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 0x0d20375b6712e9d2df6b0f20b8ae531f77801c9048e1eabe751a81501bc781e8. 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/2de2b1a7-88c4-4829-aef3-10350ed3c827.json and https://artists.proofprofile.net/proofs/artist/2de2b1a7-88c4-4829-aef3-10350ed3c827.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 0x88fb01fc2d0ac544b507a2ba5b75735d0a223b71ff12ca3b3dc7a835e6eb3921. 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/USRN12300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf861b646cedfe536dd5c514e80c2a0f07b7135177cc4a1e98883628733e6efa. 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/QZRP42226423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80064c006f381113352e05791314df7a0b76e8190693ab0b7e90266bccdc5e24. 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/USRN12300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38342d9beab22db895fab76ef652b23247a8c4ef34f216a7a47d5e2b52a98abf. 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/USRN12300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7909e56707d07a5bc70152abbd7596ab5d647d0820bbaf105eaecc0f61db3b. 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/USRN12300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4336cf549507faf3d20d5565daa791413eca41a227d594d98fc6cc537b53fa8e. 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/USRN12300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f1adaeb9c4769455f78f6f04fc50aa0afc61ba8abaa6403110277bca09ac5. 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/QZTB82242512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c00eb70b5affefc614288a69d9df35ee8785f8bb5b73456dd0d5dea63374b. 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/QZZVQ2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373666378f023fc55391e60d17880eb6395a292c4b6fd9f991c07a047fe5e899. 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/QZZVQ2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0aeccdde820522595ed95efe2946cbe02ffe66906c0ef058f3f88fde0ce70. 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/USRN12400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4912c0045e3121d2775b6fa08e472f3e0391d9161d437736f6394b890d0ad. 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/USRN12400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851f699696e912c2fbffc61aa5e2c7041f25b9d4d018247fe6786bf2708baef7. 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/USRN12400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac1138d191430acad508a6ea2628b19477961c4ef9127588892de4ca7c48523. 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/USRN12300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3d9ad8603cc73809df662d4bfcc7ab29c88dd74b671a10952736df29a98d0f. 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/USRN12400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e907b38e4201e9a019777090365dadb74419234e2a0f3e5ffc46580dedca3d. 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/USRN12400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e4912c0045e3121d2775b6fa08e472f3e0391d9161d437736f6394b890d0ad. 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/USRN12400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3d9ad8603cc73809df662d4bfcc7ab29c88dd74b671a10952736df29a98d0f. 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/USRN12400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38342d9beab22db895fab76ef652b23247a8c4ef34f216a7a47d5e2b52a98abf. 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/USRN12300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb01fc2d0ac544b507a2ba5b75735d0a223b71ff12ca3b3dc7a835e6eb3921. 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/USRN12300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7909e56707d07a5bc70152abbd7596ab5d647d0820bbaf105eaecc0f61db3b. 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/USRN12300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f1adaeb9c4769455f78f6f04fc50aa0afc61ba8abaa6403110277bca09ac5. 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/QZTB82242512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf861b646cedfe536dd5c514e80c2a0f07b7135177cc4a1e98883628733e6efa. 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/QZRP42226423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cbdf2688958dbc867f58bc2bb0259f8ad31643b7cc65f944553667a1063be0. 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/QZMEP2260882.