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 0x2b19cc7648bb172c73fe1081b510e493dba336260a077303ecc7f2afdbee007b. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/983178bf-3231-40b3-a1c5-8c441c7d70c8.json and https://artists.proofprofile.net/proofs/artist/983178bf-3231-40b3-a1c5-8c441c7d70c8.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 0xc7fdcd598a8d276549ddc3e71be467270c66521a3431b9cc7ad7f5e48ba51ce8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGH0799762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf00e25a127a5d05c9eb6b857c1992a69172223f252875bbe77c4faf83b74d7. 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/USCGH0799763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9a57f3f94bfd96282312b16431f6b146e78363ec1b501960bafaa3cd191052. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USCGH0799764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae6265c1fe9a3c03a7ab59b87fb595ea596bcafaf72a76038436c42d0bdaecd. 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/USCGH0799765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a7b6e00e604609d1a2fadefba5bb6cd9be2f2bea4a27b7f58ccf35cd2de3ba. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USCGH0799766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca252b6168009576c48a81599cb68f3ad32857d0a9e5ffca2a8c794e1d5be8f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGH0799767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501836debe6831e440725a16f3122899e2270c3a4b708ba3a9c0b0fad8095c4e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USCGH0799768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c81677e4bc37a693a4d0ec328388305908756b3969e48b34e9a8e7e85393b91. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USCGH0799769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4edb377f1f078babda2f8c35916b5c80f099ceeb768b86ed3532ff3f332a43. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGH0799770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0268ea21310a5e34a937a560bc4808882dea5c0621493b3935469bab1ff208e3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH0799771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76cb6dd399ac355ff9056fb618bae91461634da84187abd32ef9c2cfacb5548. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGH0799772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9340fd6c58542b73c6a107f804b26ad0d2d01627a8453408126f2f2e824747b7. 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/USCGH0799773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4524f719633f718540df5800101ea58c7be8f35a2ee5dfbb73bf22ca332242. 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/USCGH0799774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5a93a3d47b4bd8a1c08ba1c11abc335ef7c93cb9e632f94adf37854275521. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USSF10300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cda3fdfee4eec919662dccc5228ea9e2282d2f3a6493e6223056ba612a8b14. 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/USSF10300303.
A Cowboy's Dance Song by James Barton Adams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91304a2f18286a9e28d5d08d54977e849424bfc3706ce57e18c80e698600f985. 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/USSF10300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d8426da487e3b757eef6bcb057a0407c55a2d2708bc814ca373729fed2f6b3. 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/USSF10300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738457b001c586f209fe3d04da9ffe1bbaf30843fba570c0cef5faa1f48580e6. 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/USSF10300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013cc03d204da3d5d9ed64659fe31becd4809a537905cdfe9b79c4881cf7faea. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USSF10300318.
When They've Finished Shippin' Cattle in the Fall by Bruce Kiskaddon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e899d4537a970f223d182d75382ceb62dacdefadf92bcd903b7678be5fdf5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USSF10300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36bd248bc3f944f049d299267940b3a0d089c8249aa5fcbeb6fc6e389ae1984. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USSF10300321.
In the Droving Days by A. B. "Banjo" Paterson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9422b4ef06fa9f5e61050e5cf20f3fcf86c46221553550240d154f9a1762ee5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USSF10300322.
The Legend of Boastful Bill by Charles Badger Clark
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f814c309f9a1ffa4c8d0c41828c13e05dca564b6949fc69b11b5fe4978c7c. 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/USSF10300323.