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 0x81f39ecb2d023099f4ff47911c022ba4857e1e61fff6030f12fb265f424707ce. 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/8034e92a-8a6a-4a76-8be3-bdac518134c8.json and https://artists.proofprofile.net/proofs/artist/8034e92a-8a6a-4a76-8be3-bdac518134c8.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 0xe9dc47155486ae03868672fde6d6b44a0e9d28d40df37df79541b5bb62ab9d4f. 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/USA2P2508599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e28a8a7c56fa3dd6d42bd385d3279820b678c72fd79c31654ea850c2038a970. 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/DEPI82500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d643141a6961bea8b3f112ccc40a8288c853ad11b26242b37d7e6663340582. 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/DEZC62467150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005e180bdae54be4dcf26cbf8681b36cc3965f68515725b39ee4c28afd073ee1. 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/NLRD52424613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c5208d6bb94557eb7c74fe0e3a2e1ef814a897fa8ac3726f8bccff5ee41ee. 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/NL2QC2101598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d15adec45824a0d8e32c4da1d6a03b776d0b7b36262f1184e1611a58db15c. 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/NLRD52424611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a7d60806f7aa171066523cf828f460b4ffdae4e6c3a188aba4bb1b12516478. 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/GBKQU2467071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32808edf14d7cbd4bc9ea41c9e3a7b490c4d5eb18ba73327da0933d7d6774353. 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/DEPI82414518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d1307a807c0a97e9d7d37447909a4d8b7236c218cb5095ff607220415dd2c1. 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/GX8LE2444135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900dc3ebbc7d87bfc0691275538816c564060708afa409dde4691289fb688c5. 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/CAHQJ2441072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494a81175187a2c6549e11be7364a5c71f05d26e242de14131a5a6fb2710c3e. 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/NL2QC2101211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d1624024d5de65b00c23e6d3ae921509f0477a5d74d5ed446d3371eadb32a8. 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/CAENV2306186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978214cf68dc85ab30f1db56eae08adacbf7a020fc38cb5f030dd7d74a7ecfc3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ATEK02355515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b795e33a843f327deaa1a25821fd37f96088158f88f962a6bda3763d1848637. 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/GX3HH2309708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba6e6e4f7ae2aff6f199d8831279cb9780d7453d58c26f7a9b2a087723abecd. 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/ATEK02355189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f303b22a54b2ae48f7efa9bc1c4bc084c9cc0a4827923cf5311c4796b7a44a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2P2317946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e07fa757d2cb3c0edf26f004b693e7d257f1221c90d6fbe1e13c7667b4601. 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/GBKQU2343789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9858579ed3e81944b3c5830aff752b27ed117c10b66a05e886fb63c3a2d3c8ce. 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/US83Z2312415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f47e2b452b8c5eb8043a03d79ee0621c1cd28402b4bfb58afadfbd5222f310. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ETR212300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17504e748f47538ed3beafbea13a1be3121385f877a3471986fd03f32ee90ac7. 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/ETR212300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee21943ab648a180ae77d578133868412516009d1a1781fc5a6d44a71a442425. 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/ETR212200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb765b5b13f1924e39042a3fa170409fef2216f1bd82382fa5e34b0102033bc. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBKQU2334320.