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 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 0xb6aa60a3d891fe00c26a0b49d139b94cff31d8978b7e6eb3015a79da2e2337f4. 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/438487ae-d8a5-4a22-9795-61b96b54f4a2.json and https://artists.proofprofile.net/proofs/artist/438487ae-d8a5-4a22-9795-61b96b54f4a2.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 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 0x37836ac7bf183dcacc5f67341126137da8d233f9f3dd96eb145419d0061b217c. 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/GBLFP2042812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17cfe1eb79acfeffadfc1a607d8a385434e77b6d83e61695bba21b67de625a6. 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/GBLFP2042816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3a84c08a97c7e7192081733a6966584c15e61eebc0f5a29de745443a52dfa8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBLFP2042028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684399ae2bb26859c9ec93a1f3026cf7ab18d07b45460a4171ba8e8e4531ff54. 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/DEGC62302931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48db26ac41eccba2bb7e40d5e70631818b4ff363cc599e4342efeb0750ca0070. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX282210854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3a84c08a97c7e7192081733a6966584c15e61eebc0f5a29de745443a52dfa8. 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/GBLFP2042028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998e4152e5c4aa1a46b6613b636ca761e6ff8ebd648581ed609acc7a9f41ddf2. 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/FRX201981936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e693dd2f8dc2171cbfbc5084a432077b6595f0cbbc48390c4ee9f965394916. 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/FR96X1944270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0681da03155bc181385f1b159cb8c4c7618813393199c057fe24dad6c2732357. 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/FR96X1985201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a4c2c511c47cba91a297f89d414bf1f57c7ee6fa1f21c7e242c9774835958c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX201920396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0681da03155bc181385f1b159cb8c4c7618813393199c057fe24dad6c2732357. 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/FR96X1985201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bb936904799267a5dd62f045f0191b2a1482a55dbde203b3c5a503b5f4ff4d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR96X1913594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfd2168e9357d06722ba305f249a49dac29782ab743861bf7e0af361394d20. 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/DEGC62302926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374efdd89bcccbb1b6895acbb58808202c36c89c391b4e2359c064dfde68eb9f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEGC62302927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23647ff1ee5aabd1c3a909efad5c8b54de5ca5a68b6b34b998fc74599f8e9f38. 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/DEGC62302928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfb040a767c7f75b39ca73189aa7be41ff8e5018cc518e73c5e5ee060cc4edd. 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/DEGC62302929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326c4a82d0891dd0941c77de436dc321ef4d5f951c26e9d48bf1eb18bb7fce32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEGC62302930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684399ae2bb26859c9ec93a1f3026cf7ab18d07b45460a4171ba8e8e4531ff54. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEGC62302931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3359add0d84dd395d4188f1589e3a4fa93c7463dbbaf95adea28f877459b0681. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEGC62302932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e76ec066f410d9e2b990ec0b328e836cbcbd4241da047194cb079e649895d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DEGC62302933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973bf2ae6c1bf988b1a6e470e26ff1d3af2cc1eb52e3276bff7ccd35333be517. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBEFR2309125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b433d49e76d155cd21fd1d919900d2b803ae88f2ec173bfd4458ee2b98bf57. 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/GBEFR2309147.