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 0x765799bd441b3efba8ae372e57569d360dda95de749cdd69112c9bfc15b1cb81. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b1a5012-a418-49d2-8dd8-a86b11d9e264.json and https://artists.proofprofile.net/proofs/artist/6b1a5012-a418-49d2-8dd8-a86b11d9e264.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 0x121013bd3d43f19a30efb5668917813c3f645bf2df742882c3d36c32f02f2f95. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB92376345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77853973c73476e38559b4723533691865b0108c5d7c77414b356e02ea5fef5b. 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/QZTB92487257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3378061fcf24b716f6c85a69e6ea96a154a3af6316786d5e62039bd79bc105dd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFE2478181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b346cb7b3d41e166c12ee32515c76c8be0db6911d9eaba454f554ee0b5b663. 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/QZZ7Q2470009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb00ca812b3abc6df3ecc4b5c05add4376e8278e12ccc33cd57a911b520bb921. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:06Z), 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/QZZ7Q2469989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda3b93f1adb830a6c45b6350a89980f2a17e2ab6bd6ebda430dca39d6e6d734. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F32433511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034937aa224849a5d88d95a9e8ff8459b8bebaa16fb1cf6b3b2b69ef1561a30. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QT3F32434940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8c1f58aa70c67b465b042806999d963b812da37aa5dcab30f06bb1a8d2c3f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:43Z), 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/QZHNA2545465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f3a7b053efb02c812f76f7dd8013c03fc1b02d496e0e04ef090b82b82000e. 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/QZPLR2529456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a437c7479154ff30648bf7d0adbb4a8e1e4c3216e0db7103484f6649d81ca1. 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/QZTAY2570596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee3084b896a7ba417033680daabb50d13863e25012153b84979ceeebfa198aa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB52526009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3389233307196609e2938a9df849616e383868e48b3c672f26fc4c6002351a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:48:55Z), 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/QZWFF2529163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c0e228be2df1e40764f054b8bc47cf8709a899f7a456b04d9a77113dd37cd. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZZ7N2579095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9aea04c2f8a4daa78d603f288f64d6e5bd29297a1925a091e434de82d84146. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:40:32Z), 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/QT6EB2566826.