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 0x167963529713dcd97c8c26754c458a93c17997797c4b361357e6fa7b7e4e2ba5. 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/6c36e6b8-278c-4899-a2d0-58276dfe51fe.json and https://artists.proofprofile.net/proofs/artist/6c36e6b8-278c-4899-a2d0-58276dfe51fe.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 0x344c22d1bfb665e1b151142b4cf74beaa288e1e249efbd2a7918cc96e603940b. 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/RSA221500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f548f30ba65e95d2edcb39189565165c7fb882e722520e6dcfec8d133849eeb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:45:11Z), 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/RSA221601123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2381ff09af17932415d9272545605284ba86aa24ff26781da317069e995ca433. 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/RSA221601128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fa0c91a050de874d808313388f9786c8b238d6f47911d73edcf51085a4b273. 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/RSA221816095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f474a1517608c9e612aed8704dbca85afefe636e107f83f9f83df6d4af442b. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/RSA221816087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2faa368008f409046fd608efe474b54782db8248a02dc24798b3d24f67e6dd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:07:50Z), 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/RSA221816092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2703a217f73fb9d9b5ab39e5e7acb142a9099cd804a1e69d34f9bedf57ec2d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:56:31Z), 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/RSA221816093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fc1545272c98925736981f4d7fb8ed19f57960f91bc32291543b59d2066e43. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:49Z), 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/RSA221816094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a789992c395f9f41b8a8c0f649493d689f1bb5904121a8eabb0b312767c352. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/RSA221900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1365998b9ffca8d62489cb09e14863ebd83c3a30d142de24c7c6ccd51c2efed. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/RSA222090022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863643401c1fde8976329f60fa06e746b86e380601b083e7b680853ad49c8a4e. 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/RSA222190053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51870c432782bc828ee9d26fd4419405ed092f8b35c451a150b552fcd3d11269. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BAA052232786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390e667546d3e3ad2fbf7fada9747edd2119433c0ca22b4d17b79f52da1c1ddd. 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/RSA222312338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e093102c7f43e849ba3834fac50e59979893d636dd4791e2d401a536379ae9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RSA222312340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d7519b4c601d80bcd0e11cf0f6a8cb1c707866a8e13b8764578a3927c9306a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/RSA222312341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc723e93650c487e5eb1fbbaea5d85d06d18e1c831632ae9ca4650422b3f1dba1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:35Z), 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/DEKB72535434.