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 0x181f936e24f7a87b1924a23841ac8d4e6b6a9d46bd8349eb933d1cd09eb84400. 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/be66a0a9-b93b-4706-88a7-7c8d5ee573c8.json and https://artists.proofprofile.net/proofs/artist/be66a0a9-b93b-4706-88a7-7c8d5ee573c8.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 0x74379e2c56aa117a0acf8ac7719be6a09bf65bdd7fa5e6b5dbb59b54a4b4dc26. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62081248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24ac55cbccbef3af1a0e8f0de930d610b6d2b948292c7e9c00783d6a208c9d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32048110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d775c145c69d369d9f71cbbe39bcf2fd5a90b7cb0bdf375defee487d221364. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN32048111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eba912645116f5bed2ee13ed29d7307706a20c84efe1031649819c053ddd9f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN32048112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc3e85dd5de0bbca4f7c99bfc321f1c16edd01855f2c24714bfad3d5fa47df. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN32048113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ce9d8fe8bbd7993827bfa9579a04d068c140381ac5d9096fce6c97bdc9980f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN32048114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91764fc087ba2639919c4b7beb95f34ecb945d63b42f0d6aa2135427bf1095db. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZHN32048115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a2934c3f9cb26a291133cf7a8275a1098cfb074b6d05ca8d855e8cfc1dd96. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32048116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a7e9981159f689261b6f27b6e525f49f8f9456ade15b312ceb2a2852c1064a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN32048117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bc7aa9ab4c34cecae41a301cb0e82689b0526eaa195df707b89e4c54242665. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHN32048118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2583372b8277a58cd2b13dce35880f32f33b15c25395cce710e3e0d8f0831b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32048120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad03c7f2a0106286e8c0cdeebedcf9e84ad702cbdceae3b85c67923e7b54db. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN32048121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aa0b478baf67ec87dab23c61bb66c0ea7f8db88cb499d5047bbf755040dbe9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN32048122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c929279cb26f46394caf84b63eb789ce91e2ff4944429d75a7a8c1a16aa7657. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/QZHN32048123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b83aa6e9c4e5b0c4d440dfe927bd9fc87f9c90090505086eba445126c03b9e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN32136989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7c73a8da78e0e8df2ea963d166a29ac7cff22efe19ca9fda5b92a2895eb5e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHN32136990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039417b5bddc09737087e1930d5c31b9f0d3cff5197457df231afb88603bcdfd. 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/QZHN32136991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdfb83b66bc25a8a1d57e3d1de853923d72127b2748314560da0b66ac131464. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32136992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df344144f1469b9b04e26402dc052e6fb231d68c4bdea50db450d191cff6c2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN32136993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16199d62a7cf5597d6fa0cf4b4a9b32f63ba8bdcf132b16160d5b1b4491b1371. 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/QZHN32136994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8f5e7f1ce4a8f13e5d3d4a3c3873f1d60e8776b1c936dd5ee0100ffa596ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN32136995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e79423552cdc4a29ac40242624cf8c3c8b1cf3c25c432f744dd38bb5ca96336. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN32136996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c38ef8c9c9e2c2ac6493ea081b7d426b53a237dc77855b8c1dbad4c46b75529. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN32136997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6cfef304e6ca6f67e128ee16fce808cef31171fbe21b776bcc851f181df8e5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN32136998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a33ede951c6f3948811a2c0c39647438c3c95b422ea3766294878fefa6088b9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN32136999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67440b26779d722d4cfb2cebe9a4cdf48be33b66d31d1afdc0dd505a1619fff. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN32137000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650558ed1d168d6408ff5f4d6670f5f2c384fc7aee7e09823855f4afb2acee0a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32137001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d4d9d9283b5159d60d62f2ca68f3c7cc361d8155eeea988cbf70c6653b6bb. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN32137002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4974dfda0027b7a7ca7d13db69b021713ddbc14616c912e183f6e2bb156debf5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN32137003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2309d70b09b8faa4c29c027e4752bf71437b4d4d9a31c5628598d00613c5ec. 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/QZHN32137004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb464ec1ec628eca7965d5a8fed053bb3ddf4201f4478418fb37c3a353e2d576. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN32137005.