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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf09534e204fe7ad89a9be65e8816e761b30bf6a95070383bf1aabc17da592. 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/a74a82ff-a8ff-44be-9844-ce4d57f057ca.json and https://artists.proofprofile.net/proofs/artist/a74a82ff-a8ff-44be-9844-ce4d57f057ca.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bce81663cd86442443750718410da2cb475d14568ea4e6fc0ccacf37429245. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRP4A2412111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3ef7f366f6d4a3859b58cfb8f7fa07a40d5af88c980c86a00959787d5b5ec8. 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/FRDZC2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65127d0d65c40b304e2daba68ad141c24d19f2a68621eca006638cbfe7abce7. 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/FRDZC2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61f59f77aa0501d94bd4ddbc0f1c6829460a3205fa6e2494bd064cb0ab264ff. 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/FRDZC2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51dcc00c5918e440bf4ba1b8a41c651d4b0644e4461c0cdc9028970f2aff7f9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRDZC2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71bb0faeb13a97442a0ed84cdc2df88a6f16dffc0b2e27cc30c6d4fb7b5df59. 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/FRDZC2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad77a4b6b858f33b87dc9167d403e1d0b2ce1db68f8740b95884bc1504560312. 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/FRDZC2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb6c2ca3b7af15e0e51acab4b619d2ebfff1b38a79aaecd339589ff581b551e. 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/FRDZC2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f911ff934d915234c10f57b611fe47625f6f9833e649619f298dff9c77195e. 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/FRDZC2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0086cf2cd183b03ca46119364ba30badb52f93808cf2685a75effa3f09781397. 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/FRDZC2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d462902e03d256e9a8b814431929eb612d779d5c5b60f065d2fca8def140ce1. 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/QM6N21943891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e40b570ec77a66eeaa1570fbafd5c8ad8318e7c33bc9ba631fa4c85989621b8. 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/QM6N21943893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf471c374f2861b467bbf15435f0f410a4accf6810709bb2212206f49aa3b8ef0. 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/QM6N21943894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d24a22bb9fa42399974b06ea6014077501834054bce82235ba043c9efed300. 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/QM6N21943896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0be69b6ce1328d3d42f1e2dec5cc8dc9da6ff0035cb5c8af55dd297846b22. 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/QM6N21943899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74115bda268249103497c65a0c2f38d3a68939bc344807340f3005ed7ce1c26c. 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/FRDZC2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8260dc44283a90bc2f5604d60d01fe5010e1f423cd6955b9d3e24a0301a843. 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/FRDZC2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51dcc00c5918e440bf4ba1b8a41c651d4b0644e4461c0cdc9028970f2aff7f9. 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/FRDZC2200040.