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 0x8dcb6da22ef2cfb77a062a2538b1341b3c873342711c0f38fe027e8bac025b47. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55ca3494-fc81-432c-9938-324236a86b0d.json and https://artists.proofprofile.net/proofs/artist/55ca3494-fc81-432c-9938-324236a86b0d.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 0x4bbcbeabec9f113902863ef7970fa0f6ccf983223d4c80fb576b69e6084fda75. 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/FR59R2166273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea239a669ef931ac4351c0a00d13d07ffc22534ca2d5ec995cc26c85d94afddc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2166274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb655117533419589a241d9d61b0a6753b56fb445aec39d254fe8048dc1dc3c. 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/FR59R2166276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d2f7fe63d6b201e4dbc31a877b2e5ce21211e5c772b24cd760bc4fca25d195. 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/FR59R2166278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884a04e4f6946f59aa5b1aedea8ade20a197d221873a302f5c45e38b566187d3. 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/FR59R2166283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1297dcb14ed596e6ec5d6b2653e5ab9c0cd941ce015202d8afc4aeb6e7e5fcb5. 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/FR59R2166284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1c504cc88b258b82275abc15a409a869c144175bda7c950bbda155e2dc2c3e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR59R2166275.
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 0x341e2e5eee4426e72263accd11d29ceffe9654a3e7aaa54a79d84b1c7971fc35. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR59R2166279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a6073ababb232fef2ab78918bb6765b244caecf2974736c695d60b8af219d4. 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/FR59R2166280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8067d5aadf506e61ffba713625d6f77dad4337b7237221cee3bb43debf19be. 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/FR59R2166281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd7c677841075ec019343cfdb9c1b1e98fa474183b7d2190539f3042e5d520e. 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/FR59R2166282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a35bc2e10b3f6c0e4d4a103f185f589c8260bb0950d6cfe6192382a81a8c65. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR59R2166285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eff60bb97b8de0edb5ccd2c276a9e1595e2402db27bf4d070a9977a16b0ef13. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR59R2166286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1129fa2e3672394aa7894f63c3482c8cf5eda34e4d35c10990d7b3d187b18c. 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/FR96X2267916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e85088509a18eafe050d88b0a491c63a7e52dd78ef0d0d2591cc366b157cb. 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/FR96X2267917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb4a7b16d7dbd3ad251ab2707301e8ac56ae836bb6c40b7c2014cc563609545. 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/FR96X2267923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4b938df23ab5690fb0f835e12123173c2a4e633863413e2f430fc27e6b84df. 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/FR96X2267924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2cabf2c5004636e3e7cc8ebe4dc989c52e2feab25eab536b5da9f4f1211686. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/FR96X2267925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0414468c8b8bed06b2c6656076a50d08355798927b4ac317991d1e04749a59d6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR96X2267915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5805142eac29fd5883b3f9939469e4853153db9456bc233beed734fd9df27e7. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FR96X2267918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f008df83055927659a1c9ad572ccc27d2064c0f004049b5432bdfd1e861f96. 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/FR96X2267919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b303e593f2216a05fbed8a0a632a85867298f73ed668da642db6a145630c7b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR96X2267920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9bb35108eb104d552dd0e0b1c209a17e429ee2fd8d106a17638a64ffe63d8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR96X2267921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef09f9f642460a9ea411acac1608e463f751ef27af7fa70b2bcca7011844e949. 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/FR96X2267922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42431735ba120d0c7d5efcc996f126cddeae7473dfdc10b57a4f56f5c299d868. 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/FR96X2264142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a565b162d5f779458223c240c9f295e86777484606dfc3bcf5bf2141345f84c. 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/FR96X2264144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773ac77f8b144595df83745612acd15d9ac11a534a03906cf762a611e795068. 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/FR96X2264146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f198bf6c9b14ce9a158daf9080a5fef4d3fe9b3a271869704edfd2f394612d9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR96X2264145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c7ca4349dbe8a0bac8668d3d6256b4e93ae967410dec98e753fdaa91058e89. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR96X2264148.