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 0x9d069c1d57d695ed68da9fbb1e337c44a81bb256f95dff9487ac362bbfd4a45b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd2210bc-da5b-4ce1-b31b-81b299ab4848.json and https://artists.proofprofile.net/proofs/artist/bd2210bc-da5b-4ce1-b31b-81b299ab4848.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 0x696268f28d4b678055b5ca40dc237f97298f2f2aac7e5345bdeac75c874e4316. 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/FRX762213847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cc058a15bdbea5993a28925ad478aeea61e2ef9409f3474c2e833a935e50a0. 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/FRX762214373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d7874b4afd077e9c1831240b91341d21246ee2d244be0b9a8592b461f8654a. 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/FRX762214367.
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 0xa1710dd275a7061baac7cd07ea28a9171171531cbe2a5097c19f48a5800f1f1e. 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/FRX762214294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b2d68a21d36c0ca96a5ccff5d40f1721622a3fd416db19fda0c8afe68699e4. 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/FRX762214337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87a5a0fde046aab9cd6590b9e5c5ed2dd5493da5a751293de9cd2651a4acbbd. 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/FRX762214338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3220efec3b853c9b10dbabc9a6bac484804d99614a013b5771ea066ecea9276. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762213874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f9926d4c55df80170cb064aaad4c49aa4915f767ed1b85254ef4812ad77d5e. 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/FRX762214352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbe442628e78d15d934d2b5b9d090b0633894949e24085b4e4310dec298eaba. 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/FRX762214357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f55833a177fb34139bda236eaee2c215589480ee58a6cfcc069e903cdb29526. 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/FRX762219068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f868839e2b27852e7420fcb685e77e77c06b49a69a541b2b17e9211222614e. 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/FRX762219070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2706ce5409e877aa24d648976db441872adb2aaa38e3a8fbd2f86e8b4a3da6ed. 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/FRX762219071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706c4925477ae592ece3bf8c04d9e0cabb108035b1099182e8c1b03e6a17c50. 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/FRX762219072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a223a70d457d9c9be55117f3983b8156e909ec2b4a888d45ee6df617698fc0d. 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/FRX762219073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fd18613df2fddf4dae35b2935c5a6b15039d6fb71fd2768780bc8760b0dcd6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX762219066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dcbf29c17bd78673156ae884abf4169f0de08939387f2a1bd235c122ee1b83. 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/FRX762219067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f26d18fead3b4ac80ce74c75981cc64204cba83f8165468b2d0ab7560992a0. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/FRX762219069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83f0de6ec43eebb43af6bd5e7ede3d04af3bf69a7cdeb9472ba86bd0ca11ec0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX762219074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f9ad2899f6f0eb962036d0437757fd62459ecf1e59131be373742a546bfad0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRX762219076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df3f91ec900595b1a2ae4496e2516df7a007493f40b6d016896938408dacf0c. 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/FRX762219086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b68033c91302221775f003967471c8bd2090863ddc388f8e7f9e123ef172d41. 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/FRX762219080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9fc482745bd2ee18b4c0afaab59fc25ea1ca8328160e7a54b02a1b8fde8724. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762219272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1664690f563167bf4d176633143ee2cfd01baf1b67781671af2327b6a64968b6. 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/FRX762219214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54f32430458d89e45faa9b24077144f1cfa0ce734fd52bb3de14bdfdf00a6b8. 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/FRX762219106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef1f1e37c53ff36b435ee23053489d9d3044badaecee7ed4bf5629adfa8b43. 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/FRX762219107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae17c69e654e9d38692b40238774d9ddb89ec18929efb6d40761913d4c22b27. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/FRX762219118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac098857caeaa743f4f34e567fb55a2a7f327965a67c37c39c56a4f51dbeb5e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX762219113.