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 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 0x253c617028522f2dffd5ba2b51c6703ebbc6f74e324356f859def4034a895c59. 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/56477469-e2e0-4b91-9090-e26c517995a0.json and https://artists.proofprofile.net/proofs/artist/56477469-e2e0-4b91-9090-e26c517995a0.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 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 0x5b3cc5a7f7833e788db690a0b0fc8f60d14cb4b8ef4eeafa7bedae4ccb57fd09. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USL4R1903045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822450b9260e38cbb99be0e4e43a8a2f09a2f6bbe27e3fef70b0efbe9864c8c2. 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/USL4R1903049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b25232217aa82eaea2abafcb0542d5fc38c863a2fb3fa74a92485d1223ea7. 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/USL4Q1900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa868873b4595218a43124f2fa79174c3ad1e2177d4f8ba6b719b6b62d1c2dd6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4Q1900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa004654760a2460e0414e4890df9951da9779b2abc251bb9c45e29809d4c03cc. 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/USL4Q1900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c0828cd024354340df3869517b2c8cfad66a504e1209216595566dfb36b6ba. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q1900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974576264c8a6a1fac35f5d6ac417f75eb3992fefb4445aaf8428dc13162be4e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USHM81978700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84ec940b04d1564b7a63443467d03a37911d0f4d9c6c5abf63803a301908e94. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USHM81978701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58078b2de04370513166f7593aa8018c6298af18b82017f54184fd51270e5437. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM81978703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40537736c3d618dd713a20c7dee0a8e68ee6e484e1543cafd37a9762af751c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USHM81978704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52be03b56441a3594788188f1533fd2dec2e578afc184b94e5c0753250add0. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USHM81978708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f62a4f0dd7d3d2ef115ff0dd4d85104ebc170f6d58eeb0f894095598643c269. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USHM81978709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3418bd3d60a3971771016a92e61be751ca457f9d21854bc18d4b4652e36979. 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/USHM81930680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef4fca2f8c4f7364582afc31d6789abcd00b3b4f531a8cb80b28a2362255704. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM81930684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c284b9cb4cd8f9e51a5c5d279ee483864975136eb43d3f8537c1b1182d1e73. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM81930685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449626a3c7c745f8d90eaab9af2f7e46e977adeb9e99eb5b760488ebeaeec890. 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/USHM81930686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c0fd03b2ba34d64ccdbf2cceddbdeadcf5b90f266c6099a0476dc5567c7840. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USHM81930687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b98d733db34d4a04c9c7a59d3a4d285ccdbf0c603888d8f54adf60e30fdaa. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USHM81930688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0a35e9e0b8879582becae41cea977cafd03e9c5cd13a12d0cbfbb2148278b. 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/USHM81930690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb39b2e8e918e33ad564dca85c32468be0a2d9c19e0b752e1b54b43af36a2ed. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USDY41973938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e97567c2742e8ec76efeaf5a3815fdc806801889219ac4d76a5c0248f0a1fcc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USDY41973939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dee2a01f08e9de2b6bf27625bda6f9ec16ecbb783285ad0334bef7d28c1bad3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USDY41973940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6317d1db1e6110dd683f0008cbc1d7cf5592a1e50cb69dcc1bd4b042c1e4e909. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USDY41973944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a68d10f9d1655b44a9b4943b2629a057f9e757cfac79fbc4aa1661dd371434c. 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/USL4Q2067063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff4b02c495fb038335b88c2f4e9692a5ab16b5369101bf316f717e3819624f8. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAGA2265490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deeb5a4ac8d9a85640a593440f18cd22215ebce6c1a5da7a2d6e3283a990c94. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAGA2265494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c5833b8983a449e44a63876d0838bfb631840bf12c3e10ddc3f6c466b7ebc. 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/TCAGA2265512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67999639e195bb05d9b5b395ac4439b78c410a9e1e8418f14d105045bf4498c1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAGA2265523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f1449624e29bb0cbefe58a6f64a3741a047d899f3f6f03f0a8c736f9127f02. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGA2265539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2017bef9a40608a912fb5303969efb12dc0d69b2c1fcb83ae96a10ab17441fa. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAGA2265565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edeb8657f52c3a46cb2a040da9e5869bb29771d95bdbd981eade4b4e6758952. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAGA2265833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4983312bb770e529086f7fce33dab70ee829984ab118dfa2f76c34332f6bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGA2265858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb9c66f31356663864ba9b32cf9753be66df765d7b5770de37bf504b68dc4b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAGA2265860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa7470880df1be575af5cf801bc545a06b55c268b9ca8e63e82d211bef7402. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAGA2265869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f23a05ea029cf7dfdd49709fa7e6e074bfe0207b97bbf5229065d145b51304. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAGC2224265.