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 0xf67f7769f718f0ce1c6b68dc5ca4945d10acb59bec27fbc04f254041f8c403f7. 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/0dce1a2d-10bb-4a50-9e26-297a899ece43.json and https://artists.proofprofile.net/proofs/artist/0dce1a2d-10bb-4a50-9e26-297a899ece43.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 0x21c9dab4d45ed173451f9deb8d3f90309b4d96e063436205a79ece2f2b2b19ff. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US83Z1827884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0c29e9e8b3f6481722daf61eb6479e37d77384a1559468628b9e2a6f87fd9a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US83Z1903863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e567f1089167f4e617adba08dc9ce14e37d7021795b690b71c35a9b2ce8acd. 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/US83Z1903865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf466ab2d47ae3475c36ef8385358156ec1f2e137c5f522305adf6920c49f5257. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US83Z1912669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a4a944bbdbe77d894ed45fe0635505d13cf37b367eae2d2e4010670f1e659e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:19:54Z), 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/US83Z1917225.
El Dolor del Desenganyo / O Galo Cantou Na Serra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851857e214e6dca0288b922ad95685ab7edf265cb8b4cf1f5c949eae835e93ab. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USA2P2041108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb3a26f6d3132adbdbdaa68f3972b3f0275d6c2abcb9744cef22280e9cb8ae4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:29:18Z), 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/US83Z2113539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b5790e7a631dd16c383e03f5a9fb315019a17979bb8e0bab6debb430bc1823. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEPQ62101140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b27cfbe4fd3bf4e0131b3118ddeac34427fe2e9a4f184ee9e8343ea56a75ca. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/US83Z2147480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa383bac794f69b7f09327b2feb7b4e33287bccbc4d53db5107fc86bc53b52bf6. 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/GRSCM2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c016ca66879cc6c6ca185603408b73657e15e4e4c5ab60ea4ec926d28caddb. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GRSCM2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ecfd7f1af0be1040feec3b63fa6d23ffa1217ba77e7b4e712ce1d79d865b6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:34Z), 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/GBKQU2337297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed154dc7ba7808d3236317b58d76d54ca95dcc7edeb46c9e746576ebcaa4ca0. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZTRX2474048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a326cc69c332657e3348df0435110b3078570e5d5c6e90e2e5ead6410ea70b1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TRCMG2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a60853c152e137e61b7d6af15d0953617850537e7f8b02136a76bbcec7cfe6. 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/DGA0M2439270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570458b99ddc772b8efae02bd1924823723074679262146299eacb3a43510059. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ8A2410966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d1ad822e2ace6ec9e51df809c581c1ee595dcf053cd313dd64f6ac0573d79. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITLCJ2100723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1f063f49813a591c4e76c8ceba89c5f6c8b5d5f880ead7176448cc8fed7e53. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DET752500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d443729534fbfb74beb7464f91608dd0d80e078d93f5bf4fd2e234a279a2bd1. 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/US83Z1827885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2af1f9673c532f57c97a6182557b57bc5376e3dd2e206da54ea8cf41af732. 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/US83Z1832327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe2e114769ea0d3736e348026c7044662ae0b0962ca688082fc65e2ef24cbfb. 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/US83Z2018311.