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 0x7af2f0e14e21f73f2a6ffd7d0243738443bbe5a02ffac639f07bdb508fa5fa72. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ad1338a-05f9-4642-8188-3dc1ea8b6116.json and https://artists.proofprofile.net/proofs/artist/7ad1338a-05f9-4642-8188-3dc1ea8b6116.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 0x5f7ebe323888381f43b3bfe6941b5e4704cd35547f2ace02950ce28ddce8ad21. 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/IDA172121314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee808139146962970796efd3b8a08b405ffa20f1597c71677029e30772b9ac. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:12Z), 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/IDA172121270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5bfcd340cefa53cccb31cbec25f25c4a2ca6b7097fb7fc1a2793e1a50f3979. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA172121271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b677a2814222bdbf70b730a6fab841d5781de32ffed85fce781e1e532b30f7d. 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/IDA172121317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0fda063dd876004097ab15f344110a15a417be3c95ded63d9ce466c8f73c00. 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/IDA172121159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ee18cdca22d7a87e3d465c3ab8e0b47316f6198473a1f9ceeefd7f6d8cd69. 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/IDA172121153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc968dc2784bc2f3258e97e6351b32e7baec80c482ecc59c5ad2243e02da9a346. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/IDA172121155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ca10a15d290c45f81a77d9442a49cda0150e670a07284a8f423128809bd552. 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/IDA172121149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54b333f2ed5ffa3d22bb0eb549866e1382a22720e464432844ed02c144a50c4. 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/IDA172121158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b053a5a09e8e1e87300e05df7e08c44ca51111bfe461224ffa61a2a07e631d0. 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/IDA172121156.