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 0x854378da1aa1909b8be6709c2e84d1b0d7719259f341aa97bb0510e63eb3a058. 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/74bbb2a7-b11a-4513-b43d-61e6c1c478f9.json and https://artists.proofprofile.net/proofs/artist/74bbb2a7-b11a-4513-b43d-61e6c1c478f9.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 0x3290e119cce42ec4e44a740af7054975c7c291f3eab7b80e0ae3eab3f2816595. 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/QZPEW2130319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d95bd8d5d70176798b4f366445a5e4e8d31f05f951184a5c529cb9da88c093. 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/QZVEM2331761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f7c6f9e700b919b193a4158bba0d6fc62404e4f206922b0318bab6fa521149. 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/QZVEM2345671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809101e4f88a6bd2dd4f1eb93973cfc87593c88da9a53dc41fd4643330382ebe. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:31:36Z), 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/QZVEM2350081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0357a7f02d485774cc41f989a1d1a9a06d10ced82a2eecec5f3e7d16b93bb9e6. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZVEM2350870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bdaf47ae07af855d55f27e2a73c5b454a93eb105171903bde4d2aff25b0c4b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZVEM2358665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ead23210ae39acc00132147f0f4e818868472401dcb32ad11da921522f82f. 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/QZVEM2365874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bcafaa868a8d14b7b5c066252aa87251006d6b7dcd8d0afb00aa06de70a636. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZVEM2380849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416dfb7e79615637487a161d3f168640851efbf730b1c3c8333c2aaa6abab50a. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZVEM2381615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8751587155162683db2e662c4c302c977b39163023c7d4d96db47ab569364ac0. 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/QZVEM2381614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c98f9926ee180de60eac6174c4d692c1ab9fb90d93030fd925cdce24fd2278c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZVEM2382029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a15946330371dd21357bf0239df2fd75e4319cc44fc0ec26a3129c42f8f9d1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZVEM2384590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b91dc6211c0a6bf7a9d038fbb4c59cc9db8f55a03eab646966978155dae01. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZVEM2391265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d833520ed82c77d26085c52fdb5616bc9f64c4ec40cf1bc934044a06e6ce37. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZPEW2498010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7cd2ce95f27812eda515035df48e2b4529ecbcda4d3d7269d01f856680a2a7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:53Z), 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/TLVEM2459557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e93dbebda1fcc39dfd4b4fbe50c7a1bf7460901f9b1b503a4ba48b24279229. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TLVEM2459558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735f9224bbcc32fafc6b62527dfd448620d8577a95c717e61201d664ff49d552. 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/QZVEM1833392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d9d6d69a0bb11e614bac7f8c002111cce9a3785a4b8c46ef84d7236297be96. 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/QZPEW2524467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b706c2859fcf27630d777c27a663206b1fd9e4009fc29cb88eb9c126598db60. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT2VB2503943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0512b3eb0d0ea6ad53e1e747732c39ac060049102b72e9bce3789b356b6b49d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZVEM1811819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b854a67a8471e5b2e1460978963dc5820735cfa6efab2a32f96dea88e2d3f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPEW2495749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d833520ed82c77d26085c52fdb5616bc9f64c4ec40cf1bc934044a06e6ce37. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZPEW2498010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f4d0fb52894cb868a0cf2c7705213d9931ee210df03b9647253bbc27ac2fa5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZPEW2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b871525dd53e3502b8b75332acef8bd23db714751c6f286b1bfdf066da2b74. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:07Z), 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/QT4K32518107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c4bec2c253972b2761a536751ddc9d68dde1694ed124290d031cd90792cd87. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QT4K32554242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4409c9ca168da4cc4bf4a5409a1a5501f90ee5f7f5f88b237644fde285f982e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:40Z), 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/QT4K32522637.