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 0x33af8bfb42ece81721ee08628cac458d9051b57f525efad81d918ab3a4f658aa. 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/240b8e59-4475-4bb3-ba99-19e14835a1f0.json and https://artists.proofprofile.net/proofs/artist/240b8e59-4475-4bb3-ba99-19e14835a1f0.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 0xb3e108b11f6c0255e65206f17c9f406a5c947024cffa7519506d58423728f61c. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZK6P1945980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73833d47f02721f1eea0b1de55d58d1c42875755081085cba2a845a51f675b8b. 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/QZDA72072143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045ea6863f52075c8adfa49299b3c8ad3dec7bfeb6ee78481df79699568403e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZDA72072144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b31a7d92bb2e7f52d143514b8458d029f46ed8d7d75c7395ae4c4063f4ab87. 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/QZDA72072148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d0c08bf5a54687b6cad02cecd5a94732fd284af5b879d17c15c383938c2e8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZHN52197982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375454edefd356febaefa97d47eb0f1d9808857a4b6ae885f1968c106075c1af. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZK6F2059669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec3da9b656b2da1ce23885ee114b4a012a089328dcc90ec38aac146e5eff0e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMER2109795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e64ec92beab019c20a3c5179c055d0a5c7ba2469f5a43ee4d928c5a2b8e281d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMER2109796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e67322258157aa62efda5fba17dd0a951a0edfd9a7ff8a8cfcbef3ecd2446e. 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/QZHN92388855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2b9ce3a8b842f882818a7f17dfc92a5c244e2e9c0216bb67cb04bf6aa78b3d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6G2358899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e23f4ee4d262734eb211c639d0f0da9ba536ac595dcf86564453c11694af6. 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/QZNWY2287327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e67322258157aa62efda5fba17dd0a951a0edfd9a7ff8a8cfcbef3ecd2446e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN92388855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58748fe905e6feaff5588d5625c99e825c84a381f10dee16b4d43dc3ccefb316. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZRP52312599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185f48146dc401f8d3cf9ed7a05c0ddb3fc4969e1c6835344514865d08d8b013. 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/QZWFH2323938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2451335cd8379c661b1f50eef607f762f58347715039754cc1bcd041fcc7d947. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ7L2499589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ac7da4d4d9dfaf9f7e3b21c97075dd2d3a90dee07fecafc64dbdf1534c5a0a. 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/QZZ7V2489289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c345ddda9aab89ddf1cdce609e51251f5952131fdbab73449657cb0043e7702. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHN72505901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80721e5e31d2186c522914ff8220800ab4a2572343359f5fc0e8990f5adb5cd2. 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/QZRP52521483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d60aae814fac33220f99881c0799354f90d7b34bdf7309073e0accbde3cde77. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZRP52521485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9932361d1beb6cd21499a28ed55e2d389580da7630e8ba667ead46a21128c56. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZRP52521486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309dd4725d5f691958d14394d09454df0d8e5bc4ba60bfd4ee4e933bfc6bac4f. 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/QZK6H2496465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82daaf2f144d44fc33b9966f01c4d299799942b18a54767a22bd7853e9a7717. 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/QZRP52521490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f596432b7e8ab39c0aa9f740d1e42be1c429c5c790657d92d27cd7d6887c17b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZRP52521491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec413a45c8d5e11e4e32f42a4e9ab4eed9fac0d2c49fadc29c9bc5efdd9966d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP52521492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20121c8c0edc238ad5843474a497ab22b2270c7d7494756a4ee1ff6ad1cffab. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZRP52528745.