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 0x97c7cca18de807992663a4db8a89667fa3ecf6c0d3d80946812759a2277d8d34. 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/394f9eb8-b9ac-4770-bd59-73aebe51b1ab.json and https://artists.proofprofile.net/proofs/artist/394f9eb8-b9ac-4770-bd59-73aebe51b1ab.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 0x5c1e9382c89c582b37e65c328e1680da689fef15b32951260a2c074f633a4f99. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMF922250049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53366f4917b5f0427b05e3158f5559f4065e9cadaa9cbb6a6fd211ca416f7bae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMF922250050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa213186575f1ecf210db4ab35e2af58ce67c69267f660322e77820dae23bb9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMF922250051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965b55a9e8b08a0ee731ced9f13fbab337d507fa921769b0b5e71316b2990512. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMF922250052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d0621c94e338661a37ccf87ff3d9d443d79250562c39291eb573e12945ca87. 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/QMF922250053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b77bde84657f2d31d2b29fbcd6156300a76ab681e6f7bf19ee600bcddf2b6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMF922250054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1ee419d4a9aeff39e5eee2275a77d55a809b987952401fbebfa90bf0dc23f2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMF922150054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24797d0e96bff93e55f3f7c69daa1bf682ae4611edb982e649d46289996e91f0. 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/QMF922150055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa28dde1981ef8bad2d659fc1085f30019ca44f4006d842bd6b5562df261f091. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMF922150056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1beb2937450da33ffe9cbdc4f519b83a9fde9377b9811152c1f046ea8606ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMF922150057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e79147a6705a62bb2423493e508cd957cc3c7f785bf289787d6a89167a52986. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMF922150058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78dfba702d9793369c84340cb16ba1d51f454a796726ade29f2c077de4fd6ec. 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/QMF922150059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0cbbcca03c313ba8fb36c5f1a8d3e8d3c2944d77b6efd4291245bbb2a78600. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMF922450139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7e20bb4df1e195c68548ea33dd46daa9d9cf434ce7af437988e3f3b95074dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMF922350052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8eb7e9f66e621aca03114d7145e0b797ebdc69161afbf744bc2c2740aa6dbb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEH1978732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd4ae82cdf820d8184a8a3d0871d966cba9335cba48373c073754ded2db3861. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADS1857364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4fd6e436c185751aeb6dbbd3555021afcfe85d818f7b9b56826a5cd450465a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADD1709809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c7e91c3696ae9eba4fd9094de3606c4e9ae4ebb509509cacb66101a12ee2d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADD1709810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcbbc31682e9d0db2beb12348f9ace051eaaad8324c114542b7ac4cd4a20e2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADD1709811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd7eb7195559271631ed70fcb823e8ae9835f4e52004c5ac6763e2c296a954c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADD1709813.