thumb|Four headstones marking the single grave of four unknown people in the Pima County Cemetery, Tucson, Arizona. They are called "John Doe" or "Jane Doe" followed by a number sign (#) and a number.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aa58c5643a14cc594a5498b8c4477bbb6eeb5a4bae85bde374c7664434ab21. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/069e1777-a2bc-419f-a8b7-b4e52211ce38.json and https://artists.proofprofile.net/proofs/artist/069e1777-a2bc-419f-a8b7-b4e52211ce38.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f69952e2f3d492a7b099166a35a5da6bbdaaaa7260811d3729b06dbf8eb8c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USY1R0714105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c60921a880067649606ef0820d299abdf993f8e7f5956f131a61d08b7828c95. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USY1R0714111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e27d40a12dafe99ed746c2e6f25b1f9c7d73962f6e92f0f9a0cc0b7e6932e69. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USY1R0921902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca1b4bd08c3d43f2cf79690ef87bab6932159c9e2b95b1895d35c9b58309a26. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USY1R0921905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cd24fe3f36a3451396f8450c4c41e708f5c1feb76cb280a408454e403e2fd9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USY1R0921907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53a3fd8281f60e3f886ca3650d4256abdf428d9102afd6e095043f266d795bb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:51Z), 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/USY1R0921909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2648dda6a17ee6498431d76893794c73cad925590758e171a9bc5d55b3758415. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:06Z), 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/USY1R0921910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f807d01f20046a2369fd0e3430f816819fcd593c470ab3d875a70651cb40a4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USY1R0921911.
Are the Good Times Really Over for Good?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceceed8ef365e949e66b9769bdd6e791d73606ef465d866488e3b2da5956284. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:58Z), 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/USY1R0921913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1a5c57d24baf1d922f99045f845038d78ec120308120c5c4ccda85a514a956. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USY1R0921914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7fa111c4bf5eb660f271faa5df0dab8b5a17c23acfd1aa268a9817b7352fd0. 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/USFP72280001.
Lonesome, On'ry and Mean: A Tribute To Waylon Jennings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c23a0566926d6dca512593fd36d2b85108e1f9ff92c0f93c30c0834cbe02be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDMG0313706.
I'm Not There (Music From The Motion Picture - Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09814fb26a5408f30cec5814c9b83e529ab3abc96532ac99b1415b7427dbf360. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLIC0701051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2616af0b64658aec1326f250cef04badad90100f7d79b6aaba7300747c4408d. 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/USLIC0701076.
Songs for Slim: Rockin' Here Tonight – A Benefit Compilation for Slim Dunlap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0e0ea2c6ecac747ca4deec01c2f094be8aacd376867f22d9d2715384392045. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US27Q1340241.
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