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 0xfd84b8f8350e13298f9b6d6c7474f71a7e8ad084b60b541a0251c0e3663a13a4. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f83a5728-6245-49e4-857b-a376c68738ad.json and https://artists.proofprofile.net/proofs/artist/f83a5728-6245-49e4-857b-a376c68738ad.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 0x7118a0ac2f4a2082f31767d11df2a01f97b74b71c3eb7860482f1086d3f1b3e6. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GXD7V2589463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c03034d93c2fc84787d68bb9d3e80f583599d3a265273d5fa234caba92c48da. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:04Z), 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/GXD7V2518186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f035b935868eaab5f759e27612405ead1fb9645c683394af4d683826e4ad3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:47:52Z), 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/GXD7V2531782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16a4fa221e67014cc175904f7bd506793a18352217ee44643cc037a8ae8e6c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:16:35Z), 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/GXD7V2503008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed13471f5c55a08906af790f594a30f725a9b88461621b5995371cf1555b4383. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:26:18Z), 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/GXD7V2524265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954a8fa4750a7a92df80aee2a7835d6651f089bbc76f388d6f55203a43ae569a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:36Z), 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/GXD7V2573949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a6843f06b346cc2405a96d7563b7dfd283f5462b4e98e034e799eb02ac2d6e. 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/GXD7V2594617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0a460958564ba969b82412c287692a0a09f2e7ca0404e14249464634381bd6. 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/GXD7V2576401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81cadac5eac3b613af91789201e820799a9143e5ba123906ed03252f600c690. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXD7V2548477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd622672be5090c7e1e23efe0f6e7e485b02bf865874fb5f29281938a3325bdb9. 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/GXD7V2556240.