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 0x281d5c8f8b5dd3ead81786c5cdfe839f8afdc51a8194ba32a7c763d8a1b0f7bc. 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/f9caf46e-3360-4af1-b90e-c649e59626c0.json and https://artists.proofprofile.net/proofs/artist/f9caf46e-3360-4af1-b90e-c649e59626c0.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 0x8eead47d7416c5c12c4879a3914a7c76591999a15183c0293e25db19ba1be66a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACP1648079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf314de999ab438f8be7851a5ff6276b290143d45d84d07a4580e28e772e79bfe. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/TCACP1648081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7fb784bcf0c6eabd8767d98a518a83550f43c2935c213a593459a9d773ec5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACP1648086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb8d7eb304da0fbbb63bc977fb37da8fa210a15b4bea61d4a99607434d3052. 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/TCACP1648089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd472c323a5522698fccf6cfad996a0957f9353773b869ca8e638801f3990fabf. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:10Z), 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/TCACP1646630.
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 0xcfbfc96437a0ddf39c093ac17b136da752bbdd83123d837deb33074ca144367f. 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/TCACP1648080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2deae51ce665802a5ee6a9d3afc354ab0cf9cb67d9cfa12bb81cfa1de79381a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACP1648083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea0a4a50fd67725f1c5a8c556ecd87d84123d78e266b434959b447418e7d09. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TCACP1648084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a9240d122afb61cb3641dcfaaec24dbe5412af2c110d4348f27b8c32f186b0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCACP1648088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9b4d061a18689c986dd2a3fdd260a90054fa9a48a297ecc5c02a0b036d022. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USMN22200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd096108147b58cda3751a035f154695f6b82fcdd43db997285ae6cc4fae5ebc3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USMN22200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e6589524794a3233812f28d70ef1ffb42c023f9972e9af40d30b05de1557e. 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/USMN22200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1833e041813591f462f600c0c5b1e90932ddf373b1a1a4d531f9461e32c54f97. 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/USMN22200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72b58c566e32dc771d0f84c242f95be28a11c84dfc3d7ae7b77f41de83227a. 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/QZQNC2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fc32b066cc77b3f7b7266b04367db76b05d53d9584842c410fc8ef0dd72546. 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/QZQNC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e124dab8e836034c61078f4473e1be6fdc8b5576eb8df965b1de9993f8d7148. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:21:05Z), 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/TCAED1985407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fc80a21b46b9bd122f566e756671aeb11f6a7a1df2ece20b6a20b23b17ee54. 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/TCAED1985410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd3703d183925f871bae89283a723a96de58fc02664fa6df85e53cf399aa6f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAED1985412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe428141663e716d3357e304bc201fb661f5cba057a934715b4ad1b04ff17e3ff. 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/TCAED1985414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a0a6e9b5fcdb13b846c290fba8ca3dc517932fc5d5d594f41c325ec1f61926. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAED1985409.