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 0xe4e82f0f4c445875e2dd8797952146f432a2547371b3459ba8428e98bb8d8a16. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d18ea67c-9dd0-4ca9-939d-37b0bdf5c23b.json and https://artists.proofprofile.net/proofs/artist/d18ea67c-9dd0-4ca9-939d-37b0bdf5c23b.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 0x94a0894dd37ce575df6dfce7ee7e15240be61c22c31de6c5c5ada09ef1fa8bb6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH1670932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090e200b9cf3df4410419fc218f46aa0b8143570960b8ae3232d0f97e0dc504d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH1670933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb49e9e1ab1f3131739ff022e14752ce4161174a5995878731c3746f4dacf6a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1670934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b10506e50063ce8c190421ef920943fc9b03f30e74537e3c032f18076db13. 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/USCGH1670935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334bcf0c64706c2c82e54cce755ad0824a7476ddd68ef5cb1b40b754d9a2b5b. 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/USCGH1670936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc866b4d6a6b33fdc6269b5eee5bd13b04c5da8d0eba29b810c426cfa698f4c6. 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/USCGH1670938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f15b0c3c54d5090819a3e42b085f1ddc4403e710f80373d416981375232d48. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:31:17Z), 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/USCGH1670939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b0fc2bfc49f98146d8c45cf812583c7390e3ada03f1349148550b0b4fbc79f. 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/USCGH1670940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259d3df03a2449a42547130c02e207e1380d6c87535ec022e342480827eb1f4f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USDY42393010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af1a207a6143bd3ef132e2e302c96787c50c49d7a7b22745a2b08c60d355605. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USHM22162268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa582b0dc67017d54c79b88e996a6d3c7541495c501b16703af2cab5c98d12. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:28:22Z), 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/USDY42393012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2965c01fc34955562f10324655d1a7bad9de46dca9858a491445ef17b802adb1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6M2533550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7abd57f0250aae196f4ce816b6302f3541ce48ced5f43b4bb8cff9fd0e6652. 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/QZZ7R2463380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5784405f7d91708c62a93096af23534ea250bd021a5436ef09b51711cada6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2116396.