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 0x2f62f6e06d5db7abb6567c8fc0b1aeaa7531d4caf3f33505bd80449abbbf8fcb. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1a82b00-f064-484f-866e-e5456db2dad4.json and https://artists.proofprofile.net/proofs/artist/d1a82b00-f064-484f-866e-e5456db2dad4.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 0x8f513dce91684498c7756f03d3ceab6ed44b12ed2d76b125bbc13a012aca7d51. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBMA22441114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54be994f88ff3cf7a06c75266e309d52ebd6bc19245a3da30dbff48866ace75. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBMA22441115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b05ce43df5cd7355f1369b2f741cd4a03697fdcf004356d3080316f0c0c572. 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/GBMA22524217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f812e80d4d96392f9402fc8f9264a298f098502ccab2cb146e5fbf17b287fa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBMA22524218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b0310962644616beab327788655b53acf9a80d960cf8b59ceb68906a3e212a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GBMA22524219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91217139617da71a0fbbe8a6fa1d40bd0f5581994f05e48065e82748e8cc9449. 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/GBMA22524220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241fb641963d6407e89702c85b38589584db8449695464d569ee83ce19e09f8. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GBMA22524222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7a0d4055e93d01844764d435f4c887cb5bdf80f4d1380e9c46cf7ca9f5c0b3. 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/GBMA22524223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe075e38b5b0a95baa6ef064aa07e6be32d2f96578ac1a937d69c718a0a51160. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBMA22524224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95911a9294cd31ca515e73d17c564996f492ac7f19ffac71fccd971d2c9f15b0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBMA22524225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990de243315f30649e20fd7379c75a35089ac5b88693c5080eaf278d24b04c4d. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GBMA22524226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda673e4c35a972c0e556e818d2e23d8f7423ab790f1c2348a278f09fdd70afc4. 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/GBMA22524227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde79f61276e6fc00bf9f9fe25370f911cf91ade6a8525dcae6e8fec0007f0c84. 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/GBMA22524228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a078163138fbe0f92f3980e771144571b8826b7de6ba2da507723d81731dea3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBMA22524229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03fc7cb388fb18e5117c4dbfd7292fa39579147aa776a5c379146d6506f7c26. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBMA22524230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d788c3cfd86fe37a9e10c5c0aca7629994f99596e843867498ab6bef761193. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBMA22524231.