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 0x0af26bfe34d560a79c9a53ddb8e5a3d68094a50c585d4a530126b7a4650c5e75. 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/3c847eb0-0db1-48f2-9c5a-dd513ef1d6b9.json and https://artists.proofprofile.net/proofs/artist/3c847eb0-0db1-48f2-9c5a-dd513ef1d6b9.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 0x304693b0dfea952e7551bdc835fb6ba1d5890465e0a24fc4113e310b13e59a70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU7892043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b6af180773df9b091bbbfb4a926256f1967f1a2bcee8531dda664108f65f2f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GBSMU7892044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea243d53c9a6681a73bdae2b9895ee1d1919402a3e7969e7b7ebc77f73dc00f5. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/GBSMU7892051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae62e89ef7c59b5705199d630967a3a1d982051476cf32001e250b156c3eea8. 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/GBSMU7997256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad9e524f2941b514b9b9e9232a81bd7a8231e9638cb77c5743a4b5930a76599. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBSMU7892042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2398572c3aa932d688936a6f0e405c526b7036ee3a34edc14b5502672aacd7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBSMU7892045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f007a52db514df6f25ba4202d8137cbc6580feedb94ad7f2edaad32293aa8. 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/GBSMU7892049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1bfa26ec2c1a4d0c1b47334baed9e5c7df2d4fa3685d94c1ab86ef708848f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU7892050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58c4d431adef65801dc82a2d4633a5f0d0bab9b46459c733b13abb9a74b2ff. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBSMU7892052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deffb8a346fb16f86d4769731c8fff7fb3b3cb58e4ffc1470e9780b86c54beb. 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/GX38U2100909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d168c21da57c90682cb3c8e8089d38262d4d0382814f4b943e2edcda12eb7aa. 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/GX38U2100911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11e949802d549974d1468c7b3c1e1ebc42fa48277784883d9de1768e03f3db5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GX38U2100912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2340be0414ada3f9a2fb4b31193f04502ae553c041ef33bed8fe5f37392d1620. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX38U2100913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae14002f4d4167eec853a78789260dc07ffd6b4a9d8255456c9b45e6429cd8. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GX38U2100914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d168c21da57c90682cb3c8e8089d38262d4d0382814f4b943e2edcda12eb7aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX38U2100911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425d9043c71999d1e54a8e3682d3c281a1177d495034fe797ee65df6177cb653. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/DGA052291792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7646f8e41769a7244ed168ab89e2613b534ec89c52fac2868b1707eb7f00fb3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA052291793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedeaa2c198c2f1c5a750fd8d5cff5899af9784d1006e79087a7085c356e495c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DGA052291795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8970aff101bf38d55ffad86d6b554e4bd85c3dc981678fccc4f1b4b397ba6c. 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/DGA052291797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7646f8e41769a7244ed168ab89e2613b534ec89c52fac2868b1707eb7f00fb3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA052291793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedeaa2c198c2f1c5a750fd8d5cff5899af9784d1006e79087a7085c356e495c. 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/DGA052291795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8970aff101bf38d55ffad86d6b554e4bd85c3dc981678fccc4f1b4b397ba6c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA052291797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c3a4925d43f57a3edbe950b5786a694751ca9b94111c56882cbc3e2a4ebccb. 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/USA2P2450998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2d46516e2d24686d623d2362c80081b445eac206a920e7775d72e95c1ecdb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USA2P2451000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b1fbb80a1e5beb16654c402cb1fce36510bc2bb4cb5108dd232fae6951d6bc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P2451001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6832a334f57f559c3d35351f9e0eda4097f981aacb0d5c13dacf001df52419d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2451002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb826142bdfba4aea0c0d71db726c6375b7d404740965844a7d1983019f4b582. 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/USA2P2451004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf204d27f1c2f9175d255259ffd635eb8c0587024cc5863891f2c66b2236f232d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USA2P2451005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd21bcb27d5a3fc73d9ae12d213f328ce0cb6659f61b2a386de1e8924a7766e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA2P2451007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee6a1bee3eb6a6ff09f4020d47fd706ac3d3adb3528fe53c890bc0723559200. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/USA2P2451008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cde3377afadab4f330d453a634f2ab50f33ba93cf5f5f3d2849260cad6d116d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USA2P2451010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb832318ca9079af63001d8186c4667fa27af29450247bc7e69958cb693743e0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P2451015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a2dcfa01e22502da6ad0385f5e122c14e815419b97ff2722bcb273fb93a34a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USA2P2451017.