Smooth may refer to: Mathematics Smooth function, a function that is infinitely differentiable; used in calculus and topology Smooth manifold, a differentiable manifold for which all the transition
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 0xd0f931f4662ad5d1d3d188471cdd8a39e85504473c24c48ebbac1e474d42e2ce. 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/21a20f53-dd10-47aa-873b-44bd59f62895.json and https://artists.proofprofile.net/proofs/artist/21a20f53-dd10-47aa-873b-44bd59f62895.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 0x816cefe3e5b62b349b5e570e336c18e2b7c17ba9eb441b1644cd1514792be304. 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/USJI10400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a26d3eb363b652ea6307f53114c61cb3d00e43ab58a719a1f42331808e7b02a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJI10300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f3e405f9e6d067363673e7ec9fd8be7316ace906ea1df155c2cc677e4d2b11. 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/USJI10300813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8841931fe320561584b4e93a164dfa6db4dd86bc9e5bad06b6eb9303f229b. 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/USJI10300815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917860d963bb96d64429233d604b11f17d09d0571c894eee4fc30bd4db9ee737. 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/USJI10300817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b6ea6cf6498f0a54b2a002c8462176f1bc73d59f4a8b2b407ba1cbf1360dbd. 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/USJI10300818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb5d7e000fe7229f8ed1f145b3a50a0e564d433d9791226b471ebee380b7fd. 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/USJI10300819.
Mind Blowin' - Non Rap, All Singing Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b53df3414df41d7de8bf626b7f050034f306cb382933c46c119f2618ed1dd15. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USJI10300822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8674c6871719ddcc1da3b7c812e380cb243ee23fa5fbe415e0a8392861cf3316. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:18Z), 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/USPR19800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4ce6c4be15b0613545d0f44e4ca54d1470a0915a4586dfbde7b1c5319664a1. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCJPB1481877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cba3e8a1f81d6400c158b926f424a9da500561c3721a2649d4e9213a7fe4cd. 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/TCJPE1607034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe837ceb51465f9687459b6d389be7618d07b97b561852cef48ea4c421bb1d796. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:34:11Z), 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/SE6A91943058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e13c056d8ad26cf424e7973704ce299a01488e71cabfa4ca0b17e38b07f4718. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZN882211174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732439a0406e272fba6977dee05eca5d8862803eb59ce7d1f174826e3319c61. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZN882211177.
A Low Down Dirty Shame (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7274c263d8ef3b28c214cdec4f9598ef24ee6b4dbd70a2aef57cb1b170f23234. 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/USJI11700075.
Menace II Society (The Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816cefe3e5b62b349b5e570e336c18e2b7c17ba9eb441b1644cd1514792be304. 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/USJI10400541.