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 0x40a3d3c0a36b27344ca2eef8573e555dd6d1658fd63c833ffa7ca0c7eea76a27. 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/2bcc3ba7-c529-4f26-bf14-dc1b1c0d3264.json and https://artists.proofprofile.net/proofs/artist/2bcc3ba7-c529-4f26-bf14-dc1b1c0d3264.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 0xda9dfcb4a5b67b2689dd616d383b1969fce1c9a27f5d6e46a7aa1c746778103e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPQ2117200.
City To City (feat. BEN, Kidney Fuji & Jimmy Johns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c055889e641dc026acae7381ab8c92a88622ec91260dbf59dc92d85f96e0345. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPR2281980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863bfca28bad7dd44cbb4f5bbe8519690d12788d8a0c62a7a0476a366fc24a4e. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCJPZ2406618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1147522f92006205e0f3778c26b04f3f964d1ed9beedf08c31daa65a8eb639. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPP302400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452c36ca3c842640cf2d2d6884b24fc4d98b8ab0603e0a73bc24d2f1297b4a07. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/JPP302400829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4745fb4f2feef4a7623051c574e60b994118978d67f0f14ef3d513163845a95. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPD2583782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c9768b0a69d0b29129ba579bafffc95e7d30fc2e13e9a1d39b6b41730479c3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPD2583890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423f5c1cab11ee440a90bc0a1c201d25957be05c565ac1c7791df9e98cd9a3c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCJPD2583988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2362e65ba7b9790a39e3f1fd05c1dbef29da6145fc753e496e0e66b7ba1a4767. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPD2584089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187cd7f740b466a466c8cddcedfb7664ad8abbee4671f099972a791f434e7d9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPD2584145.