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 0x91122cffc5254500e7b87843a96b7f461a266f1a06470c0b54b1144ee1abec3c. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27e2ec5e-3c6c-48cd-b3b0-f00887e63997.json and https://artists.proofprofile.net/proofs/artist/27e2ec5e-3c6c-48cd-b3b0-f00887e63997.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 0x9c3fab326b5f1908f81c5528627bfbf6d3d2f35f7fe83e4586acf8de808b3874. 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/USHM22296216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe28f3277212057bc964aa070045c991fd9d91bfa0bbcabd672e408a3118690e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM22296218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26010cf9f50eafba70f2e91ede76344b2a1dd34618a90e8543ba3aa1dbc7ab2b. 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/USHM22296221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe619e8cb423c5fa6580584d2a0255cf10269acd507116272602043b20280b8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM22296214.
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 0xb760db089135fb254dbd921cb5c9df9a30e98fdfdc5b2fecde4f984e1b5001bd. 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/USHM22296215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369e0742e7127768e69509d02b13ab91404f51bed85c14ae22b140d33fa00edd. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USHM22296217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e62cb1b7f8df63bcea247ecc33a7ea61d5477990093ae8238bfe785a809c0. 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/USHM22296219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a6e7f87f44fbc97704fd9147493e855902c42acdf239974e6d70b3cd6dd4ed. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USHM22296220.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d6db53a96b088002fea193fe99f7a5d7d123b5447265477259886e2045c80b. 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/TCACU1696652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ba16a254386eb8b77eee7ea182c1d761923107ea4cb08e8c68cbe6f0d7506. 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/TCACU1696656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82915f26c09846d4f2e5905faaf059d6c882574b67eaac98a0c9281e16c33697. 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/TCACU1696665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8850e558801dc165f4fb1cf229ef414d6d7441b4668e5e7f1ab0f9818b3cb. 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/TCACU1696671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aa99e536f066f3526838f9a9d6f21162255311d773751101ce8d8266db28c7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCACU1696650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2137ddff55aa7bc80030401aec68a19a3d4059b0d385cc66001931519e0c0790. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/TCACU1696658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22f4783212d8dce89b49fbe04be7d0c1407226682213ac21a7b715513c301e. 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/TCACU1696661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230a223635f1764a31fe3460ddd58a85b418a915120b4807b40db315ff7bff9b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCACU1696663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568c7a96fcad85d2639a58d811554655848a5313397925a9304731cd7f33c8a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCACU1696670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4975b320a22dc42e90635be6ba3996585952e336a0b2b1c40261fb1972eec42a. 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/TCACU1696677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899977f322b9ff77d49cdea792babd82ef7bf94ffea165aa10152480ca1ddd57. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGJ1890551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85b97ecb781ddbff515cbd4858adebc2d92d8a59e56d3fa43075f5485681980. 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/USCGJ1890552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ddb3cee8bf70461e5ef14c045aa2a5c294bc3bbe689f190c48589d9cafa459. 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/USCGJ1890553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d26861838476bfbfe2a1dd97d7f085b42f6269161afb954d91eafcf6aaea8cf. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USCGJ1890554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736c47f639509cae252f21a69118c4e52580a51b9ffa5993bd390162ba381286. 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/USCGJ1890555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74a72d8533884d64ea6ac1303fb6601cface5ea0a2962d851902671f07b62ab. 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/USCGJ1890556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300fa2d898d6d91600a96041beb32ebf22455f748d77c96f00a749811df1d504. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:20:59Z), 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/GBSMU8657328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6db2a2f20dd24b681d2472fceed92b8f6d295c64bb670336d873d2be0b42c. 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/GBSMU8657329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdd88d70b84dd8e366ed4537a0a51f9fb1f23bac728e76f883689c25ebddab8. 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/GBSMU8657333.