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 0xb6af70320a628f417fb00b16ef67d32e318671fdddf8065da0546b9ab98bad29. 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/3452ea29-13ee-4f71-83e4-e65e63d385ae.json and https://artists.proofprofile.net/proofs/artist/3452ea29-13ee-4f71-83e4-e65e63d385ae.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 0x707fdc51340e6898ff3eb09f7bd141ee8ae6258bcc972fb1304883457f9ec087. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCRB9900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e4794299ec08a7e6a6516ef6cbbdf7c1974562eb23708e6e7b9f21766ec1d8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCRB0000613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342377fc8ecfb8901fcef9113be3e36d0a2260718facb084b954118f7775e8db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCRB9900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc346441c1d5e67eeadf8bd6c31a8b68d684003aca75df8bd1d25a695063b3fdf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCRB9900157.
All My Rowdy Friends Are Coming Over Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc51af1798288ce3919fd9fd3190a46fea7fb6fc75047a57778eeef1274cef1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCRB9900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfe969df76319dcb17297a4f874f288789636c2e4a74ecd47dfc5772b053611. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ7KM2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69539434eef3e5a402f34dd8dcbd3ebfac9bd51dc5e21bb6463e58278b87e66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72405589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89848f2248bd70286da4507649e655fc73b3e46dd2d8efe65e371471a60e7ff1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USWB19902712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5578e93f1a3e95dfcceb91c154a77d0cce6f65b17c922c17cb87a73ac172c. 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/USCRB0908583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18c8ef393fbac201b3e06a87bc22b83025138ce6923e40eeadbac6d07dae9fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCRB0908584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acca72dc1e6e720800f18414604e6dfb1dd742d912de65c3576218705e01b67. 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/USCRB0908585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6cfd5c99832f2a8bca66f08f645e8e492d625567839627b2712ec7cb104eda. 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/USCRB0908586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933dccba4dcb584490cf63cb0cf8c601d87013617da91541dd64604414839ca. 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/USCRB0908587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fb8973b2f5a7694708a5e181a68c4d59aabd0494c2652f44666915b0cfaf38. 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/USCRB0908588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff129405ae23a77d9549a42b6c7592eb3c3cb86568b4c35ae4684d9f04115a9. 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/USCRB0908589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc8496c7694bcb46721f9865baf4b1d0d9d6b29199f0a0c02c07ef8a07f133. 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/USCRB0908590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cfb6cb5ae283c72d78f62c46c7862032403d95d109fe555369888a3b033db6. 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/USCRB0908591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb935588f57865e27b3bf366a56d5ed0fb3e07d243a12613277f1accc682cebeb. 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/USCRB0908592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d99b2e917a67364badae997c74661bf6091a259c8bac20449133d7e7ccf096. 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/USCRB0908593.