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 0x61e3bee7bc5744df274357895da62082499f414daf095f871060f3d5792bf9ae. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/229335a5-266c-4eb4-8b5c-10be100216cf.json and https://artists.proofprofile.net/proofs/artist/229335a5-266c-4eb4-8b5c-10be100216cf.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 0x9de2334217c27f0d841635722496333e08a6f1c7dfc4883bf166c347eb892b15. 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/QZHZ31928307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16dceae330985cb76e834739a732c141cfb1c299d608393645cb0aeb2f174ec. 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/QZHZ31928314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fd82d7c7de21b5e5576005b8e25c187533bc03d2b21ce17ef77d18ace32d6e. 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/QZHZ31928315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e48239c1f1570b077676aea845768c3425cd3d8f2ed9046457c9aaf7eddd1ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ31928316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5cfd1b75d693b4cb7fbeb38aefa48382e1f14070e1e4ddf1dbdc07dc1ceed. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHZ31928311.
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 0xd4e4bf8f5be7fea0dd5bbcbb3d9e2fde06c889b650abbac2123cd2a7dca3a9ed. 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/QZHZ31928305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686e3448919f9ae7518d09c1f6edeecc646fbad817b8d467202791f1512a6de1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHZ31928306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906a3a8abacd8fe31545a078445a7fe7429e85b5b0bc2dcb0477458e794fcaa8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHZ31928308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02b15fcdae1317b5bba84a44a1467c94ceefba5fd3ba45431757dc74a4fda6f. 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/QZHZ31928309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380d5c365fec7c95b4265a23db32b6ed86d68fa412f6437789c1002befb8609f. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZHZ31928310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3e91628937ccc2f9ff24e313a0c793e28e8ed5cf5f80345e9f98b856a7b311. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZHZ31928312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77ab651287a92ae5b7d3894a201156f278262fa435543d4f1c5c4f517ce0821. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZHZ31928317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7339c109d1028a23264560cf258179c279bcea51600e27321a0386b81786bd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZHZ31928318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c18b802c118f06dbe20feca4796237e28cd54c2ec7b432c34bba06853a27e61. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHZ31928319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746df8e325a29ce828fa82465be7ee60bf894c92a66b586b4ab18c567416ef0f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJY2405995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc068c032109772166acc65e220f350dd63800659051cc911f7635b8ba502ef8b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJY2405991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b202d617aab2fb7efd7f316f1ae5387e8f08d945eb9ee283ee82682dea7c5c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZNJY2405992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea35b310e3555607d1f1cb0afe66ce56276ab0ed3f2ce52e001a225dd75359b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJY2405993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdac9d213a8d172eadabb93d2338247b2e8c0f25bbddc06c88797e318876acc. 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/QZNJY2405994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c43fb1e0ba75b352c5b714820ecfa3c9df77343410194eba8ddddc4d1ed3d6. 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/QZNJY2405996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265bf3e63df77e2a37c9d5e8582b42f5ae3722fe80c3847ab0f1523b4573419. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ41917208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04363bf47536d5f0c615750e16e199e4b5847187300cd5dc00eb36e6aac19c3. 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/QZHZ41917209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578631a9eba8e9ea460b4853de7756796ede2701a603e513e9bfce39c06f574c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ41917210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e33007641fd6b691aca19b04dcf532f86b896085e55dfc2b918bd29e99b67. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ41917211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9160c6f159ab1adb3a5db696619e359816ed7f3fd882be80f9af5111c70057. 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/QZHZ41917212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef59703837c25acaf0a0354965fe59f6146a2b2aa933ed2e2fcb7af18347f07. 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/QZHZ41917213.