb3f83bbf2876da1d920d27749368ad125f042580d1. 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/QZK6J2087448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8c5de43d7eac1bb66e397cc789eb17bc324e711cfa346d29d031e539bc2c7f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6J2087449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b26e286c94f439988359676a3cede384e962b4c226d4f9af2980348390c6f7. 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/QZK6J2087450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03bf1a79bfa57beefd8d9dca60051086b7376ae13c7b7711f59524043cb5516. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZK6J2087451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f52ffb910241da221ff8518359fa9373a944cec3e37252604eb2936b17b23. 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/QZK6J2087453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fa8afcee80ed6ecd588c46f79260edb8b6c4e3c391d3b0710e6f2c20f16dee. 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/QZK6K2098997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97fe0fd9a96b3bbc1ef089b22a03d7d91d40b97f3303860dbc624d4a909816b. 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/QZK6J2087454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe110d3c8faee37a7c31edb4471215eb3757c895b01656123bd8f480a6a28c9fa. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6J2087455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab166cd02acf25281873cefd152764ea000265f23b3266fbab358ae65602d0b. 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/NLK072100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec036762b30fbfd268cc261db33b4d336afbb029d5ee04e809176e4c3a4e7a8. 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/NLK072200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a7b94a80d3e5bcf9f3ba9b3942aba7435efeee19a52fae4bae82c4a64c005. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLSB72500239.