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 0x1fedb7c91f0d94f1cb7fc98a3f04be739c6beb9c905e7b85f49e073b52cee0a6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3bc2ad1-217f-440c-b73a-e8412fd960bc.json and https://artists.proofprofile.net/proofs/artist/b3bc2ad1-217f-440c-b73a-e8412fd960bc.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 0xc1b43d4cff6d086be8b5d2f6d39770620f106832d91d0c97dbcf255263df424d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAT2468095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5825642c39ae6c83f1733b4dcf5f189011ba95e4ebf5a0b07d8bf784ff415c5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2481834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa516254ea9090160935e3368f1d7d39dc8da44265e3d51459fd896f9c1570d62. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:14Z), 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/QZZ762484313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba4560b630358a4ae3922be8a59452875ce29c491b9223d4bbf7b931f58ab3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7P2499781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954c58baee91de2889e06a50e975a4e2ba986c68a085a6ff106037e98786ee3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:05Z), 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/QT3EZ2478265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0cbf455bf215abb223e9cbcb780754f1144994b39f87deb681c810687155dd. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT3EZ2478267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81849d957ea2db4771402694a88a77e3ff4d76df771bbbe3b2c5993c50841006. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:10Z), 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/QT3EZ2478268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dbd6711dc706082ec48c2ea5cbb35031700ae31aea8e60f849d0f256795687. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZFZ22531508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d25545d83976d1401c3f1d0a2d330d5c276f88617a51594ffce84e27f99b4e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA42533301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cceab098e4c8f741b226c658d987543b4640c9d627ae7a3ab8cdadaa89d06b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:38Z), 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/QZHN52515979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e9a2037d49b3e5600e6c2a32f2e47b995135daa819c07b79cbb360d043b37b. 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/QZHNB2507740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f8114f237088d35db932b03da0100d0433618df83468f46448a50073fdb0a1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHNB2507741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df5e2f28a1eae466ff6a4ea3c1495c78ca2bb3ba087c29678801166ce01bf1e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:09Z), 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/QZHNB2507742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4276d98cd4a1ca2f636f9babce326202119449aff9fc86d20c62616d775c7866. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6H2516121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b4353ae5dd06e53f1e8f40efd4fbd034ea69e6649fd1ef7ed50b7df023d40. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2593636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67ab88d0a4aed63b93fbd6673bc687814441cdf53548a5c0a5d21fb7b85818. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWZ2577305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c481c8d8488977a3efdf45747de23e266b4e9ebd1a0f27ab6c7ee4e99ca4dcc. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWZ2577306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba273ef1db56c50997d7a4b67336329657dc5530ea61a9a3c26c374784c91b7c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB62554322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ca10ff01e7bcdaaab270a408fff0549e64997c104e7cfdb0cea42c5524c471. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB62554323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2873ca3155884cdd3311ed07432403f279824c75609dc935ba8d051417a9706d. 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/QZTB62554324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72631c3bcea0ac891ec0d283d3681c45d18cdfe330fbda490e85477dcef380d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFG2584432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d630bd2bec4eac2b02f4be11053fd9308c0fb623650c3d50fafc20679a3dc3d. 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/QZWFU2572833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a95476a2ddf42b4a3c961c52aae2744293faf2d78f19bca03f7d37c5ab74e1f. 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/QZZ7P2585982.