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 0x086ff5b8e05ef61d25adf48d03480535ddaeb1595481ee61adaecbc58f27427b. 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/3b58a363-5e30-4fef-9911-3d93865918de.json and https://artists.proofprofile.net/proofs/artist/3b58a363-5e30-4fef-9911-3d93865918de.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 0x6c78ac023f2c0b36176db8c54c08e837778c6c8b8735d02dcf9c0cdb0309141d. 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/USANG2129343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ca98ed38b0cb829d3aa54e63167a2c6e5ebd5b272c40d755f74c607a4d774d. 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/USANG2185436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050fb349633606fcfc9570bfad70f6f586dc38242a996b781afdc9291adbe456. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2108205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b40f9954c85c431da1ad8d9850cfeb0c0b001761de0a04b701f10a37adb77a. 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/QM3DF2109233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b8e87956da50164c9961b33cda27c173483bfaf924255db0285737511c8ae. 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/QM3DF2145270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a6b763ffa0e8b872b7012467170d5f741258e94108a1a0e16182f7493c07f. 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/QM3DF2145276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462e3978686a93fb59b17a3bd66ec53e5a1f09d7b692828d65e3c3202ff9bd55. 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/QM3DF2145278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e3787ae3d679852fa1dd06b180110f7b87cdf95d6ceb1397d0631d8c05b988. 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/QZNJY2142443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f6ed18bf5fcbe68dd850aaa43190898d019a75d9d239e05097db0735d5eb7. 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/USANG2190600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1253551115f17786442517b5d2c806661e4328de4bb0db34c7ebf35c094eeb3. 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/USANG2192089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7263f0c3c2253b8324248cf5f3305e0341d518be996380eb297723182db4bc1a. 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/USANG2192094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca5bbdd5637a912b1d254e9ecd8c3b22315b724acc778d82a531f9f16f1322f. 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/USANG2192099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4deeac39602ea5a785570cf96a9c17c9d1257cb4ea5e3d8d312c850241429. 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/USANG2192111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8537837c64cd3af52a34f2708d3f288d95096f27fe6602eae2a870692e0f1456. 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/USANG2192113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1511822d469d9f13cfec37e65e799626250707e729206fd421ed81d7ecdd235f. 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/USANG2114695.