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 0x39a6aeeb0db37b41eb8c4b3031e6922990382d7782bb3e5f548c40455bcb9ef4. 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/45362ebd-bfed-4d46-b3d4-e0a92e38b64b.json and https://artists.proofprofile.net/proofs/artist/45362ebd-bfed-4d46-b3d4-e0a92e38b64b.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 0xb92b5f3d4a759db2363a0d359a0862bebfe9f3a8aefdc0caa2c9683e41807cc4. 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/NL6VJ2203796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a962d07e8c08a7835c017cf1b7cef301d42686ef74898372d09e126d116b250. 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/NL6VJ2203803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec7292ffcb7381b335a30600251b556501127d2cbb403cad705ea751bbd059a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NL6VJ2203795.
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 0x32e42838194b6f3ec2ef8fd29cc5497ce8b4dadeb334f38a91aa2f7e54984fbe. 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/NLGM12118500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83555dad86a5598604711ca644e3f47cede9e3e2f03dd2518b392d0a4c84d89. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLGM12118502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c1ea831978b0bf5ea35da523cd8e453583514ff784b1ce43bb3d0739f52f1e. 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/NLGM12118504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e7e506dc12e8fd5f246d1971da84c49c05a80f6c342b53422fd4cff92474b4. 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/NLGM12118506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba44910bd94dde7e7a8bd8be880087509847f51eaa21c7e3cb0d2f4fab1e9b. 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/NLGM12118507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5dfe93a56fb1eb0c04cbb4d19f7bd40bba17a6bb508e8f2eeb2634e3ef2ce. 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/NLGM12118509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326cb28737534dc42fff8bd802ae70d5d8d0e9754bbbbb4caee5810595f5c20. 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/NLGM12118510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643907a15f006e08c1f5ef844df4249ac85c88673e60f92e7d72974f31b0451e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:08:01Z), 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/NLGM12118503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc501640b30d0cbbe1c4c3daaaacb0906541942ffeb2cb8aed2095cc5fe72fe79. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLGM12118501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95778c2654f8267b9ad22b937c5dddd32918500ead6562f37ab4c2de685b5476. 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/NLGM12118505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bea38519aa01ef67c9ebd877349a2b9eddecbe28899dbb805f55ebdbd21766. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLGM12118508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e70ff6145695ad9fb803b7e33bd4a8954ee2ec4b5893fd0be3cb206365e47. 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/NLGM12118511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35080564ad712cd450260c88fdc675d0bef564fdc97bbc7d24e1709ccaeae236. 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/NLGM12114721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658614477ed7033da988a15333e35ef2ecec5a447879807893e0830285368045. 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/NLGM12017892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6f2119b2fc1f27e6f4caa3a5cb21bac0515c9a2af1da6ca5a9ab6d6e41735f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLGM12017882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0556592844abdb6b84d9f43230cd971910a4c0c775a80c74f988426bcb1e5db. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLGM12017883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fdcefcbafa9bd96514f96c4833228216e2ce7173baddc0ab75dcbc38cad952. 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/NLGM12017885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b6e11a2d1c831a73da6c6f2faecdbf931488c38d625100dd36d9738a33cfe6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLGM12017886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f1d571d82fa2135ec7e6762a115f66e3b66ee506789ca9ab0d608988e7b1bc. 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/NLGM12017887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06475944b1b3cf7d197efb3b92365579b5c46f096a1d5c8ec12f423772742dda. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLGM12017889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f969ff359000cd2181fdd963775d2f6399bf9d42a3eddb7467910d760c2586. 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/NLGM11926160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd72d123c7b6491c2a680a390f691bdfdeaf3a35a61e7039622083e25ebfb89. 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/NLGM11926162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbac66b502b76e40e24e4fdd30be52fca0e28d8188fd35f621aff8a6b6ffd116. 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/NLGM11926164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31859ccf347f774691a7bef62363672d740d74186edb0d6cc13adf6ff3fc5b0. 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/NLGM11926170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1a363def0a55732c8ec3c9f193f1d6c66cd162347f15ff5c2b7ee8654b08a8. 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/NLGM11911140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba4fc7c79fcc9120472d465dc93c4f2e5f4c6ccbf843a75785d0160fd48010e. 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/NLGM11924529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fb21ebb2bdc588e4d4be4e1031298f5d8a7a674c863271da215b33a8ed987e. 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/NLGM11811530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d921a0a02f0247a47d7db66f4176658f1bd8cde43edb886d8fbf56f551528. 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/NLGM11811533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce927cb3d7079d112f0fc0e1e0590caf1db0588f859254f8610917530dfc501. 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/NLGM11811535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10985e0bbe4b2dc7eb3306f1875ad6d2bafb3b4f2e039c250ac865d7fb07459f. 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/NLGM11811846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1142a27296edd548a944189052d66dedbe7f7256c6552662823370cefdb0dd00. 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/NLGM11811843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd9742c8c396293c16211f879a260a9e01f8a4ac8524e277110bf9945d95605. 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/NLGM11811847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514195b9c677ee23f74f1845232b5c243e34786904a761aeaabe82ae0cbdd48. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLGM11811842.