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 0x96d010d75852dfd4884a989cf4fb7fb0b2952d7dfb72d349ec651ee2d73d45c1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f113a5c-0c05-41ea-aed5-ecda3cc73dec.json and https://artists.proofprofile.net/proofs/artist/6f113a5c-0c05-41ea-aed5-ecda3cc73dec.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 0x44a2bdb0070bdee3870daea8e23e27bce0634c22f94da28ca33ea7fd217ad13a. 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/TWCC32303081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061519281231779dbf36f1b6fc69b8c8d0f57b1530710b7bc7486b55b659f64a. 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/TWCC32303083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3685debbef270ee5127cc8e824a74749c8ce2b5f36a2b559a9759e5ee6771fcf. 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/TWCC32303084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b531eec15f25f2b68ce8dcff40b5ec682b58173a5479a5083b4d833e7d3cb. 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/TWCC32303090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72abfbd7dc9a4979e94b43964635dd206eac345ee5c65956a5b5ae94e0d3b9fd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWCC32303080.
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 0xdabbd11a62cd4c61be3e7ab63474b6fb60694845ca4f35b863a1a0ffa0e0c50a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TWCC32303088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfab408d63244bc2646ac68df2d5b66cc5862c7f4ef392ace04fc15c0a5f320. 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/TWCC32209431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d832b9f11133fc6e060f81ab4fabb3ba58f0f44fcf83fd10b0d4137736ab01b. 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/TWCC32209433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8164b922bca04c09fcac0268b3a1439c0c7cce8a551a9cac361ba2ef6484b591. 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/TWCC32209434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec001a4a7a81b4b8e14c2ad7a65822fd5a4cb44b3b5fcf1f27b109268e27a4. 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/TWCC32209435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8667954cdcb5958341f99ea2a6035614c024efcb6d79e4c766e30f6fc2979e51. 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/TWCC32209437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70f486926c416ded9455b1ed236662e10473ccdf598f489a0cae02054c6fa42. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/TWCC32209428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5beb05340a71bb5b343fc9d966ee61b5f3dd2ba0f4dec377aee3b0a81bd96c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TWCC32209429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb24bb17358975301062b04d123d4c936601e65bfb814d846c3d14f9ce7b3ba. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TWCC32209430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a8324e066bfc134daec24f18647d564d1836cb5d7172aaa8d555ae7eacef5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWCC32209432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e579872b941c8f3f08fc0b2e2e231d5aceebacec2f0eac826e823428c1172. 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/TWCC32205440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2bbf348a2e5eeede75de9e664ce87a7aa147ab9c4954603ff8fc111a1e8d3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TWCC32205443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b3201f68032bc985b5e4f29daa7620821ad3295942ad25b8dcf0854e69b604. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWCC32205439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd56b77bdac83d45256170f1428b486ca6352dfb45bdd3b3a5827e5222243a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TWCC32205447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211cf466620a4b0fd83725e2452222ed2c45736d4a77599dcc0e8d84441de1c. 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/TWCC32119602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366eaa1522b363a81ec8ae7a81aa94535fcec25844d414186040e4948d2016f7. 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/TWCC32119604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477b3c53a89ac7838d97101cc5b7b906a15293b907fc2a2920874cc76e7a81a9. 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/TWCC32119610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8edfb936489d9bb73abedc00bf7e7003b53bfbb5f3b10f6c9685d2f0f05e3c1. 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/TWCC32119611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a62fccc633dfa439d47987288e02de43a7b46ced159e0ec7bdd639777a3fd8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TWCC32119603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6288756b1354128c4750b7920fb23a15101168c775ecf2276566064a1f86792e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWCC32119605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700bbbd467ec4362e10d16d11d70b029c74c4d807385a3f35061e98bcbfbfdbd. 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/TWCC32119606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dec6897c4c4fc0a221ffac834c06be282b7866fb8d07b1528109f1c87d735e0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWCC32119607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91322f1ba6716b5cd3fd9ca4742adbe2e3c54d1f92b94d57e1249934a0347938. 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/TWCC32119608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a83b74f9fbd190d91381efd866d90f8db1af5d964800d617cf5487f0b2576e7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWCC32119609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af49562c3697620f6c0b4a0e7301bfd0b6e850a324736ea4fbc070ab414876. 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/TWCC32122767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4b9acbedce62b52eda12c6b7341e5a55041dd68c586e46c5eaab36ae508637. 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/TWCC32122768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a830f98cffdb76b6c98c7f0b102110f5a898de4e3f5e51b66e54729d3bae46b. 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/TWCC32122769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38229a3fbca4ca5539ce1889ff09d9fbc71204edc3bc431becee1babe0c39bba. 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/TWCC32122770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17867dfeaee0a967a7f699ed95ea0bf347bd966f5f84667cb00b4ae12ef61d6c. 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/TWCC32122771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036ad5589979c15828b09d72f6b605c37fa26c7775a79e8d5e71c8d03f45f1ac. 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/TWCC32122772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4def63592c32ec2f0ad6763e9299a7360a07eee463ff9c7bd5b27f857b697a. 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/TWCC32122773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad97885ff687c2705c8ffb45d9e91cc8e4cec6b40b2b171ada8a660fc545d4e. 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/TWCC32122774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca259ab4ed7da2f78f099a9a6eade499d9a5a57a8e4b0953dd6800f87177827. 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/TWCC32120908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04130ad79c7c07bc655b86dfeccfd992801ace16c3750db2ad305effe6069498. 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/TWCC32412847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bd7d7439efcbacd71769928c5aaa241c036f9af95a87dc94fa3b863b41a574. 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/TWCC32412848.