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 0x2ea82761759593fee136eb36d1cd00ef01752ff3d223ad3af132639212c1ea86. 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/e0d0bb91-8a0d-45c5-9b58-37c14228db24.json and https://artists.proofprofile.net/proofs/artist/e0d0bb91-8a0d-45c5-9b58-37c14228db24.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 0xcd61c464c4efb99e1537cc95d192e433858875925bbac77b46e4887c3971b3fb. 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/US6YC2203575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4a3b6ab60a0f85f2b90b342fab8b977e7c5db8e63c36cc4fc9f816544cd246. 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/US6YC2304830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acf41de054889a715ee3c492b9ac73d3f3f83356e44ea034292e966378fd05a. 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/US6YC2103203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86376a8d8b4fe6caa5cc2da330d85990c54a3adf6bc5d449613bbdc983916d. 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/US6YC2002981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe34aa5e44464f7dcefb8eae4b48721f5030761ed27d281318e46794fd3a246. 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/US6YC2002765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a520043927c5e476678226797278c0709631c5b8e921d50bb60048d2a8f94a. 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/USTC00953903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adce40c1a9a2a60b11d38301c2a96dbab12b1a959229532d8ea4fa9977d93e0. 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/USTC00954266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6872b6fbd6cd4e9ace347bf600cbb54ed05749e869737354d379be3c93cc2fa. 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/USTC00954509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221efa50a0331ede7398fd1d078586e00abe751ce284eb6c8847ace1c585bc99. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:50:48Z), 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/US6YC1901738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc515f47777dbee9b5161e1f01dd61e92f481c7b2e1245b68804d19f2ddef3fc. 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/US6YC1901627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1fc0bdf703a19090a5689bed6e4f8ba41bb53c34397a3c493d2bfa72dd48e7. 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/US6YC1901691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02d974b9c08a07883633687399af2d25ceabe761f3d06eb3b2834199d7775b8. 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/USUM70615344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6116411cf33b67711726c00ea512e473ab52cc7ac76ee744af78551ec0ee7. 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/USUM70734483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc515f47777dbee9b5161e1f01dd61e92f481c7b2e1245b68804d19f2ddef3fc. 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/US6YC1901627.
The Return Of O-Tumma (Screwed & Chopped)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62293ad94065a62c009d7dca2af66f0de243c673212e1310e0868f1fcc11c37b. 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/US6YC1901682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465de441442f2103af53dcf567f3dbd9496c1845a5a04f1d8597c3da30a76476. 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/QZPEW2451348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef0df5e1e8d829c57231a98da92012f89157f4c6058b38070beffe2fc1fbe6d. 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/TCAHQ2393070.