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 0xdcdb3dcad47988747b33abe5b181c4b3f1bc1aabdfdf77d3b5e0cdbc3cce9da3. 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/6c1b966b-9f0e-4c53-838c-7f247dcdb94d.json and https://artists.proofprofile.net/proofs/artist/6c1b966b-9f0e-4c53-838c-7f247dcdb94d.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 0xfde44fdc34bf1e1998b50f70339f7eaa81b0bbd4a5dc88141041c05e8ed7b9ef. 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/FRP622300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a7ff764f8e239f810f90b46eae5fdef6fdcb91f10612964e9ead66ba3b2ff. 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/FRP622400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be7680cbd06ed108e3d837129c92b426c745a3569d8261ebf2973d1a3e11d4d. 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/FRP622400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dba6823e22c41dae519edf9ca101d40835ca52e38e317e30e0188ccc9471f1. 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/FRP622400660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172858f91fbbc25c91d35a7b1fc1f219d0fd2e29d9c515f808882c45f1b8de0e. 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/FRP622400670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f00e8bf318460ea1477ccd22f6e07d4488f10ea3bd52153aa806c756da9f24. 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/FRP622400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03d181c1197f0aa54dabeb110137971e4e67847fd75dab5d5b1c75eea0c7b5. 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/FRP622400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c629e2dbcd4baa444a1367d9f532ae9de98e341c6857dec9825d919031fea. 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/FRP622400530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ee8e0ef546840974fd24644a7034fd899d2b3598fe44917b114b85df1659c8. 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/FRP622400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae62522b7d30efc3c1830ab9d4a807017634f460522d4e8ff4d704215513712. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FRP622400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26ae56f3a3dd9140c10c2a3eafed403a6726834b38d309530db79fc3f62771. 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/FRP622400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22afba2b4eaf1a9acea248abc90bab1a7373c5d65ec1ff2575d6017569e68c6. 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/FRP622400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936fa8f46924fe091635980fcea999b10734a7ab9bba426290b033a7d21bee52. 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/FRP622300000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d00ced77fd8e3bf66ae3a853b1f06e380dcbd3c76b2f388c5ad0cc4c535c90. 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/FRP622300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde44fdc34bf1e1998b50f70339f7eaa81b0bbd4a5dc88141041c05e8ed7b9ef. 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/FRP622300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcedd0a05c1616054df27baed5b7b34f7c81fe8af115900c2fd618725557d8a. 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/FRP622300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaed2e2d43df561be3257190b4034a475f9fdddf46911d295ba5056d129c652a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRP622300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014564172dfe0884bf95b508bd493bfee1cdb753f98262c9fca7236bb272ecaf. 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/FRP622300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013c4beb0da3d6cb1fa9cb42473aebf125b3c104626d3f7056671077f5b93eac. 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/FRP622300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b252b56facabe2b056eccf5813914e1562e89de7f1b071fdb4b0e8828cea7bf. 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/FRP622300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc55de6c70dc9f7ad5b0c14cd82bb9f2bb80922992d334f4bfd5ff6d9a23908. 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/FRP622101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932aacbc89ff319a58c1122da7d51d7c0ee4fcc3dec2068a5305c728eaf9dc4b. 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/FRP622101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4eeb12d31719044aa8d7f241945b6bfb21d705c474a7a9f126a67638b66a05. 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/FRP622101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed7a59567899a9c40bddff79bb9c6aafa5609b835b36f9a24f4d34b8f53ba38. 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/FRP622101140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1adfc7f1dc8a0c9c08c981e6e08c02c855ab8043416b95eb2496322c0c5aa50. 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/FRP622101150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a8a3b15e053c8ca896973f37db3b2576e4220820d9c385cc0f57fd39667dd. 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/FRP622101160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0ca09e07ab3705590e3ada1c688c602cef5fc7ab7a95845367b1edda6ef239. 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/FRP622101170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada70a446e4ca915115a1c3d8ebe58f5ea79a2549fef09fd6bd62ad70abc598. 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/NLS6R1876952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2e142174122283240ef924bac55934271a5cd9c7d4706acca31ba46d695272. 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/NLS6R1876953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c4d8bccdcb21f7c2b3714fd605b23acff32ad44cb82539be5695b7bf67406b. 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/NLS6R1876954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8f6ce8dc818440077ef9f78eef72548870c7bc9fc877949aaa44db2c061283. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLS6R1876955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211be36d07e5e3c0898ddba243f28275329c51b838be132a3fd9724a6c46e86e. 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/NLS6R1876956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c8ae9bd5c7f7b2a5b7a3e08dd30b92787b1ac552177abe922609243920b45. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLS6R1876957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418dfc7d5ad9ab70ccabd501de5307fd1dc8111314e2f251c72f0611a95d248a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLS6R1876958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26ae56f3a3dd9140c10c2a3eafed403a6726834b38d309530db79fc3f62771. 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/FRP622400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c629e2dbcd4baa444a1367d9f532ae9de98e341c6857dec9825d919031fea. 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/FRP622400530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17df9536674331c69903d61966b830a600b2f0d9c70632b50abcef9340a3d71. 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/FXR142300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcedd0a05c1616054df27baed5b7b34f7c81fe8af115900c2fd618725557d8a. 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/FRP622300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2539c34bc7e45a78ea901a8e84d5f91414d39217c792d16bbd8540fafe00ea53. 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/QMDA72230384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d00ced77fd8e3bf66ae3a853b1f06e380dcbd3c76b2f388c5ad0cc4c535c90. 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/FRP622300010.