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 0x73ea812213486dbd05f4e973330cc01d52cd98116ef0bbcd7c93ca7fdfdb02c3. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68a36ead-410d-4a6a-9675-0a5bf8516588.json and https://artists.proofprofile.net/proofs/artist/68a36ead-410d-4a6a-9675-0a5bf8516588.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 0x808f23d27bbf876341b1d53fea92958f85567cf6a0efe4a0c0f1bb843b6466b6. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZWV32478303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b450d5e11635bbf275532fd6d9665958288e0df50a3a02868e23e739542285. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWV32483077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d8dad6739138fa52ec3455d29bf4d4cb313792edf20eccf57e2b5524e4a20. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWV32482993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d8c6d6e65da1d19c9629d61c9c74f4a116b468ee7e3fd4a7eb8975bcbf728. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZWV32490544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3531ae23bb881941df8cb1ec4c9bb2504b92e1cac2e8716f540e0d6c3d43d9d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWV32490567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92da92a4ffd455adc5325c647ed03cd72673921f977dff72c4755b1622350ff0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2415080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b673869c55fbe3c7df98e3005661f6847c98a8776eda95eef4cedbd55cd426. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZZ8A2415099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271f2ac0962ff756dc2107f06ca5b94a4ca3dc8b6afb81a91a0942c4f5592f7. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZ8A2415057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f12e216d004518805ca64610f5a0e2726ada441e2f31acb75e1d1fe803a0819. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2415154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901e6b1046637c6fc9de4e99b264c6185c9d30ca38b925ba303bb7a3c496db2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2417982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40052c18839ff2a8a6b55e9e93131c75ab22cce346d11e9b6126cfeaa15b7593. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZZ8A2417976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d380ded1b55a6921c4e48d79219cf4fdb76d7758e2d4fbb4b78b41e5028db89. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ8A2417932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b835927a72104528c6cb39fcaec578c26b643d21f3b182527a91c9451b8db1e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2417937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab7e258d19c03f2ac816c68f72eb6f01f6cb440a5e275a3bbb3fb2836f6ee3a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2417925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d2af814a0116c36a1e39e5eee920814a83b16e29ed4ccf7304cb1d1e2b4e79. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZZ8A2417952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab330f99cc2e0ba479594ab7d0b957604ebbbec71d4f2e0fb60535c29d1a98e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZZ8A2417963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfece1c3f39abcdc20675cf499e366d5e1b79e3ab7cb0ace1426b958684b2b2ba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2417961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd73828f741df8d24beec592a3363a585fce02d163058f0e081e305dd23f8ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2417956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea7da472cdd04222152a20e65a71697addb125ca108cd7eff654f51a0a48adb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZZ8A2417944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dc2971e095af05aa2d3403fd2b7baad18dea28866b003b69b77af37873b184. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2495849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ee891a70c8e5f9f84c79863f879ee04c815442e3459b11fce593e15c5d5de. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ8A2495850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba281f21e2b5a511cd8ea60c1178e988b6f1df17400ed182f87c87646fc33d6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ8A2495853.