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 0xf930c76a03462af644dc54dca5dfb0257f87e62a4f7ad2ce3a26e976364b55e3. 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/11415a4b-80cf-4554-aebf-56ed0a30093e.json and https://artists.proofprofile.net/proofs/artist/11415a4b-80cf-4554-aebf-56ed0a30093e.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 0xc68ba85c65fe7bc06cd2c0dd2f0554e5397d346c84456bcefb71aae0e2b8de41. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2160677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff2e0b31aa0b641bcccb5e1a9591ee656e2b887962664794e54e9f29637384. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SE6I32149653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed031fef7abc0ce8e07fad5fda8d953362ba2f70dd63b0a365df947338dac2. 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/SE6QE2169357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad20130f43fa885f409675a1bc93722396e095d61c34269fa012b97cb64d6809. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/SE62M2191218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebdb325c563b92ca3ce661705939da69562cd98aa18d6755ea389eb687f81b6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6HN2271027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371a450bcee2d83488b65d05a04cd142f5273d342de6a71eb6f8defa8e3b6594. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX282279591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd464b64551ab73aae4929e9530add06c18cb2452c2b6e04766c674ce5ae075. 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/DGA062291668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d842370b59586b6f8b4aaf7475d05674676f59ec2029addb901481a32cbafe. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR10S2378725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004aafdfd8952d8d4c4babdc86e9fdef2bf76dbb4d4513886d82ceca9b3ace85. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FR96X2314556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cb2d86afecb41a0275d1cd5f1af281fd47c57d449f589c99fe4d06fec2156b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX202318700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d8440f3666ee5ebe741aa0998bbcb4b5136adbc587324e0bd0def05577fadc. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FRX282398998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7124a08ad3a0cb34587b300fa17ad89b33ede6658588e88e89d831fb0bd65176. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX872361876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf092594ec6f1e5e865ec8dee17cce3d5588fa6b3a0f6eb70567f1813ff46e362. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA062333665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a16adbc9180c3a7e28bdd0c907a84402b01559554f3d82373642804857bbb6. 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/DGA0Q2306215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6a71067e54b3e1273f069e68fed30d90908cbcf9930f185cb82ac3e9e8f411. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA072454466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb1a64dd01db39999a32154aa92352ae8a0d787fee948f14a18f1512beece0c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0H2482412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd79478227bb802fd7db99ac068cc6a354b766fc2958baebce73f9d572c0fe04. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0Q2422185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc337d35855a8ca40fb202dbb5ce3ad13b243f73c1e70b7adfd2b71db8da77843. 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/DGA0Q2422186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa5218f39d3bb92daa0189ff9b35429c898a015016126e757b870799fa72368. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX762503307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64384a9c3459865555b03abc188f77153493ef2ba2b7588907cbef6bc53f4763. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX872590384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8428c1b131b847089456cb7e8ce7fcd5b299f06e72405e180bc3db6d660b9887. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FRX872562808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dc50741d1ee95e538679155bc78b21023fc08ac3ea731e55a8aea0a4e291a0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX872536196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f41267c699fd3f9596277c056f678314f78a5f24c5b5330283859736b1b15. 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/FRX872590385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4610a501911f119be492e936b7c12e5eab1a63fec96d2b74cd9cc298fa4af65. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6XX2217162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670b9520affd6694077f2623a0793433633e61157d95591ceb5b76a0eb8dff74. 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/CZAM82300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0485e1f23d74a5534d65c6fc9d1eeb82a28dc8647c22d83cf937413a527c4e41. 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/CZUM72400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0485e1f23d74a5534d65c6fc9d1eeb82a28dc8647c22d83cf937413a527c4e41. 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/CZUM72400315.