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 0x6cc6ee2f2bc2fa1b4afbb456f880ba58ab9b656aae27ac05335a854ee5a3adc2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b45d2da-3cb5-4376-a70c-8640fe06d2fa.json and https://artists.proofprofile.net/proofs/artist/2b45d2da-3cb5-4376-a70c-8640fe06d2fa.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 0x3a019ade7ba12954e427d6ba0662640a2247913fad94208711d66440de14b511. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:52Z), 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/QZMEM2440192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e368c34ebf3adb5304d2274770acdb797b9b4100f27cc102d0756b9fec11fa8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNWX2495525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeba71dae46a205c54eba5c0bd7f7a9f21287c012edd5ee73f763edae5ca2539. 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/QZWFN2497775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9256476b5423fe77ec5841722260ee3503d4c0835eb3f0b275d746f4b7b410. 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/QZWFQ2497654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18355fe1e7cba4c13736e6d58bf211a4ff0f34abcbdc0a0ffaeb58cf813c86d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFU2409214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fb0acf02b779871a38c24528317f871b83070506ac086586496afc5481ee2. 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/QZZ762403556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9ffcfd0b38c17ff9cb30cd65105dbeac4d3296b320a033c11940a8dec5861. 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/QZES82556864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323c58ecd9f0c18fd40975735cc00821a3827299f72cbc4fc79b7b8436da13f7. 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/QZES82556865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff0657dc5b3a8673b7554aa138e9d7ed8fe3aef240c6c00a861c06faf5a444. 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/QZES82556867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8699656b9c224b50487d9ab2d529ecfb65502e2c2d138ed5073102c55dacca1c. 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/QZES82556868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59f57a6ceb088fbd6ee37815514744609edf1619a731c31cbf2d30f0a2b6a3e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES82556866.
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 0x2adbd84a2f2639eed0740d2aeb01fd218434ee6cfeb9649b0c6fb337c8d9c9e3. 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/QZK6L2590817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09acc55e5db257f871c86d3427aecef342e8281fe1ee794f61f7c5913b7a66ba. 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/QZK6L2590820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c1839d57946b95aeeb0faac7283d4b6644f01b38290aa40b0f51e4a38abefa. 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/QZK6L2590821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7608537f15b648c465e62197132f0023af071aa9a3d8a377d8f61c66f49f0771. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:50:38Z), 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/QZTAZ2513734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db5d92ded221898ecd0378b792d1c496390ff5c10eef832d23f18bcacc98359. 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/USA2P2500361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7138d5f1bb6e2e5f09d8e5142ed215e9a112abd52333656e28c1bdbd70e503. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ2503709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40ca5d2a23503a79752d9a6eaf579fee2dfab44a5ccc368309ada3672dcdaca. 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/QZZEB2421298.