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 0x9dc857f51a2354167eaef7388279093cd0b514d71cd82cb3a37ada5c236bc79c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0801afff-5300-41d5-ae80-c4cd2b70d81f.json and https://artists.proofprofile.net/proofs/artist/0801afff-5300-41d5-ae80-c4cd2b70d81f.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 0x546cb1c57b028a9807bd1d075b497aa22702a21c41bf92c6ec0dad068f7b440e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAEQ2038609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185877e154d9abef43752665dd91ae4243e282fd0ad6d14a0b5046a1e5417ab. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/TCAGS2354889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635f66147afada70031d1a779e2216b613a3ab42785face2c1a055d898ce149. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAGS2367794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcb8662c8590f2c0cc9b69fe581d8ac6c5d7a0cdba34c20e70f69e89143fea4. 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/TCAHB2329641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9037d30f3bde1470e1ad383982a99fd55268062a8d2abe48e44e5d086e9f91. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAHF2318996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66690d1fcfbdfda22bce30b17725947ea79b7418183c187f2e25df35728cfafa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHN2312197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa971341baa09ef8b1177f85d9c45be1f73fb6fa5cfa58b3dbd5356710808a2d. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/TCAHP2395819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf4a7ff4ee6baaf920127a87630736f70ccf8b1a979eb937f5093d49628ce01. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAHX2429208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09780f0bf2cfac77ee46abef56899e17c3922fa470531c98ccdd303ce7e44ac. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIO2472679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe324e5f14efd5b1dbaaad94d3bf93a055da5f629a786885b55e60c5311f664. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAIT2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6e5d10b1609629f9e35ec0072571bbd9cb4194003ea00e68c1ff2ce0b294ec. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJL2599281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d4b8159809308b14048c529ce59f409af70113b8f334295be4c82e27aeac91. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/TCAJN2502207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c70556413dd32f2d9f8de48b322c9e7c45c3afa92122233f3c4e032c5e08eb. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCAJO2532168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e0616ed44dfa8626127fdfacccabd941fe5d52155122da058d1c43c82fa3f5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJR2519890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cc5f9f8aa8db99b4e7f50efe5676cb791d0d92d3a870d2cff4ed9bef3a6cff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJY2573534.
The Sheepway Massive (Pistol Pete Liquid Mix)