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 0xff3e1d9d2af739a44a2cdf2504f4b4cc87fb9a229523b5509edd7ea5381c3ef0. 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/b3fe0444-40a8-4f4a-aab2-7731310c0231.json and https://artists.proofprofile.net/proofs/artist/b3fe0444-40a8-4f4a-aab2-7731310c0231.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 0x730ebcc4503f45b0740adec2765899a314b89741d3b5bb925f9d302dba1f80c1. 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/QZVEM2322838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337dfae96e550c31fd2a21d1c0d75f562d6f4a12402c422e0a50c1a260100d7f. 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/QZVEM2315563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff1a3e5000d95acb329683ca912b1d5a23c302914fc33df0bd254850c76c7d. 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/UKZGC2204004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7819edfb59c4158b4d14f1a250abaf15c10ba1fb9954f89c82af0902f93314f. 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/QZHN92344674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeced3611b884d023fb77499c07f35d6e2c75608d1e67fbc1bc594678609774ea. 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/QZTB42445706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ad78cf7aae2990fd3ab982743030f39950bf32ea1814c55a22b966e8c4bfce. 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/QZK6K2401437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ad78cf7aae2990fd3ab982743030f39950bf32ea1814c55a22b966e8c4bfce. 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/QZK6K2401437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf7c72a5eb1e78257246c127bb2de56beaa73bcb3377c0a235f3a44bc052b8. 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/QZES52415764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647acf2fb23d422d2464456939537c8952a3ff6cfcd91ba536d23b418d82ddb7. 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/QZFYZ2415263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50d2bfb6002090ed61561701fc8ad479bb8daebe6e352a652b977a142c62e89. 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/TCAHR2346607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdcd3490674b7a29e7719a670357729828ffedc39e3f2bd71dd1937dbc25c96. 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/QZTB62320463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67809ba60c91353240b4db27ff377e99a6754840f13837f61698b083dda480c8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRP52365823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a75e53323dd5ea131e56747e03cc4fb8b76724e50bc3f33b1cab23b29e55159. 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/QZWFF2336847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b59d8039ed5e7e67d51b82d2ed59c84236c9c608362b485a8c574cc69043f3e. 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/QZWFF2337982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee2c089a0504bd62ee239ebbe1ad28b53f5689d3c659d78baa6e627d76a391. 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/UKZGC2306688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c37e799f98471cc617f526353f14fe9b2ddd0f20518f0baf7f357551e0593fe. 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/QZNWW2218584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2852ee109866735ff161981bb572f1cce28e4f9721fd03890761d9f4c4fd096. 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/QZDA82205513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c0208b21bc51b7989c116dc290c217da7c8cbe512b3ccc15ca9018b3aa09a3. 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/QZFZ22277987.