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 0xb0e610e7bcb01df4e623c5e297f005ba59821b7b675aa253fba2f1002285d4af. 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/c6c39622-2d10-4a86-ab2a-30101d88b922.json and https://artists.proofprofile.net/proofs/artist/c6c39622-2d10-4a86-ab2a-30101d88b922.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 0xba40cc82983736b227aede8d66498cbc62aa12c331f93f3a2551137f82d63125. 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/QZNWY2276803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854c390bc5586ef74d548031dfadbd7b28d69cc268dc0aa94316fadcac64ef50. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZTAU2250135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fe837d33efbf498b46cfddbced4f4d8377502e62380181361f69ad07f5f268. 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/QZTAU2250136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25bb9c43d046a2751d0db20c08b6dde43af910eb8cd24caa91de31b7ad3e8d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAU2250137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e80b0f636f54476e3c949892bb099221879f9b03384ba526181acf527f489. 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/QZTAU2250139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423a832cecb9e71c8467962a60e0b222bff56c12f90c0805457308c0c1b9bb90. 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/QZK6H2272382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6587a107e043ab8794b061628b72ac26b6aa16a1f8bebf9aa3c14851099ee064. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6H2272389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ae96e4228f0996875c42f1daf90b3e9da9de794e6e29b4e2bce49ca3ba31a. 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/QZHN62290897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee22fe2621a232f2ac9553ab676dd8e86fca49a3d7c32a4ae74a094e135eb650. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62290898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50f2e29660ec8f406cbb16590de95089a78f96a9557572e3c45af657ef107d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHN62290902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1d7bbb1637a4ec270480455f67eb7dcd61510e370f50a100f69a4311340494. 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/USUYG1330784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef1daea5ec83eafe7f93a499190a80161fae0931c2fd1c9eb63ce6a490f3d5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USUYG1330791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb0f35df26bb44f33d48b049010f83ee9658d1e688ae0af635996819b97e783. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2303724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec00f0c9d7db4508206acda2ca5de77c7ae76cf8f3d24660debb017d7159e8e8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USDXS2303244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a90541640e90d8b6c17990b67907e569efb3f2e900a282df09de3e0a052cf07. 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/AUGBT2303738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd2d130413e5dd844a3549ce4720b79935e49c760fe4615785ff057624407d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2302244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77b2e2978702aed8651b9e867deac1fba941cd0d692d9f6965a23f59be490bb. 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/USDXS2301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd369fdf67a2e4e91b77f1588ecc5d47bc98bc4109a0a2c9f635fbd4c3f1eb0c5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USDXS2301454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6eb019f4afd86b5e49ae72d544352825cf4ba2e2475e370b53011f4cafdb60. 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/QZTAZ2254652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be650229100b07023d23c9674e21dd778ab0fb2b60455ee050c5e693bd2d033. 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/QZNWZ2210515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f557a4ef8e5364c2390e1854a1122936dee712a9d8201756ff4943bc964a06. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USANG2200418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c21aa74c575a0c2a4279c4289a7323aea5fdfeea28f0d164822947adfc203. 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/QZK6P2247423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9720fad1a7faae937f04e2c8bfdb56f8094c06c8eea82fee6a7c43709e1bfe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES72216224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ff4de1f73468ad57e9d2510abab87829a303d1b41abf779fe852923eff4d9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZFYY2294802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25bd5d01f54dabe1a396d02d8e5172b3440d8edb2dc21ef3f782eb51e2dca75. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZNWW2070965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f141e78d53515a79b3c4e2f79295732fadf12ebdb16aa92929cf5ac8890947. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZK6N2023306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd7751bc00fc734a20d1034a53a61b7c5d8ad4d21c75b4982c6fa47f9c0973. 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/USDXS2401753.