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 0x527cbbc446b7fe954ccfa9aedf34fc067ce9af15b374c843e7f229a72f463107. 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/7eed66b9-da6b-4d10-a0c2-8e3b30591b99.json and https://artists.proofprofile.net/proofs/artist/7eed66b9-da6b-4d10-a0c2-8e3b30591b99.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 0x87ba97fbce601e55807fcfb3920e34b9c8b53f14d79267af0c7994aa62e4f2d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TNA0E2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782ab145e9b649793a425c8505d3feeed812ffd0569371656ade2c05ef99280d. 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/TNA0E2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c133ce0f69ce4e57df0d7f80d59693fa43f2872b2369375a7b984054e27007f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TNA0E2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0237e238cb5d04e04872a7590a4b40bbe75fe1221852c806e2b3d677499dd0f. 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/TNA0E2100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb664fa5e16b6e3fdf409fc8a9c1ee05b6096f2aebc7b4c748fe5780a8a279a49. 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/TNA0E2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afe19987164b9f9cb912c654967438352bc88308ff3f3eacc29c5f9da6b1dad. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TNA0E2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306b02ca0bcb6ca77ae7d63bd2c223ee649ae778d6574f1ebb39675887113d04. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TNA0E2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d63c7935b395e29b47c2b33ef15769403367e6035a598f6da7ce89f9b1157b0. 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/TNA0E2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d35f93dcf8fc096d108dfd974850c2a771d92cbbee9c0e8480a3249b8c763d1. 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/TNA0E2400203.