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 0x818b1bc1570fc339cf0306157718ab52585e8a71eab9e167ae6783af7f0a38de. 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/bb04ff07-a07e-4bcb-93d0-dbdd2d6e3924.json and https://artists.proofprofile.net/proofs/artist/bb04ff07-a07e-4bcb-93d0-dbdd2d6e3924.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 0xd11a9ae17493e630ea1ec80a8831e9c3771555f554bfcef3e1b92ddfe5b7372d. 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/UST8K1720682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904c0d82a01960ac9882dd5ad70dcefed9cf4fcb7ac5fcc248ab7141731ffedb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHN81989717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe465cbe31e52d4c1cbc5a9fec393c9d990da7bf96e61bb81d9eea670ce3313dc. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZHN81989720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd374ec892e3a6480e067ea2f96ba8c67ef61f3176e051b012d8e40e8207698d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN62081209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84b4a6d62c92f4a0b8d8171037e2e631a3a25c836b8c9c82299bf261390ce61. 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/QZHN62081217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e2180bbd5905c6dea1f2b6f10018a77f8c0d30de10568ea69542e763a453f1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZK6H2265101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2a7f64dc3870d1544a42b44ee36aafbe70d316793b1ac65ab5e06636781031. 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/QZK6H2265103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dfe3c40b0e19562b8da373113a3aa62cd0d96ded26315fec74051e0c0fa4b3. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/QZWFG2446997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956bae331de3d4e5474c35d493a383496cfeefd05ae8ad3821568dc448fca29. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB62531114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d92db3371720727f0563c02ac4ae9ed94c46d6a16f7ddbc68742c538a96ae. 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/QZTB62531115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe837d1e934c6c0ed8da70983eeb1fc2b4fed6cc622c92c646ca68852baf900b7. 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/QZTB62531116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de70ccc4268b40079fc3c8887d5afe7f7913a25b428b76872b2b7c093439d8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:55Z), 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/QZTB62531117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349df754a3dbc0aa418c86f7ff1de9e4486f478f6fa495d0410f0dc9df41d468. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB62531118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e00662507110c95fb9040620d201cad41c8a2360cfe6f0690f4c37c2e6812. 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/QZTB62531119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae761c3f94a1623bc5ef6eb54039b3e38c727da41c911e6507dfffe444a818c. 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/QZTB62531120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabf2ae1e066c8dad350e75fd74389d79ddcb56a728b34013651dcd981aec2a4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB62531121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c551cb46be239b0d5072f60a4b49dc463dc3f29a2dd7c5300c6dbbe490514. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB62531122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b749cc9dd3d68aad249d47aa695f8170a4aea5461ec323cffafa6d8933d606e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTB62531123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a9ef59acef9458f781c63ba4987f2eb09102f3560fca6b0a477ecfb8efa003. 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/QZTB62531124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4192788293160afd3bb5e55c4f4a61edc0fbb2d7a99de5f3aaa2fd30f778e8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:04Z), 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/QZTB62531125.