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 0xb593f035b29ce1abd31c37912b9b996d544f63d7af4c5f44d75ae2a09ab6321d. 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/339ed027-d568-4d07-9d42-0c3825a31c03.json and https://artists.proofprofile.net/proofs/artist/339ed027-d568-4d07-9d42-0c3825a31c03.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 0xfa54ca51c66ad2d225e32cde488935eb4cf3bbc9373303b57df7dcea974e4372. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLAB20902950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7da1ec5f738d90dbd47512ef3729d30fef6e9edd3bd92257877d81ee23f26f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CLAB20902951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4858c62920400abe71df6870e3af4f5ffb7a97ed28018da5570bf6871c9453e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CLAB20902952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585838d643b27e2b69565f78f0e3a87da29faab212c9659c0d119bb9aed9fbc0. 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/CLAB20902953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cf25eaa99839de2505b21d2ff6449414b260cabd15fad71d2e2b1d72a5d172. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CLAB20902954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd6217213344da11eedcbefcc14b58a75f9641071a358a23f71a8a5a32e4e70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CLAB20902956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35de9dfb193917b2a691e74bd9fe07a0e9ea0984c0698f2d70ec3c06d8b1c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLAB20902958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773c9dc1f995ff5f2fbdc21a05fe67056c76af99dd63d26ca86875a298754a1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CLAB20902959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14b773f299702826ba5539fa1fb451d38a5ad0114ec5f34dac84070059c27ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CLAB20902960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a5b61b0bbcf027488a8656263af522de100299ae7806f197e5b64f79c10a1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CLAB20902965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbb45e1c937e961c26b586d25a811fbbd53d5a30ae74ad67a8f0ee260f3067f. 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/CLAB20902966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740acb14d72d9c943a05d6137f4efa6e2b8fc04df1d8388b0059ea4a39b4e6e8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM6N22287603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f29e779048b35d471f5e627a78d5e20a39ce5a084caa9af96d5bf872d567d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N22287572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4d53583df4391686ebec43f103f3bf6c6cc65341ea8af4e461b4c72fc14fca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N22287576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01afa31101bd872ee3793b9ad88a5ad347c91b4a6403365eec4310e8883b068. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N22287577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9205ed61c97a98c3a34feca2963afd8be06fa7325d8fc21ff5a74708a7f62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N22287578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75a953a38ad4621cabcbb0aa01ab49f3a790089aace8062058d15276642de16. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QM6N22287580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c3e810c9c4a0ba0cc958b0e5daa9856c33db7aa932bc0163c341963ac7be4f. 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/QM4TW2160336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32bea3d9312b621a9156012836b6643c78e2e6ea70989407350f6f563a63254. 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/QM4TW2514668.
Dj Pinky Presenta: Megamix - los Mejores Mix de la Música
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496536d4e6449274ea7a7f4e3a39153a9c96067d90aeca1cab52549c2379edab. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CLAB20903338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd18583d956ed2bab9e2f3e05c3abb9cc613268409fa3eaea1b15321f489a13. 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/CLAB20903339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d2047a95c03ddc58d0d3c1f2d2236c237d2d73582fc1232c762c72094efc3. 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/CLAB20903345.