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 0x6fb4891f9247148cf8f9dbac8ee11f0afc0549e8b1689b98221476271d65d0b2. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5719f9ab-2a40-48fd-85a0-4583468b088d.json and https://artists.proofprofile.net/proofs/artist/5719f9ab-2a40-48fd-85a0-4583468b088d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sacks of Phones (10th Anniversary ReMIX)
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 0x4d21eaf0356222e53961adaeb175ff2ec338796e028b26a29287e51ec9467346. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMGR32105201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48429f8d4a3db1f512f90fcaaf7d35ed3939c45247da5167048829157de14a4b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS7J2274682.
Philadelphia's #1 Deep Cut Bar Band Covering The Classics, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bd46928ae3eb4c5d0bdbb705695304125a7f1305f50c7a482d1f1d405c5f66. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZS7J2494870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fafd9af70abd1f53bf4c436acc13571040e97c2539631dd856f2c4c283805b2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZSBR2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a9f551349adc86e978803d686039cb8d73f5f0b48f0bbb4296ec0bbe7d1c7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZSBR2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826fe9e9cdb4897d542dece118b1c96ee1a23b1dc783eae25cf565f8bddadb8c. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZSBR2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ff4664b458f06ef0d106fef91e4b999bf016b1d16410cbbaa19a11a8317547. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZSBR2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fafd9af70abd1f53bf4c436acc13571040e97c2539631dd856f2c4c283805b2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZSBR2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15aca5e14f16eb5f66faa69a40c4d40699fcdbdf5788c9bffcadc616e909780. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZSBR2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ba0d9fbb2cf0a3faab6c2ff8f5e5d57e7100da0b14c9ed2abd463cb0232be6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZSBR2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bd46928ae3eb4c5d0bdbb705695304125a7f1305f50c7a482d1f1d405c5f66. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZS7J2494870.