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 0xc68863bfea7893ef52dcfd9bbc8ff9c8c29efac2331de8bc0c7711576a8ad934. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f31d3fbd-5f39-4c8d-b52d-2ff91c470069.json and https://artists.proofprofile.net/proofs/artist/f31d3fbd-5f39-4c8d-b52d-2ff91c470069.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 0xd53573dd940aa18f66005c9bb78836037ce7e223b4815958f3b43fa0190e799f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T12:03:39Z), 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/QZFYZ2256607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2340caf7a464391a2f18f93afcbb939210c070ae1f0ecebff5725469d4e9a3db. 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/QZHNB2246401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf825f8114302496f8401c84249c4f0b212bd64122bfd89a22d31f8109439c1a1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:47Z), 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/QZRP42266289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ee0d2bd0cafc36f0027511521a2a321b709f8f53d12f68f5f163599dd7a1cb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:58:22Z), 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/QZFYY2300953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eed747d4f8d3e30b5d3bc1e8f6553d7fcaff70f3634e3c3ac8e2f4596f5ddd3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM7282391578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f7e71f7d8d645d960afcc050b5e7e9c9c72e9af990a206ff81b0bc26af02fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2432806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72311ecd9224bba832789569b69f7beecb51078c72f2e136bcf672bee5c78822. 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/QM6MZ2441182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c79c2ee25f46038e2224103411584815d6386a6d11b07c3ce1ed6cce7e9a472. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:40:09Z), 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/QM4TX2458042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c5aaf0156da08e63e9a19fe2d9cff7fcc6c3ba1ec039d901ce8721afb14958. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:23:39Z), 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/QM6N22458101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19477007c209ccea635df2f7cfb8eefe1ba61be9c4c55a8273952d47df816dc5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:20Z), 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/QM7282431947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b29939c67adbe4611a1f12f450d97681cc260c59f3a073f7958ebb795c05fd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMDA72417010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e45ca7143fe8637d422caf0a3c7459d6d7b9332486eafcdddef0f084769988. 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/QM4TW2555051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e2d8a50ab1ae79c00464faa91f924a926974ae7c4cc0310e8db92d1689cf15. 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/QM4TX2596490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a29e0e77643c725c836154301fce4d39b47b95ae9735e7407003debaff073a. 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/QM6N22593123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e9fc4d030cee2eb434d86ac58d4bc85108d299ea0caa47490c482ede658e9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:31:54Z), 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/QMBZ92501828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93819a44e109b58731f7f505c64aace54ad2f984ca01a6f040f957126433f632. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:08:55Z), 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/QMDA62511412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14139998c8370407a67fdc60bbbcc881625f66d81ffe2b5c4735d79e69f4b3bd. 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/QMDA72563553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3505099fd8f9e6fabfed752b69ce622bde5b445438826e49cbf5806e277ea9a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QMFMF2519539.