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 0x17c430d31a4f8f78da22527e90cb5ec5300c1c1bc8716e188c5d564ad0b8d2ce. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94ad44dd-122a-494c-be3d-9f6daa11c31b.json and https://artists.proofprofile.net/proofs/artist/94ad44dd-122a-494c-be3d-9f6daa11c31b.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 0x46f03aa9c0ce56f566b5c5feae6722df745a3b937d7930fdb2b9ea0f89cada07. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABD1292623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3f7502a8435817f1e64cfd5eb785bbda8c3ce09e7493d744baece7bb00b5a7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCABD1292629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba941497bd83f6d19a4c64ce4404a13e8c43088c360b26c10ab81c4a84d5cc. 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/USQY51334764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fc590fbb058ea2f731dca18ae742889591a190b1c14269a0a01c379b77341f. 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/USQY51334768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0303986e4b09374f261893b0698397be8a6b9e170543dcc2b8099276629d9a76. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P1608473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c56c2011bb9df5099575c01ade8d70c104ae0284f3326e709fb3bf335354f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:40:35Z), 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/USA2P1608478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7828b45e89e896a123806ea0ba49748697a689d1c04a33a86b360be9d3cf2c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEC1912120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef5142c4343ffa3a3c2f0073338ac32dc5cb95327220956ffd05eb339691ef. 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/TCAEC1912126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb0cf849d252e0f88015c922dc71ff2320ad184568506c8f5bb12b14729b73a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:03:11Z), 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/TCAEC1912145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85118f152162a0c349c8680fd0522da533d25c6a491e0303d44b330d8d515970. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEC1912151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296dddefeed12dcf8af96f1038b081275f8307391c9b6f980940925701c0da8. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZFZ72514973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae0d3ae3a7c8c300b9025796fb4d64db6c08f6462b0e0713180f60ee0d89ec5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:30:22Z), 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/QZFZ72514974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed7fb08bbc2c4bb2be2ea4befd9f1c34fd03d76cdc4e9ca12956ce04b2fa05. 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/DKZVA1661053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9ca6ae19c84819732fbff3af06b8a24f18c7cf5a5d19a048bf4361750d1172. 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/USQY51418722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a16f7fa957d7d82881a3f47fbcab459a2d2b211a49c2cb1808b3b605c0d379e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P1659877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae46f0bec96fdfcc26592240593ee0baeafe9433886116dae4cfaaa053e2e262. 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/QZADU1708704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe199a6b9e9fdaac732168cf4e11b1b6c59454a2957ed756c832b8bd4413f22be. 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/USWS41212606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc52dfa70ddbde8ec753b69fcdd1ad0829f54723e25328494524aa6beb633a56. 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/UKACT1615473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892070e6192a9558eb9896d61843ce909c0efca8e6820ba6ae30393228a2ade5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKQU1785119.
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 0x0db2bedabd9e9a281e47b2e1f1919c22ae767dbf1a210884b129e7a4f63bd544. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU1770426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a14e7370fedc8d816a3d418b2a0e5981dd01be63dabb6e5b268b30ed3de5013. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBLV61500007.