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 0xf34e7b65e4e38fcfc7f3c546bb0935e39f7efad58965ca99d3c1bd54612be426. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7e286c9-ba0c-41d4-a0ee-ac875e72160d.json and https://artists.proofprofile.net/proofs/artist/f7e286c9-ba0c-41d4-a0ee-ac875e72160d.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 0xad897ee4700e5dd5618fd4146b8a58ccfeb42b817901d3c7f732e07b431fe883. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QT3F32427437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cde4920819483553c4390c88587e210787bcbcd7fe6c3f8b6f50e463b55f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMEV2580020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42d882e0ffddfa54906dab062d532a05fedd23c4c27cec74c59f43955adef16. 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/AUMEV2580027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96d24d80658b6bfd04e2b2cbd9eb8d20230af967e3fd8d874a72d65857e2a84. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:20:01Z), 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/AUMEV2580029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09625d08db99bfd73efce456573837393f08f7ae2b6419ced2c9c03fdf1a0446. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUMEV2580033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3191db165ae1b0ced5160c4304e174ce4b68228e6f00165cc466ceec4266fc15. 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/AUMEV2580040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d04adfc2c4555b4ae1c34b9723bcb81816974ce47beef42e03a5630bac0521. 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/AUMEV2580042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee69c820005b764bb0c06c973b389f6cb5139ae7e969038dd652f9a5a4f05846. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:35:21Z), 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/AUMEV2580045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ff8d00340f11c185c6dc6df1599f01897a6cb6d2922e09c9b26cc457bf730. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMEV2580046.