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 0x41b4fdcefe47f46d904e1293cf4ab76198be255fecb234a2644644270e4b45c9. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e26fafa-983e-4b2b-9a69-2ce68866a259.json and https://artists.proofprofile.net/proofs/artist/8e26fafa-983e-4b2b-9a69-2ce68866a259.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 0x0d61784d4a62bb9d866560d65d4ade1f2549a2111c02a29a0e7da043428166b1. 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/QZNWW2475716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd93c0f9fef8d13e00f675b1e81d89832bf7675a9f4dbd1dc3aeb075724bcd1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWW2475717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94c743d755c331e40823f8987e17fd7f68e340b19a0d3bf2919365ed6d954a1. 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/QZNWV2490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3838c92e29da2b39c6a439a52a076bd1412754d9729ee77af5254cecb8e7eeb9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWW2475718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78194d6fbcbcefb24004463d55ce4cf404b5a45c4bf68a52be2c82822f9e3fd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2475720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94c743d755c331e40823f8987e17fd7f68e340b19a0d3bf2919365ed6d954a1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWV2490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5877fd9492ad4af46208d7fec50fc42583dab69711edb779d6a4f6710451b5a. 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/QZDA72489891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6e05ee15ad1f6fe35504e380990364c61c387671ffb995028353ebaf5b6a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFJ2306215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dffb30be178585d4e34b916a07e94027a0cc7d02118a7f51c11a55832f2b6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZTB42334416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8176b83344391fe9958c1330b8d3715c9ee5d418fb7c91779226c5ac1e540bf. 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/QZTB42336188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c110a4e0c495ece97a5ca112e02ab57d6434158032576010dd20ed4d5d158fa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB42336189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aa32c0ee4926210add5f22dc849efb2ce56594a6120dae85f16b2a5a174aa9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB42336190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be97a4bade97225600c0ff24de76252e03516285475bf1e311fbaf94f6b9099. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:57Z), 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/QZTB42336191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dffb30be178585d4e34b916a07e94027a0cc7d02118a7f51c11a55832f2b6. 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/QZTB42334416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685159bbdb0d4320ae8c12b1a64621d239d78c805116d1bd9bccd3947a5f7408. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA52319324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae91ef816521a59da62ad7b9214bbe4907219a278941667422e3bd3afa1964e3. 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/QZTB22202897.