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 0xbdb22c87a1f6c060e899373174ab5c9e581613ec01afe9cf2e257cbf6483d15e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ae7c3e9-d5e0-4bc7-9eab-ba18b791c17f.json and https://artists.proofprofile.net/proofs/artist/7ae7c3e9-d5e0-4bc7-9eab-ba18b791c17f.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 0x23a54766d4356c7e3eba58c75db3e5739d88c5dd1ed2702dee3b6bbad02fd81b. 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/USHM81408507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5fe3731b70b2fb24a9acdd377cdd1155587d4e924c3e59bf55acf1c2450943. 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/USHM81408509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21cff4134431511d1095f87343b1bdc89406f2f99c062e1957215b823883ee5. 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/USHM81408511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198ca9e8d88c2fab4a4251d93d15afda6444ac6b91356d42698a0c3ced68d1d8. 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/USHM81408512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3185c6a7d8f54fb9bc077f3c07a9a30a27c81a3e192ce11a3332b4f31b2fa654. 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/USHM81408514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceef3e1a1b05cbcfeb11b1867e87230be48c53aeb889599ff8825ef09e9caf67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM81408518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801189653cddaa3746961458e33590bc7ce51cda09b6cbbf105521ee6804fd4b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USDY41819247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d22df9bca0a76a69abf005b470239da4bd488c161ef98a19c2e3cb27820ba08. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USDY41819248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fed599b87bda935a02c219f9cfb0a66933bde7d1fa53fee2952007c68cc87e2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:17:46Z), 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/BRFU72000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea799e8c1d5b22d88029922021b56a485ee028a09b982fd9bc26e2e82003af7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRFU72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff120d97acd582b4d8182eb0de23a4cf076aed29c4b0097edeb9701bd743471. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMZ92468061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe6ce0f353de67991b27d6e568a9670b2c632478ee97908df0be1405e94c11f. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/BRFU72500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b4cc34a9cc35c193a6b2de0c3ee1202d5a31c7950e8a98da751158ba8dc45. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/BRFU72500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f7a243c52547e05765b581c9515151e98cf92fc7809575a6d6bf0ebc814c0. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/BRFU72500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a48ac02eea2aaee8883756be4814d12168f8b0f66e3b873fef009ed269a1285. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BRFU72500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92cff2ab3d1db5d23df715c4ba6618950cbe1fe13c97e78f108a399365448fd. 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/BRAOC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae317f508ea2d13502cdb5e991978cbaf016b449a2f6ac0f0bf723a9a54af4dd. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USX9P1416825.
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