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 0x7c0a3e4be0ee968384a33e1aa1dff899e5f295fb151d0b89da1e2c3f8b241d9a. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb210310-a745-4ce1-a35a-c5853572a052.json and https://artists.proofprofile.net/proofs/artist/fb210310-a745-4ce1-a35a-c5853572a052.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 0x69eca710bef9a6b089db615b54e1cef169031eec28b58ce89a55716007999280. 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/QZHZ31952906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a660297d1ace55b0771c394f3c333148985e15d0b1ad0a219eb1d39d053c83. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHZ31952907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bfeecb475856af74e337830a0b785de50dd3eed3d7289d2c180508c642e041. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZHZ31952909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4af82fa8bbd2cb677d9a95ecbbf1daeb9f0c5b6dc6913425a6f1fcb9c03be9a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHZ31952910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504d6a5cf97c464dce544fde72021f007758152aa10176bf8e6a2ecab7da6d45. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ31952913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302660cea13481fc9c14572e03b3f4e711a2f274190e7a08638954d3837808d2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:42Z), 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/QZHZ31952914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008544b14090ed6a7fd9f968d2de390222aeca3531cf92e220f7be316e1e5f2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ31952175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80b1dc5612390e12f6b3466d3eebdfe7d0b436d5023b27c981628100acf5ca. 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/QZHZ31952179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5b7c2bbf4a8f8ca911c2eef26625933b95586d541888b02e19dc1325fcfc3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ31952181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795fa22ebed457a51931950d3be1c7bb2787ca9223344bc952220facf4694cfc. 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/QZHZ31952088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f52eaa3c88653c68167520a5c3519b7f6b66dd6746839d4c9074ec01428b0d5. 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/QZHZ42057554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8088ffa4c97811508506bc0d196ab094ef11dfdc730affde26777dad2f4deed. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:02:37Z), 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/QZGLM2194543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ae239e224b887c75bee56d9734ef18412e1c9a350bb6654f82277e3addcc67. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2194544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f76423342fee52f5bf48d28829cfdb8e08b744bc3662a26cc138fe22db3004. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:31Z), 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/QZGLM2194545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7ce184972b4659c516bc6ab80c32a8a284fa5ed34105c1d4352eac2003d95f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZGLM2194551.