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 0x393bb84d24eb7f33a09737f1cdeb92bd606fb211fdf99f8158b45bc0d98ca3d9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a941f297-fc8a-4557-8fd5-bfbb1e176509.json and https://artists.proofprofile.net/proofs/artist/a941f297-fc8a-4557-8fd5-bfbb1e176509.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 0x09866ccb726c8134967d47af24ba5a5d4443bf15a0f3645bedfe01845e77eb00. 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/QZDA62556318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972f4481ea389996eb8ba7459abe8c526d35929569b22bd235f6af39d08f04e. 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/QZHN62524139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc9e2ed816e708c339e07f97db52f5bd5f0519147d40c8783ebda8ffd7495b4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:15:13Z), 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/QZHNC2521343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1452a981ae5b1dc3582a46e12aaf57d3abbe424e952985ef829c6ba485f824ac. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZHNC2521344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b020d2b40f459cf9cfc0a4237350efc5aac630c99025167bb30f36b44f97b6. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHNC2521345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be05b7aee3b2e13f99b2db9bb8090858604a92608444c9e61f3b0bd2dfb610. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX38U2506947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf084ba5ce69ac72d4461a600b1d3c97de6b57dee648bf2d521294ec922c9c56d. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX38U2513926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab03cf5ef2bee41afe51691c8d5571ba74b584588c9d17664f8dc3868d1864. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2501322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df2e3c6577a75a28d7daa26923bcf18319ca4d455d51542047ea98bf16cde32. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:19Z), 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/GX38U2549635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a40bf27bebf1d971441a9d94fea63a32cc12325caa249afd9a044681d3284d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2545561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e31e8e1b3f37e279c123d03fa05bc31aed78448a2d2edd3979409fced35c8c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2584108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc0bd4e4dfc578f58faddd7ecd790190d1bbcce063dae0c1aace0d95a9cf453. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:22Z), 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/QZK6F2584110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666c57b526c7623fa96823ad3b6f18881664a0c5aaecc67394d6432aea9b9cc1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:49Z), 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/QZK6F2584111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373774aa97e77519fee57906159f50a9db84277bda2b98c379469c3f81ea4844. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZK6F2584113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f52da7e2da67d10c895264f23cf9139d8922cf811575e6126a0cc082eddc6a3. 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/QZNWY2543738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f699a7b8cb9b4c7da6fe057d0062e8feab8a50cda846c1dbb0ed68ebf49ca41. 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/QZTB92511334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb5b16751e974b331488250203e75d6d40d31e8b19196a60a610069ae3f9f57. 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/QZTB92511335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0751a796f7525e4d2332c722c92a720571bd869e86647993f09852200348ceae. 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/QZTB92511336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f80085c828e85e92f6e79db4518f49ba8bcfc53f2820eb18a035ac0eba5008. 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/QZTB92511340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a04ef24c6fb895d43bc8463a23d4656d43ee2be763d86975d9d29654addbd. 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/QZTB92511341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541b7bd6b2833cc3e66a4484810574f3f8c6b4988fe21a9a3cf4c85311bdc142. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBE2585454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ca0c9d6bc9ab4a6d44d2fc14ab0ea78c6ed74bd7b2fa55788a72c422c5cd4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBE2583313.