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 0x4f9f07c2fd2194ae26ab4c337642618fc9320062dc9b9a4c176d68a0479f97c0. 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/8d4b390d-59f1-4253-ab93-534ad4e89a2f.json and https://artists.proofprofile.net/proofs/artist/8d4b390d-59f1-4253-ab93-534ad4e89a2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kent The Elephant Songs for Kids, Vol. 1
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 0xeb2a5f0d8cd34c1ed3f8b441087e6efc5d4381a1627f88be0b07492b8fa46a20. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM4TW2277179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b39c0c42cd893e64f2367500bb24b21a1724f892a3efb755f0ed8e0b873fc. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM4TW2277218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa17c444f27e58dd1fe9a76a0a429e343923b2ea5f3413b9888845e3e9baf22. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TW2277216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9965221673bf0bdd50fe9c80c7070212b9e3b19aba9580b2de58fdf0e32429. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TW2277197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e48ea252a19d567fa8abb4808ab064557d3311e5e974b9ae410f0cb7e13c5bd. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QM4TW2277196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349733c1809eacb92e0355d0f8f9b525e39dd01c356edf62d6829e797caf6475. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2277219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb76cd578e6fba0c3bac4cac472523e26edb46e13290940298efe21da3bfedd2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM4TW2277192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dc696900a40682ca8c35f060c5d6779aa4c44285838460b2ba79b4753e3a9b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TW2277186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f31abd561a33bd174b66bd1612cbc6f5515cbfccbba6d8febede704943f61b. 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/QM4TW2277183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf561ef29017d6564a5a584043bc32540f4cce91efc5b078b9029063b8a593a1d. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:21Z), 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/QM4TW2277185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7738748a0346189a3bab99945d17cad494bb098696a65367a8827dec5c91c62d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TW2277198.
Kent The Elephant Songs for Kids, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f50bbab01ce89d3823129cb2c3dd4371c774657f341b7c243e8a5aa47d203. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4TW2277346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7396bbbf68998ed00cc2cc084ab540fc4f487503568ec0ef5092ad104cb94ef2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QM4TW2277345.
Kent The Elephant Songs for Kids, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd2f6e926bb13aba830d4b489f62f5cf5313d217eac7043e127473b6315b40d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QM4TW2277276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcac7e04adc052c360f037f4e01efa1a6ad9f64cce6ab48bb9db8766075548d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM4TW2277253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb81149ec2ae3eaeb759e945889d0882a5267f17b95cd57abcc75804472ba9a. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:01:11Z), 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/QM4TW2277259.