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 0x777145283b84dfa0c1f94df854125f8f34b802a3a369df176420f1fe3b981c07. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2799de16-ad1d-4020-81c8-12a2b433d649.json and https://artists.proofprofile.net/proofs/artist/2799de16-ad1d-4020-81c8-12a2b433d649.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 0xf49ccd444cd2719979b6d9816f39840e5d8c8e2882437f595cf34be5a3216592. 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/QZCKC2200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78815c48e0be172cff8b8bb9bc45663b38c93c2b387e6371595d89f83f80417. 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/QZCKC1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41c96d3ce873b23366876f01e0fe02040aa38ab8adbe8b64bddedbe5e8e463. 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/QZCKC1800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a58f993272460ca752d5efe5682cdcdd1034e2353bf966c72951f6635d39492. 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/QZCKC1800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd85e57a3e0d1b4058e51e5df4161164e234d1cd48d7c2777dbe595ecde4cc69. 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/QZCKC1800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26ffceec5bd6d553fb9ce4d05aaffe626eb51132052e1de7fb20d52d58aabe6. 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/QZCKC1800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc928619ade5a7d8d3c998ae1509794d6a4293d5e86d64af729199b56dd54df3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZCKC1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb236660a8a4beb6fd80d387a41c6cdd71c08603c069b18018e41c1b76c3ed2. 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/QZCKC1800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa254527443d646e73135b0b8e56cc130570a6629bf4871bb0580ab227b68e637. 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/QZCKC2200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40c4800ce497c5687ee804246d1d260f00e5c401b0dc7c406c2a1b9f8d3ab34. 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/QZCKC2200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8468a51790664e684795b14d76e5b50d36388ab7d28a8ef055982458b205f86. 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/QZCKC2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1047c27c56974b9f3da6a4308e421ea1a97840438097a1810b3b949fb03d008. 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/QZCKC2200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f4bd7772f2385cd776f4594473498351bd2e93af1c2390ac80340dd65f979. 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/QZCKC2200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69986212298eff6e20f7581266a423abfe796722452ac2d2b4bf0cf49c130f0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZCKC2200238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1047c27c56974b9f3da6a4308e421ea1a97840438097a1810b3b949fb03d008. 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/QZCKC2200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8468a51790664e684795b14d76e5b50d36388ab7d28a8ef055982458b205f86. 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/QZCKC2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40c4800ce497c5687ee804246d1d260f00e5c401b0dc7c406c2a1b9f8d3ab34. 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/QZCKC2200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc928619ade5a7d8d3c998ae1509794d6a4293d5e86d64af729199b56dd54df3. 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/QZCKC1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41c96d3ce873b23366876f01e0fe02040aa38ab8adbe8b64bddedbe5e8e463. 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/QZCKC1800038.