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 0xed8535e08eb46410f9e988597061427e5615c68b649432587049709a57b4f985. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6eaacf49-9b99-4ba2-81ef-e5cad0584024.json and https://artists.proofprofile.net/proofs/artist/6eaacf49-9b99-4ba2-81ef-e5cad0584024.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x176523bd3dbf3d76a9445ca2b591162e736f46ad2cbd3e877f5b8b7212eff7a8. 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/ESA122488468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a5f73d2c4e13f7c91902762e1524be0bd3ce8b0874b7f7e097f330991e862b. 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/ESA122488469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143db625a1bf1a4b543363d1cd318e3b9c66376d07d00221898848e41b3b8807. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA122488473.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5fb4023e385624aa6271f39fb7f949c8c96ce3d562144f8b7e2fd3b1a5a8ea. 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/UKN6K1903155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea16e7775e265e62c4911586af8d5e0a8946fcc30c0fadcacef46423d8677f9. 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/UKN6K1903219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e8b19c5bcab2690d1e17bc5627fddeb67b04b52ba82f4540d012457123d343. 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/UKN6K1903149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204eff77c33ac6bf388132e6e6091dbe8d68e6b0c0f4f3ff142c7c664e21419. 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/UKN6K1903144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80c15bef44e36e5271f22bbca10f90db213ccbb3b58b8ada9214e3470749b96. 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/UKN6K1903267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebaa66f39902770d47a63f22d6f2a8ba594c0269458264d9f52263e0f9c3132. 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/UKN6K1903160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1183011c282d970105f74e87b2cefe33ff35fa9e4d4a35d8665b8da52882e68f. 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/UKN6K1903182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1183011c282d970105f74e87b2cefe33ff35fa9e4d4a35d8665b8da52882e68f. 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/UKN6K1903182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ca1a578f2d294974f72238212e4d5b13392efe756be08e6e78a71045f26f7f. 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/UKN6K1903291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e52ab799c55c824b04cd4d1b256c898adfb0f06d02a9e8e10d9921ee9a5d8. 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/UKN6K1900480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4e5eaa70fc448a34828953266a7d3d83980870f0946ac0beaed835eca00550. 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/UKN6K1900483.
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