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 0x749f9dd900396ba87a1c14184c316607e6c4fc2a76eeda69bf95b6e2a7ebe71b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/978db3d2-7399-4426-afa2-912a74dc8acd.json and https://artists.proofprofile.net/proofs/artist/978db3d2-7399-4426-afa2-912a74dc8acd.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 0xf40e1ab06064c20dff4d8abfef5a6e7bc4383a7213413f85837dbe3bcaf283e9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US4XR0757501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e0d9b7fe52c57c866375d2d6c80feac8000216d1ec569b096735252b593a94. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/US4XR0757502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6a4faa1e542f1a3fce596154471eb1f6c07469adb25c3bca68a7a2dc47dc59. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/US4XR0757503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce540b66662f4c2e5f908f7f872ca209cd766756edb30afd9358ec1b7127c9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US4XR0757505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6a14a908d61f2465a66af90b30e747faafde7f757ca6effd4b87918b86579d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/US4XR0757507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7dfc6091df6f9df9bd47f7698d69aa30d113b99405fc66ebf6918c5503842. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US4XR0757511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b9e969b3f9084c7354be9b8b63540bdf89f4e1906d3f8d1a0c17042bf266b3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USVR91059611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec50e17354805cad69802221ebf408a3bef08291e83e99224a25e91b3529bc8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1371862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ff8a035c780e9e14a7cbee155908ff0abffeb9aeae2272b2a936dc3749b04e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USA2P1371864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70d4cb88e58604461fbfb18f938b31337871f0aa1ecfa25fc07d000eaac6a6. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USATO1300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6205e36fba49a5359a13c953a5505f8f206ddc6cbf394f3890e653fe17784276. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USATO1300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3c807f1a0344d00d58dee6f4605fe277154564be36e4c5becb953c821e66a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USATO1300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd1cc1febb0e55af9f886a52ed94afba12dc2251fceb741d2f9dafb010e6299. 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/USATO1300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace7f136551260b0a8d9aff88140d525f49d60f09af7587a2fefaf4ee2166bf. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USATO1300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93461573e22cb1920422df032fead0e2a576eaa99dba51a692fa8e85627736c4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USATO1300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4707624ad199dd62c0ee06aec5c90aa15c95ac90255f9a01682e354dbfaa54. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USATO1300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bf2def3df44db488a572307cd5cc57489399d5fc8a3303bfdd16eb83bdad27. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USATO1300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b1ee803dbd0ff19f6f1d76414148782d5eb931c5c65e21d1f154b5452cf2e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USATO1300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70d4cb88e58604461fbfb18f938b31337871f0aa1ecfa25fc07d000eaac6a6. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/USATO1300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a1693ff46be176484d27bfb4c076da58fc024a6405d1d3b9124fb484b775d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USATO1300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fdeab413dcbe0a89c2e5ec45f59a08b3a82b73eae746181f6745da00ef143a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USATO1300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace7f136551260b0a8d9aff88140d525f49d60f09af7587a2fefaf4ee2166bf. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USATO1300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a69b7343b089b6236619eafe9e8ae47ec76932b5e125d2b8644d5047456beeb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USATO1700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b16d990382d36bfc91dc4aa529c1bd87f4718bc7926b1996285fd86856fba5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USATO1700261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd646bba7e14e6dd91cd1b38c95aa7a47c2e0032dc67af801d2dac5f85ea5cfff. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USATO1700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dec52f600ae80307f1d5bebcc5fdba84f70fe4c215667d24f3d37542f4882a9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USATO1700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2df284553125e49e32e14714930042024b6efcfca42edc49fc3a04209973b80. 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/USATO1700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe6d6282951dbbcd515b9ff8f6890b784893e09a88520f89d21c770b98597df. 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/USATO1700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681ef5bee2a6090d3bbf816b63f814ae9015fc7a331ab2522c239a36b63ecd54. 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/USATO1700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d631e009e1533ef21b221646eb7f9374848ba8e3c89a3c6e430323db77c6736. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USATO1700237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d631e009e1533ef21b221646eb7f9374848ba8e3c89a3c6e430323db77c6736. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USATO1700237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1f2110574f44f79a8b4b619990680bbaa1f5898b6855b0be10911d811ecb08. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USATO1700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa206b1fb9a1ce1caeeceec94af3202323fbe02bcac848c07c72208bc77a450. 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/USQY51049042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618f272a8aac3dc36b8ffcb30d6db5324e2279214cbfde7ba49a75ab60f2510c. 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/USDMG1573005.