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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d2aaa33b23eb949e8d762163261e7b386528594616f59a00d9598fa7ad849. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c42c0600-0a34-4e2b-8f81-576c15e4e832.json and https://artists.proofprofile.net/proofs/artist/c42c0600-0a34-4e2b-8f81-576c15e4e832.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30ca0d4cdff081ae12355d0842922497a7191913ae2d9fad91943e2960b3617. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7281536868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599d903786009cee1fb2f84eb22b09c6f3453655d1e723fe3a2612e2ac528abe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7281536870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f81b08972b0317cd896310fb26b1ef5518fef9c26fcbfe1bbea78bdf0ce0b38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62da1c907af7bd1e63c406aa41598e198530da5ccc33ed27c04575bcbbd08dc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bf0f28f39c1eee9957e0ea2407d453bf25086dcdf8dc892670536030d8e350. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281536873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa486ce8d6b77bc985236508bb2e95c695bda274e1ae5e6e306737b010a07f272. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281536874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f44e7647b6dfcc687d359a99c1646f01e5fbbc42bd5ecd4e763e654bb13affb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281536875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d164f4b13e80293da0c66b8dcffcbdc17909bf349ac1dacca96e9bfee0d702. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536877.
L.A. Blues Authority Vol. Iv: Fit for a King
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099b162d6a26c8734107af48942dfbf8c9d0eccf76d2f33a0edb0b877b6fa22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM7281536661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecac06a261ba967bf27a073050d5fa0b18995aa5e905017bc25def62a87c3b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM7281536663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb524ad8358de8d2524e45b6fb9137c59a0fefae1d2572932765f7293556164d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46160f3e2f0f1d90b8456c9a670453a99f5af5a33d5090fe94ee96829da24f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822aa905cefb28a815d57dad486df58e7aa743b1060b2d11bffd0504a850397. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281536667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15de0b2da7f6ba49a601a38621f3086e0f8c595079921afc38b2e8545faceea3. 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/QM7281536668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fed7f24e750fd2767fa6d361c6c3fefa736fe21454963a712ce378ad5f31ee2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7281536669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f8856b14a63a2a9a06a23b7e1dd8e70e94ae3073cc06be60f5e39cc64c6a65. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QM7281537003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753b7001910b9d31b74f32f1ea7570b32a2f207f1c3caf320312d03899791fad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7281537006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591dd903920e435e8e4350d5e74c37bc0202731e213e39825a15e295e7d9fd09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM7281537008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e78ede2c208bff8aa8ffe97a8af40c523b43289be6648da4f9c67451795330b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM7281537009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a77f399cf6a5e95455010d8b74896a84e020c05490936556e2e40ccce92d13. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281537010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e34e32ec9859fc42dadec9f5e986ae23bf298e765e06068fa27590960be98. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7281537012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d4e8f70e9524012b2a0bf4ec8401e54384b72a64824d102e63df26cccd518. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cf45ac76fe5b9f7ab00865c16d9c202f15e0ea75f133a125a0c8c652059500. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281536476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9746fb6c23f338dec617200d6b41f00ac419791131ee7360b82dfa4a1769c3c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281536478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c05aad0eca4f47af1ee7e20cae9cd59fd710df9c043c7f214a3849fa31d68d5. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QM7281536469.
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 0xf6813d4752c7811d178ef796ac3fd86537518213a902b0cd38c7c18363d5fd15. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM7281536470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb1f00236b674ea93bfa8d526881f8c1f97b41b0e160f34a9bd007c0234ab56. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM7281536471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0adc66d0afe7d755724211855b8d7444875edd3cadbbc8b8ca310e3c31194f4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM7281536472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc881114310756a4ea0489c24c25fc2a48d24ad4c087209be04b3d2fad73f2ef2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM7281536474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15663dffeb828131841bc0c84c9cf3004a5d266f458016fce366c9d6c68e269a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QM7281536475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e154ddd4f977b3598bae4a45af8478b5d803ad52c2438fa302272ee373b64b3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM7281536477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffdf9768663d1155bedd9d53c1dddbc0b4e47e3eed0b17e70b38c138cd785cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7281536507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294bcd9b76625a95dd7a2811628148cfc87efcd22b9a9c227b4a7a0750f82fde. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US59U0410012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad51abd8dcaeeda5a3e5db1c891fa2e24601258a34367518bd2bf0528e13dd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US59U0410015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb5553f35c562eb44adb46a99af93b364c476a629995747e9117b9b8bf951b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US59U0410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63823e3fd73a0c37005e4de3ac0303f549266fe13daca512a84a6928e2bcde91. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM80490699.