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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf3584cc782014f272a860e3a6ce6613f465845706d8ddf5ccd4a420e3b5e73. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d998386a-980d-4f6d-bc3c-3953e65bfc3d.json and https://artists.proofprofile.net/proofs/artist/d998386a-980d-4f6d-bc3c-3953e65bfc3d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e90be6c019b2adf2963a96ce3db2a0f464ab27e55c813401058cdf314f6eac5. 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/USA4N1201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c567950964909d817005635331b3f11c1d84e23cd6a9d945ee2cce79de96200. 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/USA4N1200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa024d44c9ee7c95922ad7cb845b7f3ce4b840e207facda1099adc721b72f9880. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a7f8cd9bf71592fe71e9122e277cce668d19490587799cb3f18a7ce0c01645. 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/USA4N1300875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed609a0265f8093c68dd336fccfd4f2e7444567a7bedbeed5d8ad7aae3fa2375. 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/USA4N1300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac24f5da74a945552aeb63d55c1d4b30eab3d7c2ea3ef71957d9d413cad7b5. 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/USA4N1200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5802406b865b9b0dbe1f95475912618ddabd4d70d65db8816908354760b9c443. 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/USA4N1200970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ba3b98669aa151724b8c2e4bb51b206ae4dba15c490dc1c31e2c0a79875714. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA4N1200497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50ae852659de8cabc737b05e9eb0b83c7ce02501767346b5866d96732bd8f76. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA4N1200496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac5c25632eaebb4d6b6c451bdf5fd0f5384c9b7019d3c272c4736f449dea103. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA4N1200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82fcc5f1bc2b5ad2992215fd5ee97279efe8fd20dadd7d9f836b14626d16ec3. 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/USA4N1200959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7bed092822136a7694eb4f84e687e0ebecaa75a2b1e7cca853d02a19f7f3e7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:04Z), 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/USA4N1200603.
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 0x91d14a1f8afa8437508e4e172f98420238483ca5d92e7ba20614b43b41ae0de5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA4N1200605.
Sal de la Tierra: 50 Cantos Contemporáneos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf276cfe0f9d9d0077c9cb3767e53b810e0a2a15b6918b7b807c4424f0b5c2d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA4N0600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd667fb23880bb644dc36b9c450cf687cee55247bdba22e8e4eb237aa58813137. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USA4N1200492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84bc027fd0d857e4a1204d8f7c059ec8d686395ba5ff948ac3b9e67c77d6fd6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA4N1200498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc28a11eddcade79543331066a21019df429ad8113be126ca93325886e1a95. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USA4N1200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430555ab9e0648bf037517a154248bc5e17cbb060a1928b1e581e15c580ccc7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA4N1200493.