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 0xb2e7acb8148847224a7e3dd8a7c7f2a814251d6a8451971eb67c2f4c1a484340. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cb520ac-d280-4127-ab4c-67cf008c9fcf.json and https://artists.proofprofile.net/proofs/artist/2cb520ac-d280-4127-ab4c-67cf008c9fcf.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 0xde66dde0b41ab365f2a874ea0897e566f570b5ace611e65e8ed9f951b46b4a1f. 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/USY252500295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8a1212f5db4a887a86de100e010fc7cd440bd63c18207bee9d5c574eb46ce. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:14Z), 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/USY252500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde66dde0b41ab365f2a874ea0897e566f570b5ace611e65e8ed9f951b46b4a1f. 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/USY252500295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8a1212f5db4a887a86de100e010fc7cd440bd63c18207bee9d5c574eb46ce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USY252500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688ecf2ca6fbd0ce8ccb1a6c13bf85bb823ce0de7c31ee0d3d4474d41e2c5667. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USY252500297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1355f75f6adaec1ccf9c027868d278abf92e4e715ea3855d28fa16dd065fe4fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USY252500298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06867b1ef8581407a64d09a3b3ed2c766f94a46e7aa31505f76e747ac083643. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:47Z), 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/USY252500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf351dc4726b107bc24b95c5a69edd347a6337c80b6e6f0a55ffb6ac8f43449f. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/USY252500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029704b9570580629b8ddadd9ceeb7b674d8ad19ed5963a4b373596650212e36. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USY252500301.