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 0x7bcabadfa476e5a9fea50bf67c43a207c2c6b03c43b691a99463b948953c0d9f. 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/18d6cd94-63a7-42a8-829b-ad145077b5db.json and https://artists.proofprofile.net/proofs/artist/18d6cd94-63a7-42a8-829b-ad145077b5db.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 0x141529ebc200f699176c1d3726b4599c0634912b2fffe0254e2cfc48bdb81f74. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTBF2321998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d3a8003a664af5e64317c40e05b191bc603f8ff80fb05406a5949480975f5. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZTBF2322001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fa4ce56fc4f97dd7ce15ce267c78d7eca14bc2f25591ed1f158174ebccf767. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBF2322004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb55d6d5b7277a877a9b2effc12ded0811eb8826424226a0c24dd68952214de. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:29:11Z), 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/QZTBF2322005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf910d7a3fb9cc03f00f14d2b0cf0ef3caf8293c262013445bbfadebe6226b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:19Z), 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/QZTBF2322006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c40a1349fdbbd7512c8e9904d9f326884967495812d5ce3522b5159e9dd47. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:10:51Z), 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/QZTBF2322008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2065eb545c457499472fc1e33651c4d32d4625f512011dd8dc5bf43a987ac42a. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:08:34Z), 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/QZTBF2322010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac5d394c5441b15a6024c1167fe3669f1dbc3b05ada62371adef971028280f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:05:17Z), 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/QZTBF2322012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda70b7a4d38116a536159aeeb5ff08bb50b028f954b1d20fef6a36fe3281c68d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBF2322013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dc65a77e56886e500cd8bbcb78489b3f2bc453f24433c7a30dcba6726783fa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTBF2322014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96475cfee2d79aac36eb5679eba9436a6092f024fcab63d39192a0729962c359. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBF2322015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e47f5254ca36ab3b88646873203514947145986df8dec8635f56edb45dd7a8e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTBF2322017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0146d27a2c838c87e0440ff52e7463a57f62cb33431fdd2564452814359098. 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/QZTBF2322018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b44a7a9dae993c85cac32f81b563f5daa0a8816a2f9ffd209783444d3a14db. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBF2322020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2534d95a9c9b235a4583346c809b9a5a11d67d36a9050ddfebf4bbe85e2f7d3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZTBF2322022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e027c7b08be23a67f7d8cc91f79a64346a50d4ba2a07b0ba5b08a93d52505. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBF2322023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5dd1fa69c8210499007785a1ec4ed33f1900fc5a084287717710e0c8decbc6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZTBF2322024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b791ab4a8d38d18a4329634ee4008a21c86ab8b877e75481f41b8f09ecb78. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBF2322025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ccb24d39531afb69d872049e15a4442b920f42723f0f56904fa5c0029e9b6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:48Z), 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/QZTBF2322028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586ad40cccf9aae1f331ba3748851a56d46dc06731d9ca68d09c1ae90e9d0839. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBF2322029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08618236622704501c09b217730b8e7a5a4e40c73d5eaef65eea8ba12b6db3a2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTBF2322030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a5f00502e313eff85d389f97dda9a2243ceead5b4b18cfb1074a2fa01568a6. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:27Z), 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/QZTBF2322032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaac285818d5a18d13e84c5deaedc292f7a16416fa7ffe28b1f0d7fb81147ca3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA62471607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6f7cc8b26b383b2cd743014d5986c0e932537b78775aca8ccb0ba7fba66a0b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZDA62471618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798fd8c1941428f9fd6e11512c33dd5d694109ace314cfa9589af88dcd8d6dc0. 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/QZDA62471620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59106f971707fb837ccff5f2bdbac9c773df7cbd2374902958822e958db42d0b. 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/QZDA62471627.