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 0x3878b3001bdcb8848fbb02d179b10b647937c6e951f71c9ac99f6cbdce4b1e21. 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/bb7d8b3a-e0ac-4179-b41a-e5a22156d55d.json and https://artists.proofprofile.net/proofs/artist/bb7d8b3a-e0ac-4179-b41a-e5a22156d55d.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 0x51ede19c26f51ba2df1a4146923d1f245823b6ecc3a00a2a852ad9789e536875. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZDA62130227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dff0dd0c701c7336e20c90432ef7f5afe42a7a8da3150197ef32c3e451f051. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZZOPM2112962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2758bf0b584b8589cf962ec0fdac6f8c3544203783bf451d862e26c6a43f46. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US39N2306065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f54024627389235d094946a633e106bd0ba56a7ba34bf1b3dadc6bc4681ca55. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US38Y2308729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7de89e126e2f6b2ea3ca80ced4cfbba3fd9ebe41fe232cfbd06559bfbd41c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US38Y2405996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2bca360d4547646806b094920fea343c3e549ea18fb2285feda9d3388ba24. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US38Y2415550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34f01324625db25985c2cde32b4b45b197f9900a2e7d8b035e71b1a5241e20d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/US38Y2419869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3428d90b025e0cf0eda3cbd93909c56d3f06254ab790f0223a3a1f11b9f6ea1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US38Y2425271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874da775c5be7c3f4a36433d4ad3db80190216075f6874fc781b832a2ac9f969. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US38Y2426080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671d7b3a7033b831f606ae680c55709f9b3d98512aef17564a4b9ef55bc2496e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US38Y2427194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34f01324625db25985c2cde32b4b45b197f9900a2e7d8b035e71b1a5241e20d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US38Y2419869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3428d90b025e0cf0eda3cbd93909c56d3f06254ab790f0223a3a1f11b9f6ea1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US38Y2425271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c92d9f7c9d76f97d0f9bdda75103d63d6f900f8af23065bc87ae13a0d01be5. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/US38Y2427196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cad723500343b4d1553a22800346346a9e9226c467a975b5614bcf7cd92b725. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US38Y2427197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f4ca92efbe1a7bae22009e4590f70254c2be74cbd87d4255e3bb720590ff5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US38Y2427198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc5b6274ab3557662e542a70ca89057757f1f73c3933d14fbaebff7050e1f4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US38Y2427199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb86bde43b496f1c3970a5f9b3412870bb1f7100d6020503f5186eef2434146. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US38Y2410622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7de89e126e2f6b2ea3ca80ced4cfbba3fd9ebe41fe232cfbd06559bfbd41c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US38Y2405996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2758bf0b584b8589cf962ec0fdac6f8c3544203783bf451d862e26c6a43f46. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US39N2306065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646e3e129e273d51b2fcde0860f39d9c34afdc02e6757d014e6d489853be6be0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US38Y2534972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeaf31dc54830a289150c191ff694a32b2ad9f2bbb0c456525682a9ce59fa20. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US38Y2546312.