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 0x76b2139fcb65191d563c5a7f4acf1a2b1e64c3ba966d465073d3e88ff9496c8b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1d02b1d-6f8d-454d-b020-76a0b6704ccf.json and https://artists.proofprofile.net/proofs/artist/b1d02b1d-6f8d-454d-b020-76a0b6704ccf.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 0x1247b5a546ad3da506e5c298bdfc32d66d649e405500fcbf32a45fb75bea38b9. 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/QZFZ62419644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1d26120b7fd909cb26d138d24a4c7a483d2f493692e3b875902a4086145d24. 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/QZFZ62419646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bafdf2e3be1ac92e4bf3097a664e7728f35f2fbea08fc837ad32c1e5db4e08. 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/ITMDU2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb14048e9e8feff2713795b45df054ae440b941d7fed75aaf0783b64e4207f0. 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/ITMDU2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bd4e485f1213d21c30cc6ec9fc8e37100a8ee6120ccfaa6535ebddd17b729. 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/ITMDU2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a763df95b689cb839b9d55658564181e706b75b0854ee6de9732707b1c56c04. 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/ITMDU2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70bcd3192a7683be0391d0b356b2e9443eb4ab0d74f0cc95c8369dc5c8f196e. 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/ITMDU2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7137f0a50a0ccda2323e7bf588f0d0c0b9b24cc42ad81a1b8a167e9f708e4716. 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/ITMDU2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe311b1984df473683ad168930e9becca74968861c7573af5113ccdb2df0cfbd. 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/ITMDU2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cd1df6dd53e1953b731d05c4595f006460bc7a6c1da9f79f638ccf536d703f. 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/ITMDU2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069080442dd6cac407c7ef168bb04edc0c7191e25d56c703dddc21e65397a77c. 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/ITMDU2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aed2e05b8f04b78a53770ed8223182b96d18fbd51e263364178d622ffb65d36. 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/USX9P2482791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf448f6a3a87e7e96f917ee34cdf86f1cb2779dcb8325696fbbaa0639b04ffce4. 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/USX9P2482793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d68616de3ae2fbecb65627e6ddbb7b8c21c2e18ce65bbf0ba226675df8d447. 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/USX9P2482794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683f500a2775be59f7a19e6c9904a62339f31c7c645fcbbe43d829f41b4361f. 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/USX9P2482795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905ff94403f8bb41cebafbb7bae483eb34e5501140cb5f02ac25eeee960b921. 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/USX9P2482796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec6fddc7e313862617675f21374425a418834af5b6c0e94a59cbfece3520e0. 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/USX9P2482797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836505dcf461fe098b33b4167109c5c70cefa451359f81b38bd72e6aa036034a. 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/TCAJI2553526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f2210217da65222b6ba9ec280eb9d76f8846145fb72b6b1a4a59653730942. 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/TCAJI2553556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357dc07e538b137f7bba266aeb15c9cac8596338aa29f35bbc17ca4e00a100e9. 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/TCAJI2553577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c733ef0b2ce56ed40ae2e7575914c0cbb7b732866a9d00ec7ada911735e1b2. 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/TCAJI2553584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3897689a9757bbc84dbc751688e8dd25a32e7a2af9392b12d15087a5ee13efec. 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/TCAJI2553597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bd74f1ad94bf314d65d191095c12a9df73f213f81a742b6b129f3a35e332f8. 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/TCAJI2553635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c05acb70babf804d839360b16ced8c0dd81ed17f0e1b5db25935f8535b3e435. 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/TCAJI2553648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9102ba9c45b01bd0755a374c6e35e4d956e1e98d379e09f124b5a4875381da3e. 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/TCAJI2553676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70376a017bd4b507dddee7b39372f5fd058b214ed5472a0eab8f38c4fd347dc4. 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/TCAJI2553761.