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 0x81a81cdcfa47e78e54a2685e5f0eb9003bf3af3234d6acb2addcfce9f6c97b05. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d50988d-413f-4db3-8d23-4982e78d8b00.json and https://artists.proofprofile.net/proofs/artist/2d50988d-413f-4db3-8d23-4982e78d8b00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ALL THAT BRASS! 2 ~Sax Four/Toontown Sound Makers~
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 0xba58b285765f78b81bc20ae98687afce6b065d7a3a42aad4286a860b1ee8169d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USWD11574417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede02991fd7687f999be8aacdb2c96637c82cd561461c03c964552712f6ead2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USWD11574418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e56a879757acdd3bbf1a96f77f34f5309184b2aa6462378dd571aa5ed0c8b4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USWD11574419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa445e07bd8b364fa5f3657313ac568df222b8fa56f11c8624b676d6681b81047. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/USWD11574428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d10a941fab5d6262d13f5052dc5fad7eecb92d6f94498125834a41fbe8a46. 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/USWD11574429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6ff7ff4043f012d1cf044a2732d798b1ea1b5d44d0c01805191478d8b0a252. 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/USWD11574426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac0dba5caa5625ffd20d4aba2ed8b84c6507df237f98b5d603b4c4387236f25. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USWD11574427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1069994dc083675fefaf038e4e9b5848d3e3e484e4226904c9fec081070853b6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USWD11574430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c9147fd3ba8b308391ce6ffa7a6948d1542a4a09bb0e4c77eebd7d55830b7e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USWD11574431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9306fc01f6377b2b60445c8d9714de84a62719df1812cd63b0125b42bada7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USWD11574432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc6ad017f570c7076169b66befaf78b7f2fe8525b639673ab309b5fdb85f35. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USWD11574671.