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 0xdcc3b760198374f90d82559b2d3c16c41425d134c22baa5d62e2ccb2ca13b0ea. 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/c4a555af-9545-4adb-b6c3-f4dd7f059584.json and https://artists.proofprofile.net/proofs/artist/c4a555af-9545-4adb-b6c3-f4dd7f059584.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 0xa5eb0c34ce3059c9699be6129dd12dcd756313fd39d9ef889d195b5939c09b61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM5LC1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696839790d68bca9cb59bfe9eacb238e09ebe5a484e1dc4ddac423fc758f5ce. 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/QM5LC1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e984eaff6ebf99c03548966c40f1925cb5c62b46c7de4976247a01967435c17. 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/QM5LC1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ab687df41ff7898281cd8bc5197bae23e70feae1e963c19de95dc9a6bf46aa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM5LC1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92351b5e825daa4d390b10f4cd3ecdd6f43b0fccf298143b76a1015860322a7c. 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/QM5LC1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb0c34ce3059c9699be6129dd12dcd756313fd39d9ef889d195b5939c09b61. 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/QM5LC1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13df54130343f9d2bb2997048f9be277dd11fe42ec2518a6a4f353d5d746390b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM5LC1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102c2d6cc5a1683819805aca5cb82a626356d84010242538f4a05d4b4703c19f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM5LC1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334968ac36e0f1edd7e933c879f4e5ebf165a046d996aec075ece8cba2286be1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM5LC1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6891d7186e13197e25067ae6ec67cc0e0f178cc76fb51056844145da24a7bc. 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/QM5LC1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa562619b4ef4da1e9ca9a5de7ba551bff94561818ed398b09f17bc214ab40. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM5LC1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a0dde2b0e0c192210f9d2d7ab7e1302a4ad3a419464baa83063e109a6e69a5. 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/QM5LC1601087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c3d6da2fd83026a10c980e4aabd0ac33047e3f36b2bfafccb1a482b29f4312. 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/QM5LC1601088.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1052444a9fbad6bb666b4fe38986a2e0ba3e18dd779741b02c4b8e0e32738ecc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM5LC1601089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12c3676b7ba3e6c7535e1ad598d357767c9a1a7ff3628e0403c51e86deeb665. 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/QM5LC1601090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7642fc6d5adf593f502946d46c779896e3198cba980649ecffa174bd64a32c. 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/QM5LC1700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c472258ec2697eb8e1195433f7b4baed856a0e051adb9ece8f88b63e21a4570. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM5LC1700072.