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 0xd82b5b2cadac2a91bb21d0f43c1f1ac514e3bf798228ea3ca769d8df52beb099. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fe3243a-1923-4289-a89d-55a6f58ae4a6.json and https://artists.proofprofile.net/proofs/artist/7fe3243a-1923-4289-a89d-55a6f58ae4a6.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 0x9d863d4633a7c38d1e145ccaafb3b95f5bf3f37ac339de072bf5bda09f6b79b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5FN1871487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd6976c52cfa590ae6cc3361a925ce6cd348491ee237b62bb886bd7e4d4092f. 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/QZ5FN1871492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf9fbb91f1c829bf9decfd24900cd325178cf69f7357d5172b5e5f968ead1d8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:43Z), 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/QZ5FN1871494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e863b96fe377c5b157e4d29efdb2c729dd3b1397502f367843b99a9cf91c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5FN1871498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5ce86832ce633961d8143b51a282e26f85c7dd665820738c9775e15dacbbc. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZ5FN1871499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b290b00913f0398a2e21a11d91956803b289ea3ea20e10975db6d33842db10. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USDHM1619821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0340924897baf456d7d23cc769c198686a86ba794f47b76dfd782ca49bd217fe. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USDHM1619825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d73707e67ba42b78872c8cdadc8d9b485a6d5275b898e998b43fb520ba513a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:04:32Z), 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/USDHM1703402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a721fd134b632aae6f30359e0e84f82671d86b34290607e964dbcc6b212ae8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDHM1703405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40438b9b4bab54b24acf6ae5ec1d92fdc15889bf886a0d3f5022a8a8891f081d. 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/USDHM1703408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68ec8a7f8a82d362a01b6d6dd3be7f109a66bd46d3efd1aac3ef28543360e3. 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/USDHM1703409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f407ae16b6a953b8746cb840d15bbb4dc00d9b8d2249d013b567a9f7f6112e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USDHM1531543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2c4dfecefd820808075b5bf5de7a9c0a71d1a4268580f1d0a738dda015a0d4. 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/USDHM1531544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830f839526e92a58015a8ca8091251007dca9b957d0d04d6cd099cd884976db. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:07Z), 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/USDHM1531545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3434ad917666968d7a3130fc091c55147709060011ff621d12d6cd29cc761bae. 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/USDHM1531550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe6cbc96fc8773869bc4e7aaff1431f8c355dbccbb849f2d31a3cdb13e2f8e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5FN1903823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4414f0fe5196cd0a06be8fdaab562ba6f95fa9082cdc822214b3dc7271daf3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ5FN1903828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b252a9461302efe88b93719e6648c94990089131def4e0e357b986b4f067fbc. 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/QZ5FN1903836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c30a8a519e907cf51270a5e65f12ea5e473f7fb3682c4e42813e788efe8a3b8. 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/QZ5FN1903841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3dca974caaf089f2cd2b766f39a3674ff354faa7f23201773bb635644d36fe. 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/USDHM1627923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb89bccadc39eb1be5abf737868a0f6f1f77a2c237b43747cfff8ae9a337159. 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/USDHM1627924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a420643859fe0291044c9cd11cccd90f8604cc44ef82e0915e26c13fcd11418. 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/USDHM1627925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67be908dd38090c877c76a4320b70a768f1dfd67904c67911b82f066202b5fa. 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/USDHM1627929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8296c140ab070dc23dd26b897fdf35bcbe95005b3f27a430622fb52dddc803. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USDHM1627930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e29c656fdbc010fb50e3d029bf0855b1ca3a3eca500f58999900f86afe407. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USDHM1627926.
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 0xcd591dc1d333d4209fb6a83fcd51b5235ad8c275179f8401025ea1466a568b95. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDHM1627927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac91dfa44fb132887d48940ddf1bb0765a09703d73e2dea44144f9051e3876e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USDHM1627928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eb2e9b1cdd291dad66ec3c79665d3a30c7078b99c9b65715488a65741f8153. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USDHM1627931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043fbe14cf9cf66d3f62146b515bf95113b64f36d9bffa1eb0d5faf627784c21. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USDHM1627932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7b2e937d18ff44b4262a7e58a84ff2d3835a4edee8b41531e2386d7a410813. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/USLZJ2127399.