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 0xed88b98ebfedba8f5333758ffad06dc5a3fa0862982ecf490f0565a2f9fccc3d. 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/e61aee9c-8362-4122-836d-3d902e2e5c16.json and https://artists.proofprofile.net/proofs/artist/e61aee9c-8362-4122-836d-3d902e2e5c16.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 0x68131601d0ac9d47274a23fa52ab3b39a9e65726aab9689e815a70760540f992. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZJG52326412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5f277a0232155ed13448538c4f34cb7c93bfd3bc8f8545855d55e8ded1b383. 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/QZNMV2368275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc808a3684abe988b3c09ba84e403fd4814a4cde24041ec1b3fc4ec3af6b6f32d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:22Z), 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/QZJG52430599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e39c48da231af5553cb6e427dec743170fff0ebaf475a604c493c2df3947e5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:32:32Z), 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/QZMEV2406635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870262b6ee975f7c42d48600fd095245f5de49fda52d62bbe476f68a38603f80. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:06:24Z), 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/QZMEV2476045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b2e5c6f023910202a3ff16db7bcd6f12805ca8fa4e427125924036f57e6982. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNB82484436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01428f433b2a52945673270ae6d55a092aae4e4ea707bd72039d1d7b3c02efe0. 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/QZNMY2492981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137f8cb47a96ad2f7b2bee1e176f30d1b4b04ab26ef7f6b494ffe683a6a5966d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:37:28Z), 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/QZNMY2492983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483e6fe36154c0c112a61026dfeacb88e36dbb3e4a8aac5954874e42d2a94745. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZJG52565479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482f5438c4f15ecd431fb68b33746e6a9e2c81322ff10641b907f868ba77f52a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:59Z), 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/QZL382579601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc767d71574ccf1378a1daabee82428b69b46b5dd21dfe2ab8ca6232e59d19a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZL382579602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c75b9d3ede0453533e14b4200fab239a6d83ad805e0f88f111a9b357a8c9f7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZLL92538496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d892971605c785446df76f424f8a1ddafb8b90b70a4c2a4a31c29ed0520e63. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZLL92538499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bbd29dc4b8b75d042e8f93cb6a6564a390a14cdeeb15bba6f5d5728dc27e94. 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/QZMWW2579815.