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 0xcbe15754bf6c55763e55d1b75f72630ee0bfac2af19289968ee52c7788904325. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b206a6af-6700-4f8d-bddf-664ef48e444a.json and https://artists.proofprofile.net/proofs/artist/b206a6af-6700-4f8d-bddf-664ef48e444a.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 0x5689f15ee26d13624303abc4b92df87281ebba7d6d7d6509688dfff7566e58d9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZK6P2457652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f96648fbab9624cf4973343c38bcd7ec927b4d5c26be632a52597dac9269d71. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFR2446028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e2394f2709e11b4b48ce5de05c117fa8aa81bdc8c1671dde8e04498679f3c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFU2416793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f362dfff8e04aa4528cf3e3696572b58fe84e75fbe808c3feb749014621b16. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFYX2589420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc6ceff28c5e0f3148f1c49c99cf668f6850b5fe5fd04bb718f8789c7382e20. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ62561677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2215ca528c502b4b767a4aa57a6485c79b3057cab16e5206bf6049206b0df3b2. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZDA42589036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a38e7bd9989221d3e2ccba3876ce261a7946953e6cd1158c9fd4ee8e7fede14. 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/QZDA72509705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbd831b5b5c5ce42f32c683b312aeff2ad5a1bb387a860b42ce6529ad3cf293. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN52573357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9113e6c82d243d26591ea5bb677f1ec0608e5edc00eddd114d63a065b45571a1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZK6G2575758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224bc207d2f69354ad66687a19db8969cf08ca3437d76dc505f500e3e31c4fd6. 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/QZTAT2587327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a9353fb442175fd0d2b988a9867584c357e361304ec5ac240246d0163dab93. 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/QZTBC2512048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3010b1814df29c01cfd2a5635f722afe59e8ba96bbfc37d190a87ab1aa272fa3. 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/QZTBC2542825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682d453e6d8c26aeb4bc034e6b30802ec0c1d27d5f14d1127a0e1a2aa0a23396. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFJ2587182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f662788bd77d5f07e640696e42df4259d404efb8256c6d745bad55c6119a91. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFR2591037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b63e353be8440d81035c88976f02abe34ee1bd33db593689e13e1deacc521. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7N2550535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36eefd5bff3d08373f7d53c31934c989faab7a6510908bc738d6bace2c1e03f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7Q2591375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1dff4bd3b0c1bd03fdfc2c2f5365f5747b40511152ffb2292a532985323e5. 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/QT3F82551111.