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 0x522ecc53dae3c5a42d9d8db799607e8ae9cdde3f1ce9808ec1e81de4ffca7bbf. 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/23a81511-3e73-4b58-98c4-1e7923c566a8.json and https://artists.proofprofile.net/proofs/artist/23a81511-3e73-4b58-98c4-1e7923c566a8.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 0x5a92d55acc55f9fbb63010c47e88965f23a59ac1cf0363be32f992049a1baa08. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EZ2414001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b69f51595c83bbb64d78484e3ca289883ec791f5b8295adb5c25e7a525def7e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:14Z), 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/QT3EZ2414002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93936429fdadd0f6ce29460aec0758e417e9fa8974227e3b0f7c1fabc1b1081. 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/QT3EZ2414003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13214b1a3079cf5c39a7b8a332eefc23dffe8ce08c2b0f9827ece1eb5ff33a5a. 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/QT3EZ2414004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9181a91020a0c2dd57ae151872fd01de1fde53040dd0a295a51245e5d665f13. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QT3EZ2414007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f667bdfc69c460e11bb92c26687bf194b828c53a52ab053a46ba8bdd4b40bc9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3EZ2409097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eb1801699e3b3c01db595eeeaa56327ea2dc1ab4fdea24101890313bfd5410. 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/QT3EZ2409099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9807846bd281ecbd31d773b15b5fdd40bb4124931c0a6f72bb6a27f5977ecf90. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:57Z), 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/QT3EZ2409100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7b07e6aeea5bc527d464f9b9b8bbea7dbc718dd4028e5a24aeecf52cac8848. 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/QT3EZ2409102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa513b828690c651b3f06d0100b0db8747d6ccf30945eb2844b664613b4c848af. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QT3EZ2424212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c3a92c5bc816e9683434a081336355abbdee0526af978024b11a3ae83abb22. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QT3EZ2422654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c405f651ca2c5fce3bd131867aec340af915c0f5a030eb20afa9e6f5e730446. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:25:56Z), 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/QZFYX2532246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c050794c6557a8a88cbcb842a0c0ea50525996a29abec6b096444895062e82. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6J2587588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd84333499ba6079c270b792aa1edbb563e1d50f8bb5d2dde0582cebacef28b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6J2587589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0fe20bdcab03f828e744cb327f321f39b6cd6546ccc0b15d833fc4db2dc0d2. 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/QZK6J2587591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12af2d744590942af00549ed1154aa39abe21e1c6c510cb0d6a38597a043aa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6J2587593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1444e74d785a33966bfeb9969ecdaa40a334ef0c2eff7c993aa5915a4f15085e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F82520807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea1d7e6de3817d5a01468bb2479e320e6dc4ef109a1e6349d8e1d57789ab2cc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F82520702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7ac9181338a396b787dd7884287970f5ecad61d3ec27f6b1b51297fe8c5bed. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:38Z), 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/QT3FB2543280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb63c0ac353e6d01a9fc624dc6941386f4628734e6e2baf71f18f7a4e6d692. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:08:20Z), 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/QT6ED2571346.