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 0x54e96ec7db397d76e6e02814ffbf551a8fcf7a809181df4b7174067a9843c38c. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08be126e-1055-4207-867b-2188aa0324b5.json and https://artists.proofprofile.net/proofs/artist/08be126e-1055-4207-867b-2188aa0324b5.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 0x82b0f0516e15dabdb2e8696b05299865586926ef9fa64e731a00e471e9dccc51. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:35:57Z), 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/QZHN71978300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9b59826a557fc1027997589c56f3270e2ed278584a9b9c880626c06faf63b7. 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/QM6YT2204502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8ebde23e40e0a9570c6763a7a37a7c55d021c6c0472913faf3a69bb7e157b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:24Z), 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/QM6YT2204506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0088e6f6d0f396b84645e61ec74990a0e6e1981f99742f5678e894d74af0457. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6YT2204507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865b0b843cbc05245b17ffdc2beccab1609e2b298b40f9d6c3e49f27dff54e39. 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/QM6YT2204508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2107490d8d2c2237f34a3fdb7b0fc9222baeba135d5a74a732d0343e4011a92e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM6YT2406102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcdb73fb6f85ddba1b3848ea417f69ddda751c3074ccef26f2d0e4b309f1517. 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/QM6YT2406101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0492f2a32b83d5761bae091f5f82c1e6e2fbb2c4476b533c0f789af4019d5d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6YT2406103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221824b1f418475c61891726d3b9965f014ce850645ac911c8e4999cc86a39c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72384113.