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 0xfa4f690c67d41015c83977118c25116ff1450182e8ae8b0ccccef8760b46ac53. 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/d88e9bd8-9aac-4b5e-a53f-4f3b3fa8888b.json and https://artists.proofprofile.net/proofs/artist/d88e9bd8-9aac-4b5e-a53f-4f3b3fa8888b.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 0x5251ac647ebd445ed770caea97a2dcaaf9b102091ed7d7672abb6707be92d95c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEH742304585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118f03cb1d4d151ac05683f0f3a3253003803eda781dec4d5e60f440582f108b. 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/DEH742313045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f85c64af028acbfe9908a64b137980c3d06b3536224a23a706e39bfade05d6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:59:09Z), 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/DEH742319492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785636099ba1cda36e473522f7165e36b025cdf8313f41330fcdc929517cb5b8. 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/DEH742328216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce93384ed7806b5d3a34828fbab93555e6fce1ee746f5fe68ce1a217c2c4254. 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/DEH742400152.
A Day Spent with You Is My Favourite Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb698f2bdc24f77d2539fd36ba8b481dd97c38a603da469e01cc33fbd1171da7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEH742402414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a874895e03fb2913e409b7407c43c86965dff9134c158b99fab0ca4bd56e5ca. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEH742407536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b345a7048a6572818410a8dd4be0738e860b71a997d07ee2d297713df0f1a2. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/DEH742417337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2656c842bd869ac74b486c5de91931436e0a0b895fe4525c796e3ecf42d378. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:49:53Z), 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/DEH742418711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a838089b23ee5d2bde34fa6b6f1070917a241564736fddce1b0aab738fd69a. 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/DEH742421042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe393b70c5d3720d3af1c18d5f91dc34bf892f78f59a69f2ea01f7d284c5bb627. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEH742425642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b87a772453d3ef44b174215f0ef243e12048e2d20f8bed069d8491f1210722. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEH742430664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210eddd68777eec8311ca63053a8be347ab2289e40e1aad748566d60aa23db1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:37:39Z), 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/DEH742500976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42484accd02c34832b8f0f32f9b28a0b06fc6222294ca79a352df3ab17cb99f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEH742506403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ded94742ac79f92de7d0cf726fe2a7f1abdcf38754556ffc57f0be7025ac79. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEFF42500037.