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 0xf83002b30b9dd4622e4318237f705164633c925e891cb702064a23567384d585. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/390caeee-5f99-4236-aac3-ab7a5644d9cf.json and https://artists.proofprofile.net/proofs/artist/390caeee-5f99-4236-aac3-ab7a5644d9cf.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 0x245ea6b584214a4503af673c03c024f313d3343849cc95377932405b3cabd9f5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282293574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30668be8e754cd203f420620fc809a838d175002c22650918cb130922f642051. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR2X42341626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778a67f1d098f1c94c82856204c0b66b8f4716ad037a80326e698cd1505016be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IDA632205553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5fcb8544157163b1c7f03fa782a3bcabdcd612d83a28652edea848067a6757. 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/FR2X42323511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae261cd7807225e5ba971087de495907c48a0f84701c336e8ace803b3a0e6c93. 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/IDA632308500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0217dbfdcb6719af2a7f82b387973bc3158097bdca1c2f87108aa4998cacc6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:34Z), 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/IDA632308861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2bb4f2a90a1bcb363e7bd59d29cfd9c2177deaf14fcf3dade9cf71259c299e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:58:15Z), 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/IDA632312705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aabdf081cf07c3d6305182bc96500c4b40b4e560b3bafafbe7f4fa722a985b4. 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/IDA632313578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4291e403e0690c7e32372280766659c0c553d04dac5bc9dd1b58daa89dc18d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA632313632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c316ddedac61b0626eb43fc66fa951f54618ca73a9580faf7227070f2dbeb2. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:08Z), 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/IDA632414268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691eb46b25078bc63222db6be0399f712789a71d56c85cfe0fee1da21466ebe8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IDA632414724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f4f852571151463d6bc38d2fb53bc0784fde657134350a74c271bb47533240. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/IDA632417102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2fb1a04f9f289ca70c4d5b79179c81f46f273be7de6df3dad6c9a612c8f501. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDA632417800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a8368e0ee6625b07465a40c56f360d60af5a1e5fd333439bfbc17a7e2331f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDA632419677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddc2336340155c1048b750f720f46af06edf614761e73d7b1acc82a91083116. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IDA632421506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b96ab486f2579f881f74dcd8793f44c470dc2aa0f7e05607c10dcf29c91703. 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/IDA632522978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259778c9c4d7f9f28d7d6709f91a65f585fca8fbc069b07dc09c311a3a32943e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:29Z), 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/IDA632522981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5892ff19d060b52c6c4e4526f59af78079d36ce45be41d976fdb4b0d62fd9b38. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/IDA632522980.