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 0x5b913061d9d05f344c1db7f3e4ca3dcd111ccd53a69f433fe1691125784a9efd. 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/d832c3a3-207b-45be-90a6-1e22313b91fb.json and https://artists.proofprofile.net/proofs/artist/d832c3a3-207b-45be-90a6-1e22313b91fb.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 0x48364874d544b195c7289bfb37c34c17c9599ad404c514eccd990f34afdba70a. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/USQY51579310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cfc36541ef6caaa00f7095979f699267686b7201879c6ed63eb7293e591c78. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/USQY51579314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959250872a28fda86dc0dcd96e59c61738862ed9095a62055cab5fd2f2fe952. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/GX8KD2435403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c0c06d34e9bf087bbe95b1c77543bf829b59c89c3e81937085a54d69faa01. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX8KD2429260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc15ae8246abe4e59735d215bf72cbe85ff12fafcb14b2bb6937b16630a869da. 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/GX8KD2431949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bf78a252a6c0734a9a04dff4dd897728a56dde42c1fccdbb8eeee5ded54d83. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX8KD2458354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c4e0f6660e016a004b585d84a4f88171c8a07c9c2d1f90a3b5cbced23ae8a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GX8KD2432726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6951606e2664a1738197d3ee5aada0455d937f2ae36e9287c0aec5501def8840. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:11:28Z), 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/GX8KD2421894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e026fd6932578cb573d9f422ec97a7c6b268c70ae685a11524685c19d5f5480. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX8KD2497426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4de808ab75f96a4c1644a59932d4ff7a31bf69c94fedf56cd77bd6be4d7610. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ZA56E1400946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81cac318ac5b8e5374decf5573397445e9f6b51fc30645f808c31df1556350c. 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/USQY51523063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4278dd40e1bf781b005a73bbbfb7a55e4557eb57827331d67180dddc3f102a1. 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/USQY51523064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36150e135c17e781732856656a683f83d3daee42b6a0644c7c707402380551e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USQY51523066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1520252e726ab619990657f09db9cddb2c9108ee5e4b9bd2938d7d85fd1562. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ZA56E1501151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66350aa4aaf1af4f8e8cc9d2214ceb430bb9d47c9e0b1b3bcddb255d1cd62b85. 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/ZA56E1501153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09c6ffcf07bdc6339fd4a17613175ff169a9f875572913b437054b60d742385. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZA56E1501157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702565e9e6833491150f7abf0d160473b734f78dc38db1f83261c0149236bcb5. 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/ZA56E1501158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931d37595d4126b09213ecc8a585ef1373179a8dd157db7c406c20fa143ca9b2. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ZA56E1501160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02adc63d83e317fdf08e9d47f368473fdf766365972ba8029d28a977dc41f5. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ZA56E1501161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211a3064338d239a91c282377cc12479cf475facb3b053029e05df0c3f39c76a. 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/QMFMF1530560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eddb67c8ea7c1c1f8c9059372eadd8032334fc23638024b7cf09313df19923. 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/QZTAU2443090.