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 0xdcb3fd3fced0ed9a05bce8891fb1af6583f3ac3c1b42f98ea599527df8dc676f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45bbedfd-ebd6-44a6-9bb9-f50541a4fe83.json and https://artists.proofprofile.net/proofs/artist/45bbedfd-ebd6-44a6-9bb9-f50541a4fe83.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 0xbb3d25bf5ab0a4447b972dcbe44d5fdeb665227e3e296706c2665c42d1bcd3c4. 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/PLC062382987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ddd0068a3a8ba96ab42f9dfb3005a015a8a1dd194f2e8c75cb9bf421529490. 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/PLC062382990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f47137d78a2c045ac6f988b087f1d3e9eb4b1e6b5abcc1b02681e4b29b9051. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:12Z), 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/PLC062382992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e7c393ee87d8f9777344df0bed5f7a90525d1291a941a2571e0ded4001226c. 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/PLC062382993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c779393538368f33b556e1a9a80a896dbf9f69aaca81565ffa63f9793157d4f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PLC062382986.
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 0xf0c77feb32635fe0c3003e86d7a1b32506452c6be48a273243ce6a478c11295c. 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/PLC062382988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35dc35f01a65d40a4fa5f648518df4ed6172d0511f7478175c33d08bd283fa7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLC062382989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbdaa0095bdcf5fcf447d7171eca2b714eab4a7d29f18abdcca46154f615366. 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/PLC062382991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168ebdcb9283c1b22d7a24905d280cd9f2438769303cc6d2e2bc874412788432. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLC062546079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42265fa2e3acc5a3d609007c64bef9ef3db9e632284df81aeaa46d72954f988. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLC062546075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99003e3b086f7bf1156ed265228f521703ad1cbafae3f9d5e3306391206d77b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLC062546073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363de17acfad9f4c406c75af90efa5a114a7a335d318c0db97998801f6ca11c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLC062546072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e903299b5ef678837d85713ca662e8cc49b8653bc833871b9dc91147cfa340. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLC062546080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f2f996552cef825e97cfbd02e9507a224c0f0c48117a2de46047faa4e5bf30. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/PLC062546071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc644c755623f7397c698bbdb79b0f0be9e3c7fbf014adc270d9b4c7c102a03bc. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/PLC062546070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96edbeea0b16255a2bf80bd6d3aaff63b31358c3915490ddff0c1ab5daf3ce14. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/PLC062546078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf264d149f913c1319ab5170b127d9fc0eef7ec00c39e298c37445e05618bb9b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLC062546077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62375c4cb06104902ca937b7f9e85711102e8b45f4f6fcf7a84a174867416e3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLC062546074.