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 0xe660061c2e9242b731bc2f02b22622f399c4a65a00e865f679045a72c2ba6d99. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a0ec2d6-11b4-4ff8-a97f-35481501de70.json and https://artists.proofprofile.net/proofs/artist/6a0ec2d6-11b4-4ff8-a97f-35481501de70.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 0x06b6bdb41fd49624edba9cc564410f8062602dd9c9f005bf008635573b5ed51f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:41Z), 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/NOPTR2310010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92794f4f931750df96be488d83ec6cbbb6568987491c8bc4a524f61ac66bf333. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOPTR2416040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc655fe41e75126f7e52cbe35183c1e1725e6420186cba88452e98530837bb95. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOPTR2430030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e71f8f1abdaa87d0f65c9b6e90da5e4d33b9f80105d50028490a6542069ec79. 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/NOPTR2430010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80c09b62abc20afb7c8846d9cab24a0d6cfcdac9317fe236591a05724decd6e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:37:38Z), 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/NOPTR2430020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7ae0b579d6486cae1702f2a5dc47446322198628bb2b83c9886c3676f07ea3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOPTR2430050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7622f15191952f767647e92dcd3c07a81ab6c977a38cc5f5ae2eba4787dd7. 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/NOPTR2430060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6165963ee0f4b64917ef688c1284974e4c869934c9ff49783e70b5d82b5e73b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NOPTR2430080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5af9a9852fe95dff84bcd430943d426a27d79ed61c4e4317e804c54dfbb6b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOPTR2430100.