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 0xd338d8d6ae60cc8ac111cdd078ef724ede8ae7bd685bb998742237e9b5ed02b8. 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/f9a82c6c-c28c-4fce-86bb-ac89c16a4a24.json and https://artists.proofprofile.net/proofs/artist/f9a82c6c-c28c-4fce-86bb-ac89c16a4a24.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 0x2dceca1eb94de5f9a634badc401297b00f1e7e1d1c9be7c2019bd38c9d7c3141. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZWDE2395303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d88a4af868ab5e5d0ea8d7002f8d154dfaa03d1c52260245932261b512d04d8. 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/QZNJX2265608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6388368ecec90eac8026de2f3cc3138e8fe2ef0cda770d372770c78304fe5ff1. 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/GX53U2033829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4504f119afce2ea3a5056e07ad2dad1a215377e71451aaf167d1f393a92ee. 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/QZWDE2432747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc6ec7d0b695611e2682a3a337bd35b7b68d53e88f0455b8ff52f41f333d83. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWDE2432753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceea750a1170566d580a0f6a5143c1c3a5a6e6bc7771378ac3ce4615dd78205. 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/QZWDE2432770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ac3727d9af5fa62dea0b883a6e6aaa153b6dcda5c27706e53f8ecfdc46a75c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWDE2432786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd1bdb54e355d40acc54df7efe11ae6371ae68774c57ca38ff6ffe141dd505b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWDE2432788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25bf6f67df9813ff81f78970f25f5351138e470cd76debbf89d3aaa2dc9794. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZWDE2432790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc76e3efe732d77e574f53a3301d6237152ea232a3fe90c957f24ea8326003af. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZWDE2432798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ed9d9eb2a88fc0c0063234f93030a2c440dd27969391ccce7a985557662c43. 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/QZWDE2432819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81960aa34c0110e3970772a6d32d0911b9f8813f7b256f254a757003ee985bd4. 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/QZWDE2432833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0e469f8545447f23d6660a5194604a861f8a183f5f79b9d233af5ebfc5603. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZWDE2432849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5547f016ba7a74866218ed5dd6bfbf1bbb3aea4191012322865dfdf1334d27b5. 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/QZWDE2432854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d97718af7f1e38c40b4e46fa3f954e39dbe39ff38c44ed663f503ebaf1ff67c. 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/QZWDE2432867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa415d3091a0d668d21393b7b7484f8caa53417949bc6d12a3dc3e7b085b44. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWDE2432887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c01d16f98e623db2a816fb26539a3f3270c444d68769c7bb3e1b99246ed67d5. 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/QZWDE2432895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7766a065a1a1412731b458f19f340d77b36180a659072c1281fa40cddf13759. 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/QZTRX2496587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737f97dac972f1e6a3521aa7207efb42c5ede6f808d51738c3c345a1c35ba0c6. 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/BCY0C2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f160b996ecfe0d93c5ba5f0cc69565e9a55d6d21b2ab013933edcf0355ada96. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZWDD2379952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c34b9c0fb6868fe37e201fd04c466676e4e21f674677e861c4e33ed6384b54. 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/QZZ8A2424189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48826cbd6cf9d3acde6f41d8dabe5bd743eae388578525c919322a12516a21b. 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/QZZ8A2424196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf671def8d4d09ed6d7a0a9f5988a98c8c4aae2dc40df34ed587ec89b242d1917. 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/QZZ8A2424199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96e3ed1fc296dadce4e6f6ed9d7627afab5d2cef4b27b2e31f69e2f9fd5a36c. 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/QZZ8A2424203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90cdf62b3387820ef3bbbe77cee029586e7cd95e9ccb8f4ccdfc2aaa9046b46. 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/QZZ8A2424208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86f2a4859bdd40a126810ad274301b058ccc382ba59995faa953693e5631a7. 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/QZWDD2445647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d9af88b1488d8ad7130d5ee55821dedae915784d6eacdc7c568863decb018. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ8A2424212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab87c3b86ff89fd78cb62f66887e789c1e8c6cfbb5143e6d8dba8af4fc61733. 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/QZZ8A2424214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5847acbbe1578c487999e236184cff5f73c71aadd2a45424ae897e2098e585. 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/QZZ8A2424216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f2c956b07f43cc3278e1d18879feaba468cc77a0a2eb24000dd2ce07cc1442. 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/GBWUL2485876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcb99c2bb1c4dc8bd93ad29c34c03066dd8a5f8b6206d14f382c8ae3ec6d4e0. 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/QZZ8A2424223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55b5f369acd6b3d80b1311d8cb5b24d6bd1c8c40bb3ee69d68ad92fc8ced80. 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/QZWV32473290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6709387d7991852e5a12b7ae2d97af004d80ee0edff56495690e1df8751b26d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWV32455975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ce75d1d03dc3c17b1bb490bd10f9c39ee6dc65186ee040c03cfb41774fc41b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZEC2301571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae748def49d322eff078f429914cbb29708c713c2325480cfb67245e9ae490b. 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/QZHZ52146933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9bc8465edcb5f1da69be51246dd1104d30ed9f0d184e13d4832f08e7fecfd. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZHZ52146932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27094773ad2326602cadef55bab308c43ccb9d409961132f58fda640221315c0. 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/GBWUL2312613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9936ca37db2f57415aefd91b73b0793a0d84625382349e6b79dd2ca17a94bb4b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBWUL2312702.