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 0x59db619bc4842153e5de180a562fc94e547e5fc5689c243f692609bc75ede741. 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/ba2e4190-6c8b-4d81-9c60-7d0c9f1dc1fa.json and https://artists.proofprofile.net/proofs/artist/ba2e4190-6c8b-4d81-9c60-7d0c9f1dc1fa.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 0x24c23a7ea1941231b1185f87f79808fedfa905f2369473aa70ef4aed279f0fe4. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USKP92000001.
Isn't It A Pity / Loving The Alien / Avalon / Reckoner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634cea1e5a769d49ae7aac7ba4131346eec6e3b02637a3a45b77002edc8d421. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USKP92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e83d8ac2244ee40cdb14fce74b47a418b5637cb82fc14752606a1763289027. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USKP92000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172808692f2c7c8aab8422143649e213bdd408d12490185475f5a1259c594d56. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USKP92000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cf124ec9dacb36f62f6127f78e8aee13a0304ab055e151ebf1e17d49bbf102. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USKP92000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634cea1e5a769d49ae7aac7ba4131346eec6e3b02637a3a45b77002edc8d421. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USKP92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d56a9b11949c17a200f465e71b992ccf5398bf15eeb2797b70e306cea073e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USKP92000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703bcc8ae64bc934c6b2d5c2eb944d1293f1353df160fd046d188654aeb953fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKP92000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e740204023ab931d7730e863cef110b7576657f1a48569b91d6d7ccb98b0670. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKP92000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a53baed40491b738c322577ab083f914a3fd056b6b07bd5c2337ce2b7cade. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USKP91900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041c6c7c6ceaf9ab171af23a35ee0771e2df8e5ef807ec6c205f37454d67d0d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKP91900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7666c9504d5407cbc70251b087600a0172f2e0707635bfbe52af7f9a6b270d27. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USKP91900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1ea124c7b604663357d927397e1e36412c2e0c00c87cfa800fd26ba3ead020. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USKP91900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db245c3cc30aa036cf22dc909e9e1a64864e01e9b4745478ac99efde825d0f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USKP91900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34f3d752dd774ff90f1415ab59a73821b192fb5a1fbae00cca9500d5541b5d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USKP91900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9804e0bd74d9e44885c8103346399ecb57e5144bc5a882c25f6a5b76335f53. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKP91900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f240b006c69371cb0b0df06ff63b6d46d9587510d41a8248933ae6645d92ca0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKP91900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56531207ccac7ffc91b19939fb910139feac8fa5765cebb1b27897aa4b928452. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USKP91900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42cba30a5c4f586ac088526683c75cf59fed356a622e807b024874bd3936ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USKP91900010.