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 0x95d19cd22bba66150c3e0fdc0d5cc8f142d7082f1a47a8d768f6c105036f8b51. 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/e030e2a0-a7f6-4535-85d9-6a78b600b2d1.json and https://artists.proofprofile.net/proofs/artist/e030e2a0-a7f6-4535-85d9-6a78b600b2d1.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 0x43e06d8b8433ed905fe789b8e34715f806a0e79dc4d2efe788ab3e66147373c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQX92204766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40c1ce8a863fad83fe9d3a41a3b4e1235b9ffdeb54a19f01e9faf5c8f95f1f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c42f2dfedca8fbf9521f2a910b25ecb6ed2dbc1395c32b3b5c0a406ce885917. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e26c7e9f5bd498022ccb1b88ce0ef7f7f7a1df85e0b220656e9013b6305929. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9848b466e52b949216cc6a0c2fca4c950d3ff4dd40af3a7ff12b7d0d4346a58. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eccd37350fdc8af3442e45a980f58ab9470b21d22336320107a60f0ef3e91c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7bf547f3d4ea5ca9cbe3fab2fab9dfe558e997028bd1fa88434c4f092ee3cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefaa5cbbd4b26f29ae87463498c16e7013c119e2bab79003b7431456709ce2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f4886dbf24667fbc057ac9e3ae32c64763687817d773302c6aa0ae911502fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c36c9033110e75a38964d3e273d6a58356507e93b148cd8f4cc9c5478fec8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd479021f4f228771a673b0ffea7215c30d67e208ac4504f581877d9fac286561. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a5e9977692308097868bb00172688df962e1ef0d6bd97ab4d667c0a57862e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f972f26eb06be60dc5da8b29adf3cb79065959a921605b07d3b241040dcb107. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59189d2584e38b0233c65aac40310933eadc5e2123a76929d62374425bd9aca3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1b9b6958e914841c50c962255ffd404403a83dad1d9c0b5b440fcf8fea0ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555cb149dedaa1e77a686796125a864260c0f795b3d53441a8c3adf6103b1736. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0625c11a717fc54aeb5030bbcfa8e92946787320f3ecb1585ddcf72eb884ada2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4825a5d6b340003a33acd067c548dc4ee32643db6a1d62010f0eac66fbad4c27. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42023304a3cdd111eef76db1f5a1eed4d877cbd86fb915f1d84dc1a8cfb5e59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2337078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bc0f5f02cb95f88523781ddd35a286deb66ff3681c55dac5096958d53908cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80209aae59485355687ed3f584e7fd901c1e638d08e0a9eae54020685920536c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf3d51aa3dd23ab60fed656ee80d1835e1e27e4f785aaeb280f223865467cac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdeb6da811057a01e31eecf8276a40c2a57be7a2f9a53e9ed2c75c571f47fc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b69d6c91300ee5b984ffd1b54e3a883717052455949c7ad8a6dbab7db69757. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ea600497848a39dad29b46eac9929e4ebbb36bdd252bf0b0869431d2822ff7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e56f54992c943c85836c51addc3452b1ebfba9a0851d53397ca49f69ced549f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6H2003943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1f1e517f69a5013b335d8aa644bcced463f739c126e14174dd1fa2e24f276. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2349443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65097835cd093f0ccdb8ac4bf7f22d74d926313e02f09ee1ff673971c156220. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12302400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba587024a2aa9a24e5ef41300c2096717afcb493f636c0c47c33c52b620629. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USE7D2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc553254ff9779c209aaa2bb300a9ed42e528b7360c0e70d425d4116200149fd8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMFV2000280.