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 0x545ebf4df438e4e44c46597957ab49a82873fef3b65677183c5099f48114c459. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f80bad83-82da-402b-a542-1d8a4dc8df3e.json and https://artists.proofprofile.net/proofs/artist/f80bad83-82da-402b-a542-1d8a4dc8df3e.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 0xe7aa32d687fb11159934d8e8cafcb68506ea11756ef5ab40f1cdf58b9b59eef5. 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/DECP50600173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c4e845d2a3eecfb841fd3bfddfa316924d26edfe402192da05fdce8cdceeee. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DECP50600175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa69712550955b797b18c0172c44ef1b5b22c2d493745b0708b904ca0aae200. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DECP50600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f372cb3465e9c4d67e7d6fdac58c54a369988df692a483bb19c96ae6e356705. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DECP50600178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5736ea6fe520cfbddb212ac0566dddb4de84749cba9f6deccd071856831b4ee9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DECP50600179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a784f7125dd1f5e3f6bd35d1c2904744836abcd02e5353af2e42cc6f0d5738. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DECP50600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a8ee4e0130fa5895c7152f1fea6398b0584225df674152a78e0beb2782ca33. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DECP50600164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a2f5fa27e04c4e908a331ef27ded7d7fc666b6c1b3d329c5292de3775b035d. 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/DECP50600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61829c7133be3777da179346dc700f47873773b19a7be8006530757bed3cd582. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DECP50600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb185ab9bfc939667060cf7457fbd6c4c7c78aab4518c0cc37ea114ea4f4016. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DECP50600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadcd355e571ce4391165077945545de85074a9b00162ace34c47630fe73ef35. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DECP50600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a6e8d20b7a28ac34ff9eab3962cfb347849b6a99c2dd0b0251b437deeb9050. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DECP50600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aea32bed454704801e6e9ae0c9675e5cb5da70edc50b6e02b31b718d4c051c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DECP50600188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082265dbc5ff0d96ab72f426dc7c89eeb3bbb0f72ee344ded5a9dbf2e6ab7f48. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/DECP50600189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a505968c8d51e3e7a5e5962815264de956a45b37254843c7c59fdb15cfbe7b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DECP50600190.