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 0xb655a45a00d0e678d1e5cbc7c5cb7cec2e47b0f2a24327921ac542f838f93a2f. 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/e70d178c-12b6-461a-956c-f0b8a8116594.json and https://artists.proofprofile.net/proofs/artist/e70d178c-12b6-461a-956c-f0b8a8116594.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 0x6203b7a010a7f8d84f1ec3b159702981bcb0aaee40dd47bec24922785b4c8889. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE5BU1825709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab6b1ec35e4542f0328339afb8fe60eb3f816bee2d1ecaa240b75fa507ed502. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FISHZ2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1873f4ff13e25dbc64b12b62ab7a6373b67ed63777f0d16605e53467d588ce14. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FISHZ2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c04e0024200b67289c6428586ffd9ef7ab4dbde9a009a1d152618ddedb2051a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FISHZ2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c739b9f738724727e1726e4238954eb65a3db77d550235a150d7f4c5ab044e2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FISHZ2100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd85e0e8074906eba3f79b97efbf8d0065fa381bda65aa516ca1e02a188e78c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FISHZ2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2320b3ae5f77bd048ef935b09ef278db4ae382a75fb6e2e316c25c4161a14317. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FISHZ2100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278577981948bc94caf0ff77b59be03010fb19211b224337649146e76084c0e4. 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/FISHZ2100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09523782e0b9d51d8e5314a04b595ba7ae2028d370673ca63ec0051e3d48c8f7. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/FISHZ2100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3ecb1b167b39a0f4aee1598a5234ac5c564fbcd53dda4fe604de7d9543b61. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FISHZ2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90ca3704c3de9c97c65da459bc53787d742aaebbb82fc3bd9febbb9f093da94. 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/FIBOA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d214fb86d4f0cffedaa84cf7bec68acc8293b30c49bec95446e8fd72511776e. 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/FIBOA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbcb37e81f7275025e744bcf0ec6731ef89d709fe01052286e9dbfb06ad84d5. 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/FIBOA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72230163112786a90ce05e914ae6d55861b8d8ca3106be118e63cfa856240383. 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/FIBOA2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa7b06ecb02b379f02e518f76e16e2e0c180f487e49c07b9d59a2daf6028cbc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FIBOA2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78f4ba4f6c4feb17f6bb3d2cc1c9d95e4143f4c9e9efc747d3b92106e0ec381. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/FIBOA2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec344c5e83482118ec0b9de4ae7608743d3db8cb06e7cb0afe4832353656a446. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FIBOA2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53721ac7389a1caf8155b46586324d7ae78b63eb0569a8190eb1dbc9ca372af0. 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/FIBOA2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8bb3d1f98e0456d5900716170079442ea5181bd137741fd9695204132679e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FIBOA2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa7b06ecb02b379f02e518f76e16e2e0c180f487e49c07b9d59a2daf6028cbc. 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/FIBOA2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa91061ef54cc8a006233d7e9e0fcce8282eb0f0ee7966be8372ed0a7ba95bc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FIBOA2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6a4d01c9b98250fa44cc9a11ac17f976d1f9079a60eeb57a0a746159bd36c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FIBOA2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741674e9a62f85276ae8c845c7d3e7779e9d0bf9f551b542ec6f313bbac75389. 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/FIBOA2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf8e0384655e7a2739ecd053917d75beade9ae57a9ea13c0e5e195604744249. 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/FIBOA2500039.