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 0x8a102706e0b47b99576c0fcb25b2a0ec35b557e7fd6dd818794671edb2f62448. 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/cdfb1c83-2c0d-474d-9b44-17535f097030.json and https://artists.proofprofile.net/proofs/artist/cdfb1c83-2c0d-474d-9b44-17535f097030.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 0x53423c163a9cb83e9c48f9f5e45577d5328645422f72db7f8f1f6513dd7443d2. 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/DEH742414114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e6fe65f4fe078e583f93f79a4c97263ef7d67133da26b89882175159d8361. 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/DEH742416950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83df328a75f7b42b2e7831829e0df5bc616df3c3cfc94afe326880e34304e683. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742416951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db7391bd1d860ca0efb24635b25fc67e1f5e3e433cadb118bf9715e97038772. 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/DEH742415249.
Everybody's Free (Laurent Simeca Summer Breeze Remix)
People Hold On (Laurent Simeca Nu Disco Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe18a3d85f596e7316dcf209d306247e5a8e4f0b0f92bf5402128d0188f95321. 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/DEH742500711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445a93e39f16f8b0bd3448cc0279ec69a3e8e09e55dff089cf33c0aa30ee7a57. 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/DEH742501702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0c6eb875a3215d73e87c86bbb6a71e8030942da133287c0979ff569d784faf. 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/DEH742443175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3622b04157c3e6b4b2303f0188557fa0a044f06d4d92efd9ac32246b1f16fae4. 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/DEH742441132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515d971685f3b05522f54283dd0057d2009d63827445276f7a6bb79545b73053. 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/DEH742440690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639fcd8fa0d1b56ec13a8571b099a1a0f6ff881fad3923f2c5e2a001a4855f30. 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/DEH742435853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35388bc9a7e490460ebb0ea5c6f1d544742eaf350f5cca6c4ee29e4d1250661. 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/DEH742435852.
Everybody's Free (Laurent Simeca Nu Disco Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3ef1ed9dd7d0a4bc6ff3fd52cde3ba2ef25217bd4ec3f74b783f79e0d88da. 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/DEH742439547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dbb758bb1bc724d9aa6a6f03a07ff05065a221902ceac949696fa5a9d930ff. 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/DEH742436515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2206e019f80c02034db64608c3eed9ffee2148fe7346661e633b08770d829e91. 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/DEH742434509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b1f5a020c6d3ced987ea71ad21d76937c1f925723c8e0ca4d4741003c46f6. 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/DEH742436167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d49569a0b2c7b7b2df1ff340503f2d47149ef325afc38163b1a71a33ee1c2c1. 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/DEH742435335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe170ec70219d20ce91d6e772979878c3634cca9d1238beef80b46016266e5c85. 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/DEH742434984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad591a16f248c80b05a9409c59c82f24cb95114cbaffcc30c39ab01cd2cf01d. 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/DEH742434031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5940ec55a4db940bf808e29e5ca7712596320748021224dbb76f2c920a53945c. 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/DEH742434506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c9516a63eac743f0c719f9ac0192329c25927e7618cf0c19cfb5f1a587f7a. 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/DEPI82433634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65fc10033ad1026551d4ed9dc8c1dc5a9782b0730afd4bf468eb7f86054da6. 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/DEH742424626.