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 0x9be0a3c63a68c731c764fbf02cdbb48902870f3484be90d5d60c6712a1672d98. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98d643a0-327e-4635-9817-318a1f90dec9.json and https://artists.proofprofile.net/proofs/artist/98d643a0-327e-4635-9817-318a1f90dec9.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 0x16362be5a76199a397d7b07456a63266455c08adfd45aeaf128292372345f020. 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/QZHN82408369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab823e6bff8b1c3c69519c535fabbe13a0d1a5f94d41215c0fd3d514a4669e93. 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/QZHN82408370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5967f4d2fb7319c60cec0168ab6cc9e9b66f0d74295a737fe824b7c24812b1fd. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHN82408371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1718963a8f6dd4e8ef8a7170e0e9845edfec25e38ef98ee26778626725489abc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN82408373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda42f4f352bae3361b080424da555a6a9d2ce26b25fce147311d4c976705cb4f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZHN82408368.
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 0xc94a923e58ffac9fa61088562536bd7c5cf42ef98833e1f8583bc4334bc47aa6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZHN82408372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2485f7abded3dc2d82eb1b6b7b6b7ffbb550762a3a4f6ba60245c0ada176b0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHN82408374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f80763856b5c96a8fbf5c083775798f6592af6305edebbce1aed73e6356496c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHN82408375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1e8ad542bcbc244bfb36b26eaf86ab5765fba4539be9533ceb8b5b953d74f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZHN82408376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba002986d7c0953f92a2aa1d48f30cdcd40c36bac8b22421fa0bc508246512. 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/QZFYX2411515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450557e226b203cfd45f5f8da26b4acc923b969099e4ba84806093cd01670711. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAW2375397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb247b807589fe25a26a1f6edd2438b64c11b89d1d5b8c5e1f04b27b531392df3. 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/QZTAW2375398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf5f70abdba05fd9fdf6d7c0da7be496d361a83a462f564703f7b796938bca0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAW2375399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94621daffce615144265e3cd33891b3d3247456b64ec5d50a067f4588bd7b35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAW2375400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe20e4a8de0c5ed6a6ee03d5afea0d59339b2e03cf22a4f68b123c0fc96d800c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTAW2375396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af85d9904fbac678e3df24ad876f3ad0d28c920687f8a03e33e49bf35aa2601. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZTAW2375401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf839573795a87e16d0d0bb9dcf407492bc1b7f9c0266b791cf356c7dce2bf5b3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNMY2170869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b502c9b15140ca035281e3bdb24149535ab1fbff820a6ef2e947bc566962a7. 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/QZK6F2182935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9162daa835745419c7b93ff5904d96ea70c5456183addebb98d513b95b3f8c27. 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/QZK6F2182936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e8d0b559b4a16672b0a2baf3fecfce88869e7959f1feeed8b65d9539f3c7c. 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/QZK6F2182937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d314ad6cb3b9944a149e8353c02777cd65ac364e1b0cf81acb92355a804420. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6F2182938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed658c3cbcf7ef3b724c69956415776a149e339e26abc549e9ce715435ba897f. 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/QZF8N2185782.