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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b9d86b67bc28257de388779132cbb2e17860f70dc16bcb5a290752fd8123c2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6066fb29-3125-4104-b6f2-0e2f3f709895.json and https://artists.proofprofile.net/proofs/artist/6066fb29-3125-4104-b6f2-0e2f3f709895.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bcd1c856672612bfdc0da5501258967cd4d83236f2193b36783c011d5a4948. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB52259017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa010d5248f18a1224e2c88fa622fb00a179c08ef5ae81ab2bc7e318d44bab97. 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/QZTB52259018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e1efa5c5512f8d37570629fb5c6beedc3ad7b1f1808c3c8ce23daff25d750. 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/QZTB52259019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952a3c1e1ad9f3dd64017a27a07fca20a0f94e9554c45688c9a560de3e845264. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB52259020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21877aa599200b38f487c7dd0b6b4693e1c58501f307d2dcba12c60849d1b16. 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/QZTB52259021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f1298eac660278d6a7853ff548f830af43f4b9ccede14ed9d496437447b60. 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/QZTB52259022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142c4c4622c6d13d55665b2e6a5424f15a845e1cc7213c9511cf2796d73af521. 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/QZTB52259023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc401676f981326b8aa639169e2a04e1c527ee50941e5d6380f514136e477bed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB52259024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff96f443355b5ba37df226b09cd008ad2a23ad11ddc387f0fb4b2534f58aa4d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB52259025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c58023f2342081cf43b4528d4646ce55165b72068f964a9fe185d8f00897c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB52259026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edcaba82dc645f24f7cc4f4d76a860e4549a463f514c646c9a71dd8905025d8. 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/QZTB52259027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acfb2c3109ddf7026fa46de479a2e6247be7819b3ab6691f68b8c9034cde2db. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNWV2107618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0743eb205297508978da66d8199366f32fea239c3ac53528879e0abb45fa4c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNWV2107619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33839c1e391c4af0255b2e46c419df9cf854edba6d690d6d75c03933a882648b. 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/QZNWV2107620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3ee97ed24556fddd28b6eb519ebfa07ac4b42ddbc2dba53e5e393557e0fb4d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2107621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790069c5f5c5899325fe841fc8cfd406653650cb8b13c8e350ea6e93f5a255a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2107622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ef10e7c5adb827f59b76305377d30c5645ed6afacc6bbaa7f6854cd742c0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2107623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53752ffaf032e57265182a9c49b430088755c3d8730e9e0759360946a6b75ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2107624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f0edfb39090fde011524bb03cf6d3425b1f630f2dd0c7f8e09f8ca94ac16e4. 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/QZNWV2107625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448962083caf22426d1f89733cc3ae348443afd208850d9676e306ca6466d46. 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/QZNWV2107626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbada64ea16deffd81518461d996cdfb21b06f7e850447d25814e8ec7debe03e7. 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/QZNWV2107627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e078cc45635e0c40125c78797e2a49a767c63bca536c7567fbf456857be31cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2107628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7866373990f916444c9cb603c58da54e9ef6fc319b010bc3d6833cc0acaa68. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZNWV2107629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a8b399c51fb7353791f8d687202291a0edcb0db850430507438f0a5fa6308. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZNWV2107630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ad27a5f49c308aa877e878ee367e912b312e9baf50d991e87d92571b818939. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWV2107631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d19eddd64d478f18e9199526957620538c6bd69693d179237d332869a1bb12. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWV2107632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49858bcd8cee918e76281e6938791e5173abe7b260d8cbc5ffef4157e9560381. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2107633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22bd8b3fa53fb49a25765fc71bb3dfa2c6a632049f504f452dbde111ab2894b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWV2107634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dde492f4d224b2f7448eea91e912ed5dc9ef44f22a9f4bd9ed8c6fc7ac47dc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWV2107635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e09cffe77eaac53a819d9cb19e6473c6c62682982de819fc9820776d20dca9. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QZNWV2107636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f6a1ca99ed85f8fb2628303b1dbc0831d37ea34fcf6290314521caf04ba1a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZNWV2107637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63417353083b1224bd7270cb0fd819f92d14839e74ce3ae467cdc194a2deb9e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2107638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3b61ad406d0fe48d61128881fa7ae56e6f56f0a4c0c136fa543ff79676e4b6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2107639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ee7f00b230bb1d45296d1e0949c3c3a748ea10bf73dd668645712a33de2b38. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWV2107640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7023ea744c4cd2cb40777fbf614794ad90eb238294c952eab18a42c427037cd8. 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/QZHN32283716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101eb844f5717b6d0f1f788d3f16b4af9e82ec0174787163c0a805db09aa81fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES92218091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485f1d9fd5c1a1a42f88ebaa3717980ff35ffc3a1d7b722a4af58a29326306c9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEN2270578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9294b30687193fe8bd7fc5fb383d13d0d245627a9c0b17ae223604f250b091b9. 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/QZFZ72397258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce955f62bc686b26f1335a7059b47960e41b1255452af64dfefcef28e1bc91c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNMY2200648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb066a146c044b09bbdc2309ab49b60236432244a518e5af8d07eb325e0f338bf. 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/QZNWY2244988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f617cfde692bcdee0e936562362d44c074c57460bafdef4048790ba1ca3db7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWZ2244997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f8be3bb886e560ed1f0a839742d095854260e8374af2d5db9b470c700b106e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZFZ72398747.