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 0x965bb4d19251a728392d00782002998a1d6afb01cd1e3973a9e46f617ee04d38. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c45ccec8-f153-46d3-a682-56f29a83ed1b.json and https://artists.proofprofile.net/proofs/artist/c45ccec8-f153-46d3-a682-56f29a83ed1b.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 0xe575c8cdfc384d812aceaf0820079d3d9e667e97ef236ea27de2c2a7a8a6f277. 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/USDY41932284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc579a521fb64428b47714b4355fafbd23b91f2f43fdcbfa26a29bad7fe39d7ac. 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/USHM81934621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2f1d418629890c4b01c945a1d9fd3beef1b89f693306db02f131e28a526b7c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:01:41Z), 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/USHM91942672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6eaf3cffad3174d74d4178e19ed9b507cbc32de53130b77c1657cfc7eae1ce. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USL4R1918113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e05d4c6a0e0f737555066c95a0911acf23af4ea15695f3f015a6a7faa9361. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/ZAUM72101930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1313d979634114e5aadef739eb5d9f68d81a6d7aa975d9a98604c47478bfc77. 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/ZAUM72201353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9232a9de42ae6c18dd5eb6ed68899487e042e295bb968e32affb05b2fa2e404d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAUM72201818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d258d4810f56f0e6aca438fdb217d1f61dfc294d66c839e6c2149349f6456b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZAUM72201819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e05d4c6a0e0f737555066c95a0911acf23af4ea15695f3f015a6a7faa9361. 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/ZAUM72101930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2f1d418629890c4b01c945a1d9fd3beef1b89f693306db02f131e28a526b7c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM91942672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382e218a3f2532fe64251683b65aef80165e29c3c2cae52ffffd6ff8c16e76f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZAUM72300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2817c327e385376a1d0064b7dfb5cb398d30f9a5c021bffefbd28b2a8f57e. 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/ZAUM72400688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2817c327e385376a1d0064b7dfb5cb398d30f9a5c021bffefbd28b2a8f57e. 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/ZAUM72400688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8ac7f2c9a796d570a035b926ce3dbcf62c48b67f6bb0ee2953c31c315d6b16. 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/ZAUM72400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382e218a3f2532fe64251683b65aef80165e29c3c2cae52ffffd6ff8c16e76f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:32:55Z), 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/ZAUM72300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2456cf13920504cf621a5471db3b344a84b6663067630750bf643c2b335f5d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAUM72502680.