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 0xcde7c21bb69def060321a4fa964522882101ea07f7b155444f9e12e19905017e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55044ffb-32e8-4ace-8430-6f4cd406fbe7.json and https://artists.proofprofile.net/proofs/artist/55044ffb-32e8-4ace-8430-6f4cd406fbe7.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 0xaa15fe8256f74eacd655e3c7e09f76dba27b2e7414b3728f887a3b3e0bbc5d47. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARF390800645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9528ab90fcadc915ddc066f447347bb51a34752c791dde1180c95afc1719bbc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T12:07:47Z), 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/ARF391000821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5761dc7d8751d147998f759c3237006eac9836a111aa5adfb7e290c2bf1699. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:01Z), 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/ARF391000824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda851ef48665b7326842d370caae8c2c59e9cb8950e57fd4f6376e27ec024c10. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/ARF391000832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e859579a5beca3c218504d3e4099d4645aed462cacbf11455ed48953f8f4b9a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ARF391301360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35286bde56d77a76133ed2269a8ac24af2b695a11eb8038cecba34adc0ea94d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:33:35Z), 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/ARK481900070.
Marcha Oficial del Club Talleres de Córdoba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a9b51ec9defe7cdcd0baf88037dc943086db546d44557f0d4c321443e17d3a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:04:18Z), 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/ARCR42500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14bbbedd8e76957bf586d1b9f70f96956d292dbb3311161373547bc9d53d7b3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:15Z), 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/ARCR42500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9358e3dfbbf43167b4bfc1d849ef76199d38c46dd69842ea645788c8232a3717. 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/ES21S2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3b53f73c2923266a2f6caae390dc7e1d89b5523f037b3c912ac7bc6efeb145. 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/ARF392121015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28409cea993a0d4a93db52259812eee844ad97fabca603570b4e936090ec25b. 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/ARZ021900418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d96475e3adb7c1e3b980a2ac2f861312cdedf73bc1114b1811b55d344a4d3c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARF392121013.
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 0xf62a000e4387dd0fe8fd5ecbe090923d6e75d8e7b3a83c0ce4d056de8a568513. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UYB142123706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e48411ec792807c053a9511ebfbea751494be139949df265f6bbd4126526cf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARF050400714.