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 0x13891d500edda2bb670317d4c75944de7e5794459a9a20e03ba0da541a312098. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d63262-1152-4aa4-be59-74f654ced105.json and https://artists.proofprofile.net/proofs/artist/e7d63262-1152-4aa4-be59-74f654ced105.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 0x4da3eed3c26c4ad5e2767969b1344115b4cb86351bcd700a539fb876431a1499. 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/GB45B2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566b1646b026c4fa32e8b3968e84dd7a057593f707cb845340d6817d30bcbd88. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GB45B2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ab29d801d58b52039ce149d2ce9c466a6cf8c9873c2d0cecf6e4bd95ab0ce4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GB45B2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1638bbd58fd12056202ddb04edb1cc648134115c0fb9d027c9a59ad345f6d53. 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/GB45B2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b7b97f2582832b7b1838b2c686521fb4f754f59ec95d3a77ca8561c62eb25e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:34Z), 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/GB45B2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2f2b3346b9278aaf8ff9df99f6c92e8c6e4823dcdc3afb3323a817f17e79fd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:59Z), 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/GB45B2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1141c577ebb43122973a5a4d85802b697fd962dcbb89c575230e6719a45e9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GB45B2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e20ac7efd0b9916d5d37a63b5bb68c87b391e283276a14379a15838b5b3485. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GB45B2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af9906e7b1c97908e4f160367b32740eb5c8f42234a7196031995f43007eee. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:24:24Z), 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/GB45B2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b7b97f2582832b7b1838b2c686521fb4f754f59ec95d3a77ca8561c62eb25e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GB45B2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf095488dc99ac529d726288998086ce69e17af067d921123b46e1a6ead7fdec2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GB45B2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2f2b3346b9278aaf8ff9df99f6c92e8c6e4823dcdc3afb3323a817f17e79fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GB45B2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf041277825002c010a514e37b6dffa71914f0900b4b7490ae3d14ba1258263c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB45B2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b59bffc9eab761085efafb0f047518d365a1378b04a06441e26119387e81c3b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB45B2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3200a2cdae671088f4fb0e3578dcae809a25f2c0075681faf578c56d16faad5b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GB45B2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe510a9fe7575f685accc3c0949c0f8a28f92c89a3d9bb49fda17eb9130147f0d. 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/GB45B2500021.