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 0x2cd63b84c170ec4869b86ef188ebe18dc231918d2b3826a43a5da529efd01db4. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feb16a37-4457-443d-9aa6-21814e95f70d.json and https://artists.proofprofile.net/proofs/artist/feb16a37-4457-443d-9aa6-21814e95f70d.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 0xfaa4663ad1f38c4fd6d908d77eb1aa99824cd46369b8ccae3b345749a08a4303. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZP7F2195490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb33940da73a25fc31b457a65eacd36db9163dcc48b80833350e801a9f5ee983. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZP7F2195491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6038b9aefdb93b2cf068694e096b31fd3489face9077888848a252ca38b9e7. 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/QZP7F2195494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78c83a46455f66d4ff87a2303484c5babcdbd1d108d8c8877f22840cd463bf6. 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/QZP7F2195495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf3341bea04c5f6ff3a76e41959f3947e72c9df59a65669936bf528adffbea4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZP7F2195496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3418584015bf329c6f4d8fb9a00882b00e139935f9354878b6cb504cb385f9f0. 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/QZP7F2195498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6045458f06fefe1d2ca638af6daaad614fd31a45c7a1151c7754eab19273941c. 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/QZP7F2195500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf327c7d815a2c764575f2830d1bca2b202a925897b30c4d091fd16dae02aa63f. 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/QZP7F2195501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba8c750d478e0943f8b92998b72125c3d0f357b18969f11a2c158ead31d3da0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZP7F2195502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1715a6ff6939f1bc9af9ee1216c2ccff0f89ebe25dfafe9ead6c2d02f3439a05. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZP7F2195503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1857fbb11c2f32d3f993db811df07c3e8be3a5b66d2e9a7693af9b382de95f72. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZP7F2195504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aeed46fafd13d2b500b18b7cc1307adf96da4b838ef176dd9f1ff1b5edb4cf. 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/QZP7F2195505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af881c9b8ee37ad7c331e52f964c68da077187fdb0ebbe676355d0375f80c67. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZP7F2191257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f28d42f8bcb147f449a7fec16b4cadec50eb17598fdb056a614e59edb2d8d8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZP7F2191258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef177b5bd5acea6b080c30de0eeca679de2614e323760aa34467dae2a799aa12. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZP7F2191259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5e939d984780078f55985d171eff68dd313e16fb6118d14409583bb095e974. 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/QZP7F2191260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee40233dbd8da0e2af86ffab01274e9b7f3cf55518f831a2b92827be162246d. 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/QZP7F2191261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ba425bfa7f332ce42a1042211acf526bccb93d87c91189ed138548449524d0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZP7F2191263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ebe745f300dfb9191e2a170cd1bbf3d0e4115561962b8c0e447e476354185f. 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/QZP7F2191265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32482cbb6185fc2e51c11517491dbf45d6e94bdfdd21fee0aab5c3aa7c1f7842. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZP7F2191266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895074898d224f8716d73e5f18f84715d4628467caecf693e0ba6bf5da4d5cb8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZP7F2191270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf014152ca7bc06ddcce5ef4c8a0ce82fd3758cd168b1d01c40f01b0db3499692. 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/QZP7F2191271.