thumb|right|260px|Larry McCray (2012) in Aarhus, Denmark Larry McCray (born April 5, 1960), is an American blues guitarist and singer from Magnolia, Arkansas. Early life McCray, the second youngest
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 0xf9f84a73cb5b26350bb402096c50c15709f59282bf3e7c65906fa4ca65718573. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/090c8f3a-417a-42ce-8454-f6b5540dc5cb.json and https://artists.proofprofile.net/proofs/artist/090c8f3a-417a-42ce-8454-f6b5540dc5cb.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 0x2c7bcbf9ce6700c624d4dafbc4e4f4b04fe0e979fbbef9893a1e8b0cc5d53246. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:25:49Z), 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/GBAAA9301527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04813f3f46943bc9463c7943af6ad68b9e5674a2f2129010545629b045b3080c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USMH52201018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f51f496f85209262fe09432b85713a16950a75d3aa7fc2aaf890e372ed0736. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USMH52201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc55557a5d1d749ff8235b38d9bf948d8f02d2714dbec2a5fac52a7a9541a33. 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/USMH52201026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c897f809626d03c233d16e2626ab29b18dfe41314c20f8427243adb48f470b1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USMH52501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ed5a0c677442f27d45a21e675ede589d62f29dbe75c43fd374c585ec490a1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USMH52501406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaae2c221befe752f02b6035b08e5a68d228b6d4aa25a42adc433b23b65d082c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USMH52501407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd0f552f6018e43fa70da8dab2e92d309198ec441057184bf0df97ce97b35e0. 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/USMH52501410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a556a402c87a7956ff391d26fe3244a1a3972ebc971bf310f7194267e1f0969. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USMH52501411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefdeb5c5d0d6a7ab456802bb691b1f21b961661ff9f04a0ad3677b1a4bdafd4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USMH52501412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0299710ea5df31a89e8a3fa5bbc5598e62b057a29c46e710e103b780de3d51. 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/USD841010055.
Black On Blues - A Tribute to the Black Keys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2caa733b15013fdefc68dc9653104163552426c928ce35012026cda9d2c85d0. 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/USA561156486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ff01ff68f6f97b8a37ca6ffd908e1d81a6c4236c9d615f67072c25f77761c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCMG0301884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec383d534c39421bc3aa69e6fc40f42c21c8b5764afd722dcc8c9f9042fc688. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM6XS1575735.
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 0x33cc9b5c58f78fe870ddb234225b8aa0fef9d0a921caace3b5c8c1bca1462c96. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QMANG2242125.