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 0xf009635f15714c10e622e0ad80f1c29c1dcd7286bf6d936616992ce0c6652512. 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/26a5e556-ea9a-4017-a205-e952d6996bf4.json and https://artists.proofprofile.net/proofs/artist/26a5e556-ea9a-4017-a205-e952d6996bf4.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 0x69cafa4258bbcf0378e6378d9df1a9e1beb1df1f9e7ca8f778ab2c20f7b3c30d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACE1544126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce5413e7a2c550337f2d38e2e9be34a4693a59ea7dd834a5017c48e0a241de2. 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/TCACE1544130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab1f6168bdd7fcd62c634e0a665eeac9ce22e4625e59d1c471062ca80ac957. 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/TCACE1544134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbe0c46232f4e5430a17db8069b11fccec1abe21aa0d0e6d0ef7eef81d6c4c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/ES71G2104251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc708805b9129a56f5047c573ab25abf0b820f58f0956780bb258f54852d46a6c. 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/ES71G2104249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e03d51727c2d30b315548353c283aeb18c3fb52204437e5ebbea6104ac96e6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCACE1543942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe698a05cdfde2e4a4dcb4a1d6a819b2a5aaa49e3c3905e0a5e80bfe0e845af89. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCACE1543952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d81b8a82a314f359613daffc1ac16955e6d934107ac9085f2ff9a5d5d134cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCACE1543972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c5f0f17c64f7c5f9ad4ae1d21fbbf33238fb318ddd2ae63a7df27527f02303. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCACE1543977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c0668daba5d3dbd4a97a74782c564dce0d372bf633cbdda05e4d1d326577f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACE1543982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640bac32c32b41a1fda73b95fc520d00e336f48ac6f839c9f07473c9ce047cbc. 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/TCACS1667029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe54d666acb366a5a76dca6f0529d876d6f19ad175f66c2afebc11dd44f567. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCACS1667031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca28bb585a5530ddec9f0cabebe74aa61e2f837ab0b5679f91e701103d904e2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCACS1667036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e743e9d2bd51e043e7cf55a821c4e9c64d51d7602df0cb2b7554447ba0766. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCACS1667040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe397861404c475260e1bbcd837aa805c117c9698934a9c6959c0f0564620a984. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCACS1667057.
Recuerdos Que Casi Nos Destruyen (2008 - 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de460b490e3f13d92d1c5590d7c62094e1b1008d83bad2fcc61795ea3efb542. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES71G2105240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f5449c319760627225ed8299d6372695efbbfea7f0aa127e6ea8f55ae6fff5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWT2552726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f5449c319760627225ed8299d6372695efbbfea7f0aa127e6ea8f55ae6fff5. 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/QZNWT2552726.