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 0x04c0b94158ecc5fa6dc378dfb4f864cee9c77c843e1c3b71269ab591264d9b5b. 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/8a2fdd34-2d59-4f64-8189-1bae1b62a40d.json and https://artists.proofprofile.net/proofs/artist/8a2fdd34-2d59-4f64-8189-1bae1b62a40d.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 0xd824b521ab482c8053c3d418aa978354c62de2e8f5c717d2878a19a4fa7e2337. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLB031100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed23eaf3bc458f9c4ce3cfc5655f35f5d4fb6197f12ec3e5df13ae8c5607278. 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/NLB031100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca4bd3c961d61116df856a0a4c883b9df466ad1793eb105223f26b096e86da0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLB031100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43dd07d01671d98c5d48a8318f7cc644196e28e6a5d3557173ea1dc2fe2b3bb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLB030900287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975e1643567cb1aeb957c76b30a2b7fa004a645e10a3046f655ca3a437401f8e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/NLB031100717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789f53fbda9ae3892cb1fb904002a8e0d8d1c16e54cc1598d41828ff9db3e32. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NLB031100722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fa1667a6bb2a980bcaca4470158adf948e2aa0caba28ed5a5e4b1223c3686a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NLB031100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f425d56a71f60136e256fc9de9cb8dba0e33ef1b2fd54845a7cfc5963a000d4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLB031100726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb57bcc04062c2a228bd67e32fde36e577aba74b969bd5d8abd5a7a2b48648b8. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/NLB031300208.
Rock Little Baby of Mine (You're Still the One)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698f56b63ff1fbf0f675f4fc04e29f29ce6c728e9056f8ee34d13efb855237e3. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/NLL6R1600771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda49123db4f7ba773674de0fc3000dd671b179ab824df77b9a914989abbdc9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLL6R1600774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b31fd0f032f4fe347b7b57c19bef614839ef742c487356b846a72ec4373d1e4. 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/NLL6R1600778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7d796422b434cc3fc5398ed7ec2de0b37fdf57dd41bea2254c4acbc0f02e7f. 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/NLL6R1600780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96a4589fc2478c9eb375e770e7a367d18a296ee755df166e0cace606c252a9c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NLL6R1600789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302bb5d02f3f845db7c1d5f32c0766b9fff1e4b0b850d7f48bf5f632a31790e7. 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/NLUM71500558.
The First Live Concerts (Live Guitar Instrumentals)