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 0xc947d6c2ab163657a378c6e07ba9b944a4bd2e56e21889ad231ce789e1339b8f. 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/3d70851c-4a99-49f5-a8b8-a1e097ec653d.json and https://artists.proofprofile.net/proofs/artist/3d70851c-4a99-49f5-a8b8-a1e097ec653d.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 0xe54182508ba2d946688d0cb7b9ef83c1f6d11b78f8dcbe1e290184f33630a040. 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/USDHM1799903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07090773138859786f93eec8d96b0cb61d8bbc21b277d3d47f88c6fdef21ffaa. 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/USDHM1799904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2542c3ddc24e382a9a6a58ccfd9a901aaad61a88ecaebd1ab7815bdb57449a36. 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/USDHM1799905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8359e87daab1ccc39495cccd9cd8cc71407e2aa65064b2f0ba59004e3d51c9f. 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/USDHM1799906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2cf22b1adae0c5da1fa7173c5fa6a88d26f184b7b59bce49949ffb6d69f8f. 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/USDHM1799910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82722b03cece2f09df82c1bb0eebc1fca403f91cf6094122efcc0aca93c1bae. 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/USDHM1799911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113f11f46eee9c2faaff050b053487fc9bb9dc3769ada6868fb2da802dc9bd3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USDHM2110582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b250d8cd41264015374c044dc1d7eb9c994d54d795f9b99e6f2bc0c5060eea. 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/USDHM2111333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d49524c50a5c768aed3662241a5743e8b3212335f8ccd357b4c5a96d1584b. 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/USDHM2111334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467cc5e60260501e90ee8124d58ab8ce9cecfa9b99a225873f373ab5935b3601. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USDHM2111335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c9e1849b9d0ede08cd287d7c065d2944ee79b9348bf416b9ad384d3204652a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USDHM2111336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51de541b644ae6b658bc18e3f1c4d0154eaba2ed7d3dda564d388992c7b805f. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/USDHM2111337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd97760d149f90174df1254401627eb3c1bf7cbb6f1e97fd1285dd3ded4baa62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1918946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc018d48c271484eea5410664b8557576af44aff8ae376e97ae2ae1353998ae. 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/USDHM2009458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf33b861c685eedc1a22d417079d5c8c03c5c9c1309452be7156a0e38c4bf9c0. 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/USDHM1807778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e8a3aea4c87940947750333b4062d5ebd2970ec380fe3421aa2f42dde7864c. 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/USDHM2022940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0852c98cc2150eb7006630d5e4fb984798d5232fdb420a57e0ea693bc18e7e. 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/USDHM2004251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823ab5599e75ea7346fd7cbbbff37aa45f70981bed74d40fe7fb21669952e08d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDHM1999812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988372ec5d10c7dbd14cd11a673c30607caba950e26931cb89ae6787f436042d. 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/USDHM1999808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de4009f3e4535ea1faa9a85ec05b60f0899420ff3c0ffbc7cd7582959e8b20a. 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/USDHM1999807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dfa9115ba80a03454818db97cbae732221317c215383b69ab36f21f1979584. 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/USDHM1999806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506fa2d28fed25d068f717c0e0b67e2ee88029da3d643289a2ebfb0a357339f. 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/USDHM1799915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942abdc727025e4d30e68842af0c4e9395afe8af2ec7a9c7d07ea8f6ce4054f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDHM1707750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee23e50b00f618b6b5a00200e21df0593a3626b955c532828b87b97b73d0e728. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1707751.