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 0x5bace549b12adafac9015e16073c5ad0743aa1b96f28df37effaddb6756bb091. 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/22f16267-102b-4b1d-b67c-a70db1324fe9.json and https://artists.proofprofile.net/proofs/artist/22f16267-102b-4b1d-b67c-a70db1324fe9.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 0xb1cf690674139fca58b0a6e46b5a7d235ac7db6361be369286bc145fd93c12cd. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GRMT21600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ede772846dfc33ea5bc3e0a289ddb330742cacaae79fd64b570558a69b7613. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GRMT21600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f81cf781ccd11c30dd24670bb1ba9fab9ce3aac4d1799583c7662bfbcd5ba7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GRMT21600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9405b663f4784a1c77713c1f2987979ad2bc1616010ba8a45fbf46b5185117c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GRMT21600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24b9afb25f017af2b499e895a299a2240339dd6947223a4ab10c19957c875ab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GRMT21600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e5a705fea2c6fde05f07b9a381448f914cc3dadba0177c7f20ac6c5a1dbc5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GRMT21600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5782d0bb5f6b020bf4cca88cfe6cb8bc47898ea6ccc6f2e6a9fad1e27a7a4c82. 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/DEQ022007152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803790ec407b994be3faf7995bb4aa612d3def0a5d82a59c6f96a491e81f7e4b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEQ022005900.
Lost In Time (A Retrospective Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503c2ee071497599bfcad3ce8edffc86ed95075c9d527ecafd1d45702958fb67. 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/QZK6P2415248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3d284b264b89a9ee1c7234abcf766acf16502c158510166be9f5e673976af6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USEAX2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90e4e50e22e9f96221d4f91597d538586d9dd59331eef4048414458b38c5908. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USEAX2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eecf9dd722ce3d3de3ecd4aefb8e188778cd5a178ee2a5134f1002af08d87f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USEAX2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1731b8d0ca14604a166b9b9f0c1ee7cecdba86561b2f45748773efd5293267eb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USEAX2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ca11667e7a4d0490bf70d0bc5f32ff1761bec248755841ece3856fd6a93bb8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USEAX2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e084ee19b10bd9da1ef5d0b9d122dd36d4200695edfffb7b0a0a8da014e57. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USEAX2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ae7d324e1eaae5a3a1ae43edc1bd29815041bf6e52bc76a8e77f52297cba0. 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/FR6F31065580.