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 0xe9fd112425e3d7275cda029491cfb0954a7b69a42ffcf90177716f21d30987ab. 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/5611029b-bce7-437f-bbe0-ac5a0661d77d.json and https://artists.proofprofile.net/proofs/artist/5611029b-bce7-437f-bbe0-ac5a0661d77d.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 0xf7083834570072ca5510bb7409863a0cb0364beaa505a503e6de94e0aa575194. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN42261477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3eb81aacfab47856cad6a6517fa21c55be4a779d86fb88f5b779271556c480. 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/QZHN42261486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71998f9be70d9c8d5178e0ab231a87c47c518baa39656a8eda022bbf4eaaa7e. 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/QZDA52287793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4386a2cbb00420306bf947e88af0b4b843b43f95257770900ddbd87682e9ac08. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP42224342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31f8c1b875c8a1bba75302a0404605d5db3371abe2e228dfe4f7ee973c5102. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNWW2194248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca41378cbf95b4a3ba7c88dc39152dcc3a9767171c114443f2791dd4e07c9650. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:39:11Z), 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/QZTAZ2299238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1eb0910a0a90a15e2808b0260f599b3edbcfa3491b50446f69ac195fa0eb8. 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/QZTAZ2299242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b4e5a27bff1766edf981a91cdfdb23e38d5cd21157d0903a2faa4d6c6db8e. 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/QZFZ62331885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cca9969451f379988efaabe8ada81e36a07ecbe0ee9a6f416f8577e21a4a7b5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ62324456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb772b0fec853e0dd807f8916244c7119a1801bdcc204a80f34b9000f130863b5. 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/QZHN72315111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7689e5a95a98a461e9778199d9c21410939642b124b8856177743e223b69a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:26:12Z), 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/QZWFK2304949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed125e6edc70bae3c666adac47dfd74aa7f3cc815beeb58c1f9b9c434cfabb. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZDA72445861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2edad9d30c20866a79267edc2ac5860f352add5d87c9ebb44fb0cb28404765. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES62477376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cc6e715f40d2d44ec9030f9654df25e66af27863aefc4336f830eb0a5f5f81. 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/QZMEP2483669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09ab7e82ad86eac23dbbae03198a103b657dd833f4b6a9b13809f93598a173. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWR2433172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ed7d37d11f37027ddef54a1bb5e03a7eecdde675ac7d0527ad745b274a3ff1. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTAW2495289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc496fc6c89243c26e6ee13aa520a1c203813716a0f2aa278671cfea593cfa. 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/QZTB52473937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe294b98048cbc28dd7bbf36f6386d4a345f3b954f04060890d00a5fcf9d4a7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5BU2575277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20181c1334d655255e5e3af06ebe773b477f57b0f1a1dea4e49dbf95bc8db5. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAT2355094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190bb62fd01743c74b0b1053e09f5ff4c3a4d8f2b80ecb45eaef2514389dd111. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTBB2310035.