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 0x932c65a8c2377b1a2030d1a7c1dbfc4d5564e2630878b3d68cc4cea8b0555ec0. 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/a7393318-2685-4489-ab98-d806e1b99323.json and https://artists.proofprofile.net/proofs/artist/a7393318-2685-4489-ab98-d806e1b99323.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 0x194c560e7e029359fb1c8fe635eb8149fbc9ed6fce6f90029265c73367538765. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2401288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cc923f50c195369b3a2d99adf07f6989b4355c5a67ee7f289ced78a42af9a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2401144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde28c196eb2848d28e689121027e4167ca31e943eccc129d89ef7829fb3a02fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2401023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625c0dc50c5a29819542360b88cac2aad2a82b14d66b1a9eaa6ab6b1af70601. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19551767cc202ff62b97aa59f7edc1cd75165259715acc6870c6b5964d3d428e. 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/NLT2H2400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4530a2ca0665de9d76b2ee28f076b1807461340bc055666a8de37816d3820c87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d2438804e03c2b5f5f9b0251f92661e2914bf8010511b04a610a63235f437. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLT2H2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8853dfee83b7e8c926abdcaff5c4e858cac7b79a922843ee7e3506559319042f. 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/NLT2H2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5002f5d62b82bd60c955a43b364058a8d46467fe7c934c083c54309df1b84a7. 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/NLT2H2300916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb28015a495c19db82bb2b5e4eec34a26b1ba236ef3e6290adcba0ff8e2660f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2300827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a13afd589e086e62c3813e4c78b8b0551078043883197fdb3ca33df7a55d2d5. 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/NLT2H2300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef285b0cdda2d3631804c66a64698f2ba1144da3b77efa6e946e74ae19b247f6. 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/NLT2H2300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078c97e4977cb7002edb2fe8a55faf34d3beee94b57a63279bfc36a57226ce1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLT2H2300726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c40bc6111b13ac853d59690e4ad4de5f1ae99beb355850f77f2fb4597f9200e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLT2H2300727.
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 0x6e17283ba47ebb6706e4cd0db6260f3f91efd4649e560455c28b03416f7502a3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T17:10:28Z), 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/NLT2H2300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3e567c800600eadaeb1b22a868472daf6f94c712ce3c5986e9aa257d47c39a. 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/NLT2H2300495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f35b11ac3c9e7aedbfeb8937ecceec5ece1963e2ac504f8ac9f0c89a8d4aa6. 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/NLT2H2300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aca619debc65a7d4991dc90596b1b07e767d24192d0b757d1049347a34b051. 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/NLT2H2300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3804e92a0e05416171150e298951c96dbab43d197be928a04338c48788e504d2. 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/NLT2H2300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe58addb801de5ef21b5f41d53ac56e7601bbd00f6f85fb5f7cc260ccc6c68c. 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/NLT2H2300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71ecde68ed93dcd81a3a5dd8f9ddaccac9c519e85a974d43db1f40f0c1649ad. 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/NLT2H2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d0e54fcfb962dff89a2ceeb77a96a0f7a7b6a2467ad4fc594564987a8858a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce0cd80880757616e047751be4f33625e54805d515b98b6e3736a8e6d82810. 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/NLT2H2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bbba799bd8ac589301956e603383421141476776acbac4d501801a3c450fdd. 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/NLT2H2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d1d150cfb411f40cbb77589b029df53d34ebe17229ffc44fa1d51d6cd4766a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLT2H2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c289e7e10251506b4a43eade520e604937af448a22ebf582eae518b3049e49. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/NLT2H2200939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc6cd6d95ff694c4a76e3ac383367d938514d66413d69a953744b761e8d894. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLT2H2200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb19aa075d5299e2a5e7585cd4ecac5885aec78b44db9b6620ab2cd63fe354a0. 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/NLT2H2100222.