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 0x83e8f835d449fe3fe4eb35724b74a29ad7ea6bd5951a2d21b66a53d463f074a7. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d1e01f2-975a-4983-849c-37fbc2b5d4aa.json and https://artists.proofprofile.net/proofs/artist/0d1e01f2-975a-4983-849c-37fbc2b5d4aa.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 0x3e3ea23f288947bd42db8bb33260ee6154f3c5ed3a2a50a4ce2b1b94e6d94e32. 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/USA2P0603700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fe4e13d8bac1fda42e473b691956a055d6e9aeb4008ad9ee3779b75faa0793. 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/USA2P0603701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82e41a24f3e73fce0b69168599bb09cd793a497ac7f8fecd6c78d99d7c3222. 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/USA2P0603703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f96c19a61ed2d46ec6b44d1e2821397731185d8c1a5223b56bbaba44eb26c4e. 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/USA2P0603704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8130d12487d2855e9fb54df26837b5b53af31e7a1a6321ae38142512fe7a006c. 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/USA2P0603705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073347acbb406ea5105024ed10f0bd12e96f12198f9677d72b9099c20b36ae3. 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/USA2P0603706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b03c5a901c0427d6156cd2394c16df9453b155bab6dcd98a16489021d08049. 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/USA2P0603709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd641e40870fba366ccf0f73baf355927a2072775b36dc645eb24206dd0f32. 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/USA2P0603711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d818e143aac8c772fe1498d2d7233636128f2ce227d8426165b681fe5d5b93a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P0603713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc910dc2eb8f1e52885df74b363c05483b4521558f7ddc2945d7ced2dd6b9a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P0603714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09f9861e04a852866af08636a6e22b7a5ef629d599f5b98eac9f73c230bdbb. 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/GBMKA0600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5d72bec3877736c72331610e7817686283719a88c7c467f0844eda7bb5ef78. 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/GBMKA0600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851eb84ea0eba163568c6ffc62d1518dc289c3acae92da848d8dbfc3eddd9800. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBMKA0600041.
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 0xb8a4691e421e7f3f0d5b792950c93b1c483fbbfe3c0a9f89612e1d43df688bcc. 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/GBMKA0600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be40b4cb8e3b268d193163d269bc527a56f6dfcb7023ad234d8c0d2eb68527e. 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/GBMKA0600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacedfc30be6a2230cd16df76f7ffc3b23ad9dc6481db4ef3628e5d6bffd8acb. 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/GBMKA0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16198a7756dcc6e9c0eb8d51ba7d241c1c54c90fc192d056a2932d57d28dbed1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBMKA0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47540d5157df9cdf8112825465df8a2df3160bb09a54a81fc9df7816ae8718b. 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/GB8KE2208330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1778ed75fd3de8d96ea8890c542d865a0775f3fa214e5d40d1a21493935341. 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/GB8KE2402358.
Warm & Deep #12 - Deep House for the Sunny Days