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 0x54f94704c63c36ae68e2bf9874deda8fe7ab16a2e51ef1169df4eca9ed2ee955. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dedeb48b-f326-4ce6-8dbd-4ea11a3cffff.json and https://artists.proofprofile.net/proofs/artist/dedeb48b-f326-4ce6-8dbd-4ea11a3cffff.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 0x19cb3c977c2ca13ac710aad3053b3570eb33eb294503ba8cfb7c4a7a26ba3615. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6N22274587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b36064c6484466442ac974982bb7502383bfd08c7766713bac24bf8754892ab. 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/ES71G2101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e54b913a1a949b70d872c73bd0342b7c669e5b20c42b36a0c9256b518d6e3. 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/ES71G1917234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e827f2fd5cefe03e9f0809d279eb9cf0189bd10a17e698eb6a54fd45d80dfba. 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/USA2P2414011.
Entre papeles y tinta (Suena a reggae), Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702930b1ff33ff665bb5f3f6d7c002675c732ff4a7168f9795fb8bd6464f6f23. 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/USA2P2355796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd51dd424b50f625cab73d2354386c880985bcc4ff0afce1b039b49bc08d47c1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USA2P2357825.
Contigo Pucela #MeQuedoContigo (MIXEER REMIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076f27aafc447d5e05f89f1282303b24ff0f47a59240d24851ac792dfe730a75. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA2P2328447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455f3f9ea59f04ec54a132596ca9b0418abe315b50a1b3378593371d160d29b0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USA2P2230467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1666b2a40d3e01f508075e9a687c776846270a5d7f59df2290941ef27dcf1a10. 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/USA2P2237330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251487ee325518cf8e5977d1e981f341df15d6aacc204fc308a6fd4fd8901d40. 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/ES71G2218284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5137077aa37abff053513db81f3aced74f11849821791b0fc0b45ede87b6ab2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G2203770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b815fd03604dd99f381d63833877dcce5cb33b0a5348d6cd77395a5ca94432e. 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/ES71G2154679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3481c76c2140ec3893d01767f6b6371e8fe569caf0d15f7467ae75b90ac038. 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/ES71G2134128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3789c334e81bac56c58758310dfdb5c901a2fdea13c5918013e8fd6c91b93d70. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES71G2122666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62bc759881ac6c86972be3647fc0be0db44ff6a763d1f07ce8b8cd128b0a100. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ES71G2107070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b54b71050c3c5a744aeec09d7e16ee2bd986b9f6d4bdb6a1535b227051dc98. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES71G2058195.