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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1723f0d6acb9d66ec99201d23761126e0557cdbfe64dff1d80c81f3241cd7c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7431df02-21da-43bc-b322-78b78acf8187.json and https://artists.proofprofile.net/proofs/artist/7431df02-21da-43bc-b322-78b78acf8187.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339134fa9eb848d04a7fea503b095980198fd3673ea5d72f1ecf8175f3b93231. 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/QZK6Q2320146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180b7394c6fe786bdefbaa0f39f517c62db139347b3c5a89fffd6235ae27dcec. 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/QZK6Q2320154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28763bf926a91bdc8f79bfde07b8640a88811c5aee666fcd435ee8253be5613. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZK6Q2320145.
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 0x910c276d1e669bcba2c18532d33a2594708000e0b5799a1f93de4df9e9695280. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZK6Q2320147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce4f543fdcf72e1aeba0149c05a04ab271aef4c4590491438e385916ca8816. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6Q2320148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a933b373ffe1a535d00adeda657c91a042dea83f92104e3f0b4ad67d139cf03. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZK6Q2320149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b636e1bf5e8ff8266cb7e845b6913de78142191babbd054b6f05d184170a103. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZK6Q2320151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91fc56eba0d16705e5694e5d1038f469c594e226f81a46f7f17e0ff66b9c7b3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6Q2320152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62a5b9b7dc64ac190abc70ccdc1d6120aab9bb8dcd7989260ec27c3de8b78d0. 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/QZPLR2257390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb51727160f373946b568ae974d7018b7720f3586389de274f0d504b76044ee8. 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/QZPLR2257391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3886559412a13c7d83ceceb6049d26bb94fca6dc27aff625830a4c6326ff1b80. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2257392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42259761bfcc4e3579ff00d1330ca623d21d2171c91f8feb1a1b12fd503d4886. 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/QZPLR2257394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2187a7fa945a3423b61a1ae0d65b9fef571c8f78b720524808cc6a345fbb451f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPLR2257396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5cf6016d7fc81918608eca46303174569f2153323abefee33e989fbbdd7ec8. 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/QZPLR2257399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20df3eeb9453a5f975bf9e0b554a764cc3780f25d8da45c690ac15517c0b2658. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZPLR2257393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982174f1bed55e9a19bb6d9e4ad7a128ecacb54fb654285c771a59a6e173ed40. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZPLR2257397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539371c07b0008a98f4c27d48be41462941d34511eb787c9922190d0db91b939. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPLR2257400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d21192514ad90afbba6a640f4a4cd276bd1207b8e2a3404182c9223d192acb. 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/QZMEP2292954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390905cabb3d54913857c0f8d3c672d30f566b63e10166fb4d4548727cbc028d. 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/QZMEP2292957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e0556a7ac2ed5a798595fb56e22acb2274a81ed772d41658420f040001455. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEP2292959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296409196f616d5ebd8e937eefe0b11b2106ba66e88c481d8118281880922138. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZMEP2292953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac770c17819d97dddd0de020f7f70cf7c88ac099c9576bbcdc4952b94e39992. 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/QZMEP2292956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b9d6fc817e83ebe889e8b3e38c118497e08ec42aadd39cba699f2dfeb744dd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMEP2292958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f4987fe758ddf6372f085edf52af7d3eb4ca811da4e59781da113f9da8a162. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1536427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd760296ee96daf9fe3fb78272997aa71db5093358f8e395d3b28a2f162f825fd. 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/QZHN62259857.