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 0x20cc68c58a9363e6606e32b797000fbc90531402fa49097cc027732cd9abb26f. 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/c81c305a-6df7-425d-965c-655bdfc585e1.json and https://artists.proofprofile.net/proofs/artist/c81c305a-6df7-425d-965c-655bdfc585e1.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 0x822cec0ecebbffd959d1671a254604cf45cba4df095a381620f85c3bebd53e52. 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/QZK6Q1957110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7fff4f8ba1f9e3168b926888613b03072e923652190ed1f49b974e76064def. 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/QZFYX2065343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dfc1315aa9ea0c82366186bdea9f30822a6a4cae268c3f60876d3471045284. 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/QZFYX2065348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba78394a6e497bec592b3f5d68719463d8b3c4f80d11aedfebea6fbd1eecf0. 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/QZFYX2065350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd79fd001a48e733abe28a77b55f02adaed5158dd041cbaa83da53b1b232da. 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/USDY41775250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570f2cbc67007a4e4d9367ef935e9843a603859fbae1d6a0731acc434111a2f7. 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/USDY41775251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd18577d03d8af8162e2e958b450ca7e0ef98d03166975d6fa6ec0ba08346717. 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/USDY41775252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f193a5740118ea692bdffdb28cfa3388570de56e7a93008033bed5a5c13c3d6. 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/USDY41775253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c2b6242053cefa58285a35f80f6ef30efa02a59367942c1aa0f0239ec5286. 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/USDY41775254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe843f2f9d6a0e75b5e6ab9943b43000165a155d8957fc064ca18f34a1e25afd. 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/USDY41775255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29891f470c7de49833205d5f1f176fcb7c57f8d3062effb537603fe246adc05. 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/USDY41775256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7eb31160cb1ff5319a2a0f1c840da592dd8227ad177c7e9ade7f245de34aa2. 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/USDY41775258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2032893886deb538a3c47d162edf4c31e13b05ca8d1c77dcb8a64ac695199b. 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/USDY41775259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e7336fa775dad006670d3e7062a98c97eb9a29e9240cf6f161173a4628a7ba. 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/USHM91208977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07748c450aa363fa8a0fbc846783199b969d8e43c3d277d006153d579818209. 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/USHM91208980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c3885469f12da47cf7d65a40cf076c00c98f39eb8b60403eb69272489006b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91208981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec61eaf4f34a622e992feb92daf605b5f1bc4cff6151210fdf0b2c024e76ff. 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/USHM91208984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaf88c4ce84440c264f831a6a56f1f5db0ba1e2906fc1ed8f657d19ffc010a8. 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/USHM91208985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4bdfd0c96382857e10242d300ce68159d1f110062fe1262001fec9528ef68. 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/QZRP42418125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4585406d46705639d742d00334aaf158fd0e80c4d2a2ac07ae5fde7fc858806b. 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/QZNWY2446876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4e844f28e024f2d55cf3115ab2dac2cec03565cd91752b3cdd3b1e4d4eff31. 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/QZES72465295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6a9fd973c0f39bb498fe5eac87eec18540d0e5c67fcde6719da40e49ed55dd. 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/QZTB72315434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c1c378c108ce0ffefdca473ecfc2178c203e7f4691659c7b6e964c93dfbdb2. 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/QZHN72390975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28b3e4a72dbf291fc4dfcb8fc4610e580c5cb77744196d1904633e66306e57e. 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/QZFZ72324293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822cec0ecebbffd959d1671a254604cf45cba4df095a381620f85c3bebd53e52. 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/QZK6Q1957110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcefc0c4cf660163c590412584ebfd81940363a52dfdd70ef95951283ecfa4f6. 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/QZFYY1930710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a00907cbb1e7a4043a4861832beb7b98ce60b49153515c26379ac69006ddb91. 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/USL4Q1885211.