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 0x5a0910cdd5c5b7b8031789d1523c30901104d7cb56bfab84e2d89627ee9d7442. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a692407-2442-48cd-833e-87a3deb58753.json and https://artists.proofprofile.net/proofs/artist/1a692407-2442-48cd-833e-87a3deb58753.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 0x90cba599897a304a9305165771e73502b31ca6e4ec7d8ee4f54fb7d97701724a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:29Z), 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/QZNMU2582883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1c94ac4de2fbb94cc4acbe0c110d005315502b7deb86ce6cf93621cea9082. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNMU2582898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf140e58c32d599fa451d98d5625c469912b15c78b2dcb0310ac0cc7aabe73619. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNMU2582886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d2736d8f2017a67bb0117fe70b43de886acba67e35896541c97ddd9f9c995. 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/QZNMU2582887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e66e849c6a7f98edf4ab9fbb3a4ac339ca1c4677def654882dae12dfa6efd. 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/QZNMX2537434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e24f7bb179c9eda9760495cf0a03a01059ad38ad3d5478439f325c0068acb. 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/QZNMX2528586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f3001c67461614c7b158fc8deda72aaa4fb0114fda58c38eb235a2735bc565. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNMX2528587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1224cdf12c84b423b1b66d6780ae53ed4c2311e2f755f46f831790b4781ee2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNMX2537433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc469ff4f99e569fc384dfb0cce78c7a714c78d66cb839884b8a64899f6010eab. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNMX2537435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7393caf1b52bdb6e932e710ef786b7bc885d00f236b647cc7942bd8183a47fe2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNMX2528072.