thumb|Cross-section of an unprocessed piece of ebony wood Ebony is a dense black–brown hardwood, coming from several species in the genus Diospyros, which also includes the persimmon. A few Diospyros
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 0x34e2df3847167172ce66cf4c85abba7883e40605eb14930d1218d4122134946c. 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/f9ddb699-1585-4d7f-adb8-c47e088c22c3.json and https://artists.proofprofile.net/proofs/artist/f9ddb699-1585-4d7f-adb8-c47e088c22c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Don't Boogie Mr. Tango (Remastered 2023)
You're Driving Me Crazy (Remastered 2023)
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 0x20c4ac51aa339c514f13c48a8c65bb6416c0732fe2d76dd6c2ef94aaaafe5fe9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEX051100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0205b9c58a72b49f75b240d2297f56b36dd9c9442c155ea7815fea5dde5365d0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEX050900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07479a3970eec7e84ae415e4e892c47d807a1d066a94fda84fb5991a696c9c99. 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/TCADK1770329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635f8b2b55b68f82624de6b310206bf72b8bcde6935a3a746e20ac273048d85b. 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/TCADK1770399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3255ebdd4819e8f8b8d0bd30335fa28d027cd5e4adfdd18b647ada46742dd4ba. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCADK1770421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd559aa1e4f6d72ff8afb0b4e83bd65e33cb6ce09364b4f43fef1ff1388045be7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCADK1770433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ab0579e513c8f8c9ac5b8b98bc862a849d8dc27d3de4cb7ed530a44b9cae08. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCADK1770443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f65caa90d18e72b0a5a084b274c2d854c58bf64631f42add0cdf491bff4eb2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCADK1770447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07479a3970eec7e84ae415e4e892c47d807a1d066a94fda84fb5991a696c9c99. 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/TCADK1770329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635f8b2b55b68f82624de6b310206bf72b8bcde6935a3a746e20ac273048d85b. 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/TCADK1770399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65135e121101d9e8bac015196d247cef4d9e5fce97f877cc93901b5bf3443e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLRD51953075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460ab081462ed1e29166a43849947294fc40969f7161f2c630473e8583c51995. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHNC1956079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409faf345b5c2b6a81685238aef144793db5277ca2c1782817acccf339ad642e. 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/USVPR0006666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbee34dba881b6b34022dadf7eb56caac8d10c0b8e6fca07f5e7e9eb9e99877. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR5U11802806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0aaacc4c2b11cf01ac0b2563f799914f99d4423ee8ef9bfc87f35b647644c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR5U11802812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a82397dfed1913f3210c701f87646b08e6acfbc965fb9a6cd736fae5eb7589. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ651341825.