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 0x54358ea8456238a2e4e17f1179429e6bc1d825eeaed9cc3da91db716e65e948c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9b85e2e-85f1-4595-be6e-aefb3d093a79.json and https://artists.proofprofile.net/proofs/artist/d9b85e2e-85f1-4595-be6e-aefb3d093a79.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 0x3724d6bf6da0bfd39dcb3f75573399c2c92233092b4e61bb7df558be2b030c89. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZWFE2325039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc825ba442bb3fb403f301e7b0595cd577a17e15eb97844f4b2a303c502c69b9. 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/QZWFE2325042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a58569de1117b5c5b77b12f5e1d8e4170a4d1d3bfd53be3d3d7bc0221778cc1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZWFE2325038.
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 0x44b2e88ceb57aef162c634e6d0e064a8c9b7dac490565bc92bf62f9fa76f721e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZWFE2325040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c67da6816e5ccf9c401f12b229f30d2f64e2977dcece727d1cbe81c5310000. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZWFE2325041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9d508790c7c3e4f7b442bb449649ec5c1016f6718b9dad105891535e7d6740. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1923819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce32a11a1131b9ba566c5035331ba0659cd3740b64ae235a83fb4794a5ce764. 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/ES71G1835597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26144a34fe0d23dede1a4b93a3d57a96f1b87cdca76130a74f456721b22396b9. 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/ES71G1835598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aad3511dd7e11f3d41f324b0ee87e606dc18a64ed1309a49f5f8b0a7e6dd38. 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/ES71G1835599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad37cb48be25e246227ee81a2127d1548060c8d8bfad50048f077efc5c3c4c4e. 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/ES71G1835600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8851c12c40d0a39c2e5477d4718b164d4e0be791f09a63b95e24ef6351bb2. 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/ES71G1835601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020e1baa364c6619dce83669d5885d0acc8588e2a9022600d8f385299ffce629. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:42Z), 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/ES71G1835602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b87b75514b9528effac095e0cc9e8a356bb4ed9d9daf2c094719056ce209542. 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/ES71G1835603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70faed99e6c3bd4b00603abfeb67acbede0461472ec8dd6c7655ada6121e55. 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/ES71G1835604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911a59f4b91f69e248773340c0f1e50c4cfb5dff7c35be113d8b69d86ae4da3c. 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/ES71G1835605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853e0fa97554689295c0fff651ff61f6fda3cf7beae35268d7bede69a50822b9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:30:33Z), 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/ES71G1835606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9cbcdcf7fa82ed6a6aeea808ecbccb7b89809568fe90db524c2a91963e57e2. 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/ES71G1835607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26068626a1630d14447a0f19fad2cd5533cec44d1d5b49f1d64a513b31cc4c3. 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/ES71G1835608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0307deefceee192728ec162f29b0ddf019a0aec6460234ece588c8f063372bd0. 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/ES71G1845347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5b52200a2785a980769763dc170b20d900909530a5acac9cbf68b044d93bdb. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ES71G1845348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd767a29b9088831814dd1aed85a4859b6cef51e5bb807677062e7c73b2f21d. 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/ES71G1845349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431174f9f9d25993b9a35339003c03dfc0aba42190a6d4ec16b4b574ca511bab. 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/ES71G1845350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03239a0726189b5660dd067c997c4225b9701c5b7376a669fb1a3db2e3f4f7ef. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES71G1835596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5aa37088c73db99c7d3bad866246e4df1f9c7130a70d3068e1a56e40d22617. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES71G1845346.