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 0x954c135e63ff24323eccf2fd9ad5e7ea7838ff71ef81f2e26eb562d9c7302315. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/889cccf1-fe07-4624-845f-3d84cf1e3eaf.json and https://artists.proofprofile.net/proofs/artist/889cccf1-fe07-4624-845f-3d84cf1e3eaf.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 0xaa7a922ebd8a35c67487a0ec13d2951f13d6bebb856079d666db8564b4474ea1. 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/TZA1X2200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad5ea31a36b98c889a30b15c7f26a97ba94f5e725be7bea1ad6ff3489344597. 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/TZA1X2200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d747ddba6fdcd9be0cdbde382bc99760587942d0744388905db31aa8eff8c4. 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/TZA1X2200616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd120db3caca7c416ad55da2a3375af70927700d49841f6c4d9e8d70b17928bc. 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/TZA1X2200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf109831dd9d451096bf3ccae1fe5551251b4b5cc2a7818ebf684b21b3cc87bb2. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:17:24Z), 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/TZA1X2200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d20f02950b1f2ae4c78c06eaad69af82ee3a2725b56c17864d66f5ee0d2bd. 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/TZA1X2200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66954e6118f26ad84afd878f8d3bf3eb781de04dc5fa3406da3926f686c4885. 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/TZA1X2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3b0a593841131fa837985624580fd4781a87c3005a7e78e95b7cbf6e7f5b6. 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/TZA1X2200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4625d363afa6c5112a6ac29e924017fe98445d4d2dc7f6be64b444e66adc0a47. 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/TZA1X2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aa54331a73e268bbed335c57fa9c555f7172e527b5e771aef0d91682935c1c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TZA1X2200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa763c16facf96c7333701e9077fc8d7af00b7f2c64ab8de43982a1cba2321b02. 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/TZA1X2200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b18cc7472ad94ed35e8f5c85a9b9868efef81871b0ade73347b75bde4aed5c. 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/TZA1X2200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d607a9a17d95f08601b6a02d82ac010314bb1b21b8b4441b983f8581f8bb69f. 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/TZA1X2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd73917ee2eda210d79f91a55e56d6cb45e321c22d17fa6917605fe7bad0901b. 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/TZA1X2200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6e58b0cab894e32349fea4c047e26b651bec3585a8a1e0e9dc7338c365418. 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/TZA1X2200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935be3bf0bbb72f325f985acb78356d3c810549659f1b661663e37658d12aa7c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TZA1X2200614.
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 0x303778b1447ada621368e5359be722a604717f22798f799e5ba3367e5e50334f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TZA1X2200615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0089f70e50180d1be24719f3516344d28c53fe628ccdd0310c32b87428129da. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TZA1X2200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237566fbf100352ecbb3d99f6a968f7c329ce572fcf270abe46261c7e8abe76c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TZA1X2200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef81d0d9d421787c7c42215dddb9d5293d895c01d18b214c64c431ce6c00b97. 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/TZA1X2200626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60a296a021be0a7c6089921f555d522c667f5f728d651d98e9f381727c59b42. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TZA1X2200629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8dbfe4edf634c4c5da7533333625572a39d7669779af0a7a357c00102b15d6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TZA1X2200632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54444133a6d63987d177704df91dc630ed2bb15fa9ee687f959966a7064b3d47. 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/TZA1X2200725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bcb20e323afaf5a62fa65ddcb63139d53270ff4602e9faf28123e32eb7e213. 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/TZA1X2200727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388e8bac08f9b8f0ef4829c7e16977d137058afdb0d8543c9285179a337c6443. 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/TZA1X2200728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115234d3fca0f3b7e1386408703d1aa7e7c7f7b2c48144bf0ea348e760e96e21. 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/TZA1X2200740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e64d36b428ded9da632c1a5ea659cfb0c06b0da1e9e9b63e56790c333e8ce9. 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/TZA1X2200741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1ce7d26a6ec18f2af70fc3f464e7147a3a04a9fe0fac2fc871d88296c50487. 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/TZA1X2000672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5261f8519e991481b92899dca77104c20b21c250d3ae69be7fdd893591afe. 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/DGA0M2375488.