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 0x49254d22546f01e1f927389053563a8cc4fb5726dfd17e0d9c74dbbb9edfbb27. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d93921e-9be1-4e3a-a15f-77f3bb3380e3.json and https://artists.proofprofile.net/proofs/artist/1d93921e-9be1-4e3a-a15f-77f3bb3380e3.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 0xff3733eb565855c59183a3b72bd625049305e98970f334a75c247100c4716787. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:57:18Z), 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/FR96X2190830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd692fd399cbaee38d80a655b2a2fbe48eb5b9a53ef0c0c29a39f8f8256fe672d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:36:00Z), 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/DEZC62469071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ddfd78681c89ad527a6bf208c2691a9077ca9f97600c2553f6107d1883045c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEZC62577553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d0f0dc790f734f66891bc9dc3951d13217278b6a5ee2d3579450a62bb297d7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USANG2504263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5a6652e6c68cc8c245b87b9bc02dd1ee85dfe1471c8db8f143a2a3cfbfa12d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2504261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b194cbc88635f3c4e9d240e1381879f614f321ecdbec3123775b540224e1582. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USANG2504262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f4b781083b58f5651bf92534c6d0d094888e05ec12e3d4d0708729e07ae6d7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USANG2528536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ce6112f4c46d7dc5831b1b828b6cf5f5f31a8abb1888d7a6b6150fd4bf462. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRR642301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2687badebea4344155765dc49e5e661e797723254fe304c0ea3a5b83e0a960f2. 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/FRR642301364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868aee16ad09f9ccc8fb45636a47f25bb7e48523444d21901f0b7e1b51adf486. 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/FRR642301651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcdd38a211fecc39d1a4f41137efbcdbabafc44c68bd8e3c5ed3598b4a8e876. 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/FRR642301652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e559dd0913973d427fd6f9b6e298717aa32d1f3655ab1f39433f18f4bae6780. 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/FRR642301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ce6112f4c46d7dc5831b1b828b6cf5f5f31a8abb1888d7a6b6150fd4bf462. 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/FRR642301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb529118c77622d016fa55520c828e4707554d42beef0a4e3e32b523d044594ff. 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/FRR642301061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2687badebea4344155765dc49e5e661e797723254fe304c0ea3a5b83e0a960f2. 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/FRR642301364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa975e254258c661c4bbf2598d244bb77fbb7d3f5063c53d289890644561bb272. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22267183.