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 0xf7c885aec300aaf43c258465d4169248673e5883d68b87da51539ef41205e893. 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/98a7b0c2-928c-47d0-8d24-48d046dca553.json and https://artists.proofprofile.net/proofs/artist/98a7b0c2-928c-47d0-8d24-48d046dca553.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 0xebd195a43edf77cdf72558354582b41238c692af3c02c08cb7ee2bbef38d0a98. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZ22B1779343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b6b558fb0540b0a5452969bdfa1d7d3f3eb1a77b9a397401d99ffdc69605f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ22B1779349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd195a43edf77cdf72558354582b41238c692af3c02c08cb7ee2bbef38d0a98. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZ22B1779343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5a14188373415cccd7ba4cc1607a12bc155e3a3a883985d5f38322806f5d02. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ES60D1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5a14188373415cccd7ba4cc1607a12bc155e3a3a883985d5f38322806f5d02. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ES60D1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dbff31997b25e389cd25edb8b42066fde9e1b91e589e98b87ec35c4711279b. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/ES60D1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dbff31997b25e389cd25edb8b42066fde9e1b91e589e98b87ec35c4711279b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES60D1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94e351767cfc09637251033a6ce57ba9f7b08dc52004e82367cf643c767819. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES60D1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04c1e028a5dfd3ec59d0aaf6a21d598d52982aaf3d977a3ced7c52cb6e65a1. 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/ES5702200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824c9f999f0acb967b9eb167407daff32c967020fd5e85eca9c5a8e8b6708b1d. 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/ES5702200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84cfaca07c0ec5704ef59d4370e80716dab1466398c4b36892f1751c93c07d8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES5702200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2213700b808b6d8354eb9d1adf5b6fffa2a3f84a494517dfc5d4bf5633a28a36. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES5702200964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def6a5445ef97bbed672fc0f8b946d4662f6ca425b5c6802b5cc8ea560ccc71. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/ES5702200975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b50f383e41cba53d984349c7126b18098a7dcab9788b3b79bfc75d4d5e9038. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/ES5702200973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09153981c3a92565a680e987ecf4ec6bc94e08fe99bf27c1fc6974829190dbad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES64E2488082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09153981c3a92565a680e987ecf4ec6bc94e08fe99bf27c1fc6974829190dbad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES64E2488082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d02202e06b8221679882b7e579b256573023636921cda89dcb5c0e3dc02fe2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES64E2492308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d97dd9ec998a84b5479baaa50a765afe7836b8ff83977d1563cba2902ba876. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ES64E2507174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde282976112306b06332196db7832f7660d2af771742df8b3db2f1f399c025e6. 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/ES5152000359.
Quién Me Ha Robado el Mes de Abril - 2020
Quién Me Ha Robado el Mes de Abril (2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bbc96daeeaf73dd5039485fe0f1a814b4ce4af98fd495b573616e75a51f654. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2021500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b99d22e8c3c75afd6176651b5aae94827f2b76b4d5fca93a57639b5d8126fe2. 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/ES64E2304014.