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 0xeaee8f18ef7d9eb37319cae42cbea2200256f6ed514ba0f5b5e4af719f77f6cc. 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/947c9169-e7ac-46ab-95bc-f4de1955d417.json and https://artists.proofprofile.net/proofs/artist/947c9169-e7ac-46ab-95bc-f4de1955d417.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 0xc14d5cb17bdeded0b1e5f3ccaf34762e790f33d884925e68b7dec4071e1df959. 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/USQY51069922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53959b1afbb57e1274fd53aa47455fca3fe9b9a9703f57bd90813eb3f546efe7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51069926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68fded3a9f01d6b3387f1c8a50eeaaa29dc6097a7b4f750aba9970d49f1c1c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51069927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf660084c0b214d3856991a81348a818632ed09239045687e56697580ad3d30e8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USQY51069928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1b10f383e35a9057eec719f60243875f7d069ef75dbb79c9abedcc3a6f7160. 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/USQY51069929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1172823a9dec2da8dac47b86d71fdd87f30cb1329b000a8810205b676ab25599. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USQY51069930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dffe39e8a19642dcf9b81857eab4e1360c6445ecf03e77ab64c7cdc8e533dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51069931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a9820e0c17272e09c47333a628f8358934710811a24143c91a165e90f35b2. 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/USA2P1005416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db9c1eff6dda111b0390fdbb43f1fe86fb1097749cf09a8547b5b4e01b3dd26. 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/USA2P1005417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5520efa93dede4286078d95afe5a8f34f6f9ef49f91409400048aa63219f3e. 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/USA2P1005419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a05aca751b5960e3a257a5b47b2721cf3ac5b10be2c19f33b9aec4e48f086. 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/USA2P1005420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03e132d44e98cf0931cfad74ada932931b083656384118b248c052738be8c77. 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/USA2P1005424.
Come Thou Fount of Every Blessing / if You Could Hie to Kolob
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3118e1b88875303786bf121b5540dc04ada5f5da4e4fcf9c8ac2e17c80e4481c. 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/USA2P1005426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4064917ed784a98fe6c784ad75bc83b6d786d8ab84bec134550db349faec577f. 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/USQY51156961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292aeed83a7a6a3273dc4785a196dae85e301b29bd517af20f7ca90cca427f56. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USQY51156965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb16811f66afab8b2a07891ce9ad985bb0c091d8a8192185d0d7e9742de93ac. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USQY51156966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ee15c6a5cea0266676ccf86ff607fc59bc49d9ba62d7b4b4e8dbec280dc767. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USQY51270389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe03e1f52a0e364f4f89fa0856acfdbeddf54dbfe3fa056118f7412bac77748. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZ8251847186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed234fcc93f35e607f23de6eb9a8f224fde2a504ab3aaaa643157f690a7fd47. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZ8251847188.
Consider the Lilies (Violin & Piano Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb030a9d57868f065c385e70e52a70b78a07dfc96c95ef75e9770aa5ad0eb303c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:22Z), 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/TCAEF1999149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee27731808d5ce69647d15a03e96bc5b2f6edd3f1316830c5e289ad85b9507. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZ8251932620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac8f99eb66b3921f8c6a9fa51a07db2fb594d5773001fc0f0ed49ae5cea5fa3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZ8251932621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5abb3ba4054524ff811f012275116ac90747768a7ff76af92cafdf27506cae. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZ8252011161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49725ed9cddee5dacf0c43264113a878ba27896a58a930cf39d1fb162e3a295d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:42:34Z), 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/QZ8252011163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d833a6548acf4a1eaea3156682b41097cea8d3b7c15a79f1034bc530d37bfc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ8252014292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7d31c52021a6cc36a25d7db296c3c663f37d1c66d134e6755ee46fcb5367bc. 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/QZ8252100560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0285ce5ad6dacc144b79bd7885d0e4f357d59b4b0834a462eaf4c9a104572b00. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZ8252100561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ad4f0ba173e137e0eda837134b87c23af42fca9552d451f1286d0f769ed1bf. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZ8252100563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa16ea239356cc88dca6759ecb22422be930e1e4783b21d4c17100adfa196b39. 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/QZ8252037636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1de60bb7493b3ce7febad70559ec23ccc55981ebe345cb8c331b1293f53467f. 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/QZX882404761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bde0b8e689cce4bf5956bac9b1903cd9fd03f6b29fb0b7f1e4790ca1961c5e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT4K52561902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd907d24ed662d2226bad8e9b48a414c40342d0b6ed23a849229ca3e4df530b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT4K42502346.