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 0x1766929fc2c9afa37ca1d53484359f3bf039be9feac14591c71ce9bb38a2df6f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b396e067-8500-4147-990b-c7be19b561ef.json and https://artists.proofprofile.net/proofs/artist/b396e067-8500-4147-990b-c7be19b561ef.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 0x164a337ce1197e34b4da380bbbc4092f7f8a0d7745ce9d98e0f4763293c53539. 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/ES98G1900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59e23c48576f78935100b58d63c7c31299b10de3d63a37939e50585b6ecce76. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES98G1900267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abae1cd6bd327da64c7eee991ff3f4189525a943a9198090fadc31c80d676bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES98G1900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7c9fc4c88eaa7577f93f901d5179b7705be1f1ec36693d9cea799bf5f9ef6d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES98G1900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3353442a79bc486bdec387940d323bd36dd5f955635b6c516f19cf642bf893dc. 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/ES98G1900272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3b9099678d796d862f7b2807725b80898428e70f47f2ba0fadfa3bf2f1bccd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES98G1900274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a8b672e05341185cd37ddfff93a3ee1d56b9b30cedfd1883922bfc9202d429. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES98G1900277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336ae98889228050a0e0a3e1102d9fd440a6b8a104e8377526449db78abdb37e. 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/ES98G1900278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65045eba25abc6d0cd6ff457aa22761f7fc42af8fe1eca6927e8aa82df6e73dd. 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/ES98G1900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21754dd58d263f6513907aa8db51db86a99be4751258b574b026107c2474ac6b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES98G2000088.
Himno III Congreso Profesorado de Religión Católica Andalucía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0766e04e5e073991ee2cfbfb2519ff27ff6a315aab5ffe668fdaa98d9e7bc908. 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/ES98G2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe08bbfffa00a91d6afa3fc249a58758ba1bec740f55284f0f725fb6ec935a23. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ES98G2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97ea941da46cc51d48274f87510c332bb4a7797ef28dfadbbd8a38fec742ff9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES98G2400379.