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 0x595551dca0edf87ac47cf9a0a83c34e0206645d0e659c260892dc6005a795edb. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a90c43-1d99-468a-a1c3-e90060e66aab.json and https://artists.proofprofile.net/proofs/artist/d5a90c43-1d99-468a-a1c3-e90060e66aab.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 0xccf75302cabf1bf8e1716198495b44d742b6c9228022e180eb24887cc6658088. 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/QZFZ62023268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a42375277b714478b6d725020c99ca52eccb960dea61499f3ac20eb8948dce. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZFZ62023270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5288e61947169b7000277fa202c2c9851bef5a6220986b28b684961d569f7cb. 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/QZFZ62023274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfb80ac396cfdaff40b1caa7a102ef5c580bf1f0fdc52e16ca24ef4afbe64d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UST8K1406542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca68255fe36261daec78995e0cdf0a2f2dbad95b6271f5382d2d5546679bf975. 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/UST8K1406543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb38d99523a4acdb6a25102a09e54199ef08cbc3c4f2b43eeacc6eb0dc8342. 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/UST8K1406544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb591c9e93997f001b3be896d2419e159a041225425ce21d67690f714977d64. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UST8K1406546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884cf4e675035aced2a34e0806d84af7c3a3e7a52649cb42fa2c5447a51f3a56. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/UST8K1406552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc312f2aa3804fa2602a1abeea90ac461269d571905ca374290c45a6bdf8e4f2. 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/UST8K1406555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f6793dd6e6d17f30ac8b931d6caa148f5de5bf69a1c9e4916ed8228dd0f26a. 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/USCGH1242541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfaf976a5e0be051f21fb9d946f9585bd432ace6c1a7f3c79f8a9ae8de8c5a9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGH1242542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f554699d2918bfe66a8cc9b1437102102e3b6654e5b7a3cdbaba12d1de3094f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGH1242545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116380706f14eb10c139317d17230019e14f5d36666288724ce9f454444011c0. 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/USCGH1242549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965e834c9fb35341c3639c445245bab79717721cb770989b2c0080f85e4557c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USCGH1242555.
Shake 'Em On Down / It Don't Matter To Me (7" - 45RPM)
Darlene / Be Good Or Be Gone (7" - 45RPM)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbef5fd77d283b9ca66de1e504c9f88652879aab8202580c323190d508f159. 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/UST8K1406700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0456c3b33d9ee195ed435c580dcb252c0e3e34dfa0ac5b630f3b0a8a49595bb. 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/BXN6Z2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587d52b549590227b85e243813455614ede8810c7c1a84ec7c292aede6ecd816. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM92090347.