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 0x6b7aea42730d4a317a460008370e8f34cee2f6c06879d0b689ea5937685492ee. 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/535ddd50-fbf4-4fe3-b144-2fef96361d6a.json and https://artists.proofprofile.net/proofs/artist/535ddd50-fbf4-4fe3-b144-2fef96361d6a.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 0x392bd1e49ae6abff62ee775277f6b3e8c1d25059a2e3268b0e2a8a1dced1d44e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCJPQ2152827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa905471ec75b3cecfb66aacc87b261b71a56c16dbeda81c4329da0c64b0b0a24. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPX2353302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1702d32b23143db6c9961c882f4f5be15967bcf7a19b86e7c97bd3faa777bc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCJPM2074966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6472bdce65ff2249e5fa78d1127e4c2fa76895a16ac0fcc1cc5821f3a1705331. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCJPW2307065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf003937b4a993129009855bf8f67a85c3a0220669bbc7234f4f9796c2eb6db61. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCJPW2307080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae659afb76ba286c25be01c338f31a7d497bd5ef8e13176460c08c2e6e5468. 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/TCJPN2026766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85d41114c75b309dc0f8d5695ca242128fe16f3ab2efe9dccb124365deb386. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCJPN2026773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed20b86b386b51229f0e38dd5752ac6d6d70d4a3cf9363f22dc1b5eed1744cbb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCJPN2026782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c0a233df55914e3f4bc196525c9c258371054550e8ff1b7ec53a777cd71d27. 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/TCJPN2026783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a8120cec8e324d4a2d0d75f816874abfdcb06fb90da15d324b55dbed65f97. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCJPS2222324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e5fb0d9e6faf867f6882db688f1aab6c166f6cd3706e39560255aa8141c480. 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/TCJPS2222333.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacead60958ee8309ece5bbcdb12bbbf8801da8845e213db394218c57c81de74. 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/TCJPT2284187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a24b828a5631e8ab9f7c37f1b2e61dadfde769fbe759f2d98ec8e936043d1. 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/TCJPT2284193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2d0bcc63097c69a27a892c708b9ba8771add63a1d9630bc90e8a63ef8e673. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPT2284195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75151cbbfff14071c5be4041cca3cf5c92c532a9642859c15a448e2318c70b4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPT2284198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ff647f9acb891b9ab3f7ced4155295e34fd11fa825f6cbbfe12b82a3f9e350. 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/TCJPT2284201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc440a602e8036f14f4f6db1595198251c57b559e4f55d9cf90f8343ae7aec708. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCJPT2284177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ab35c7c9e5adedbfe78501ee74c3605b259df1984e19732237b87c6ccca363. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCJPT2292076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3d0b5d1c437f33504bf11cbd9773cfbb244b97de8c5480d0f1e990924ad623. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCJPT2292079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd4697760dd13fd22d1637d9a81de97fc2f5fae1e14b0b8b30c26e259c5e57. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCJPT2292082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f796521fef23004c2cdb2c3efa86bdd3301abcb2b752e4581a46acd4c41fcc. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCJPT2292085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bad3183f22343c4443e6505cc3f4cd6817f6c9df8ecf7d709b40e6aaa5dc738. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCJPT2292088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa805e7ab66e4d32b6fd98189a8f0db26bada24bc3f2f8061d33af4ac7fc1065. 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/TCJPT2292092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174f4865586e4c8bde725637b9881ce3420dea6dc88779468f24267e2ab70036. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCJPT2292096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f854415337d81b255ef23b20f3ef59ea6e4ef8a72fa71017271443ebf4c424c. 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/TCJPT2292101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e96688bcda196190bb20a2e7898c62b1a0868f20f2b877fe517cc522b4968. 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/TCJPT2292107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402407365fa369bb48d05b7f86fe08f9f037f77e541866784a186f3ceeb6a4f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPT2292111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96afe3976debca40bd61682d93378c3aa21de9c5539def55e3caea0c1f27b098. 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/TCJPT2292122.