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 0xfd255007443d414a29f2922bba320b27dcd8d02f0ad2a697c614778613d3322a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff2f5695-def1-4b0e-a07a-a0cf61fe21ec.json and https://artists.proofprofile.net/proofs/artist/ff2f5695-def1-4b0e-a07a-a0cf61fe21ec.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 0xb62943e7d27b26985b3d4ab99ad0fe77884cb4cb48604f7512235a48b64c27b0. 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/FIKHY2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3abfd0c0f7d77cfbc0121c298d0aa2493f9a92126a14db1b2d7fb5bc76ab259. 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/FIKHY2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42f77b6fae9a07f78e2ee9a4e51d9c6ea9f78e082c9ecef9fa70f2dc59a445. 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/FIKHY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd682d277b2b52c75310cb9c8075cb87753067f46e06c1939023d936354c0f5. 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/FIKHY2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f701d0ad7e3b25b4e192eb9cc72b6f13bd9bdcdff69eda21c8880f7e6c0193. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FIKHY2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ac22e496700091484673fd7bc12de7447d8fd9d360c22181363d19a1c0b3a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIKHY2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7643f6fa269935d23d48a17502b9f031f1041b60eb0aabaae372cba0f7d4448d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIKHY2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e4b5ff83a068dc4a4951b59037c1bcc96f51d22fc16393b23956f0696a9433. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIK3E2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03486643a134b75d4e24b0471e4e4cec0bfbdb70e1f8626276174bd082561614. 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/FIKHY2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bc09ee72406862236d1ed5bbad005786f72bf9116c5d4ce4356c0eea4bc031. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIKHY2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6de8b9ed1dc59ad03109a582c64c3cd9813b83bcd2327452b8999ca3a1a0b0f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIKHY2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeea29029777e03d7ac190756f157c46d39fd24e7a52bfcf52cbe8426b4117d. 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/FIUM72300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adafd5abb9acba1db4ce6871f2c24d77cad7544238624c49b7423b3e5bbe78d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIKHY2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e938101db9d6a54e67e8dd013df4b934096cc5c04731163a327428515570bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIKHY2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42f77b6fae9a07f78e2ee9a4e51d9c6ea9f78e082c9ecef9fa70f2dc59a445. 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/FIKHY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3abfd0c0f7d77cfbc0121c298d0aa2493f9a92126a14db1b2d7fb5bc76ab259. 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/FIKHY2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3abfd0c0f7d77cfbc0121c298d0aa2493f9a92126a14db1b2d7fb5bc76ab259. 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/FIKHY2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af88be36475bd27213129044a1d393e702eeb06d8ca5f34a225cc383c1fc8e8. 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/FIKHY2500018.