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 0x61e2d9279b96ba1b623463ee4937419e46a5e84dd3829a1aa83baf82136dd26c. 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/a7876c89-4547-4e5e-bafe-04a341040687.json and https://artists.proofprofile.net/proofs/artist/a7876c89-4547-4e5e-bafe-04a341040687.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 0x676cde2e4c49b0571c5c12274cad993811bbb5da5de6afb5d7f245a4953fa36b. 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/USMH92318829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d866e9bead3833353c3bb2030354611410af369f0286dd2dbf6b386a02105d. 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/USMH92318830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25abc0e525e5ea96b23d4300ab83b2d6c27aa185818f24f7c2da380ab4ec7ced. 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/USMH92318834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeef2beb33a178288a5bffbda98f21a6a67a5d794f930694ecb128d959376cb. 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/USMH92318836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ffe26c26c41444e7c58fdd55f0db51f95c04f5b148fa9ba955f019a7543b1. 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/USMH92318837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30549c68c8aa44a2031a64a109ec860791d401a4b1dd9fb7359f55bf175647bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USMH92318839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5c2f1bed6cd27c52f84a1aaf76f92dda5b6e85447e436a2e89eae693ca9b36. 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/USMH92318842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921da2b30076b9986ea1eaa737568814566654090358dd1ef86c3aeb5e51336c. 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/USMH92318831.
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 0x091d4292b7e8d35d15c2a8d8ffe16c34de378490aa55b72a1b2fc0de5f331aec. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USMH92318832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1347dce6ee9ddd54f1a433be4d27a61c9e3de1beca780ea88fc3158064519. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USMH92318833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397d239805c9ec6c16e8119bb0ada63bbcf5cd4b7b8eb72bcc121a4f4711671a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USMH92318835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa214fc2ce6baeb02febeac0234dd11b3b16f47fbdc8f4df4842556fab116b284. 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/USX9P1419705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acfb7aa04505e1872a7124abe7cea9492821a648b3d3c77b0093e3a9ea6d3ec. 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/USX9P1419707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b85e98b2910c8f321e40682c1d05b93d5211dc26debd758eb70e18b5cb4f92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USX9P1419708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67096445009a9139b5359b490155b8f79830614ebd784c145f1ca10804974ce3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX9P1419709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c63bb1f87432ea3f52451b0a8c4784cf762b5a0cd01cd38ea0a966ffe92635. 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/USX9P1419711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a7b9f65f60bc54cad90002249c8b096f39f20e3dda275f0d6424741866093d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USX9P1419713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67c3a0d685b148762884b27d31879061bb732788223c592cc4dda96069ef6ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P1419714.
New World Medley: Scotland the Brave / Oh Suzannah / Camptown Races
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae94c3bf222199650765bc9400315655135c4e0d73c0cc4ce1656d378a7f07b. 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/USX9P1419715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a902ecb2258be77122d4d9d7203bb420bab6a1574307bab08698e8b56aa9447. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:46Z), 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/USX9P1419706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eb3d6a1399e01b51ca6e319c42a342aed4c141f7ab7559112f016399ceb27f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:42Z), 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/USX9P1419710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252f878cc3720321c1c23f5854927b3720c24ea1c1984a7130bda6273483a77e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USX9P1419712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c6eab9bff85f9dea5bd7580ed553dd16f4089cb44cf595ab3cc5487b27a06. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USX9P1419716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c72cb1b73b48561c4a5002ff6b883989dc7816808e880d8200ead6e38ed435. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX9P1419717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af2f840e86d4b254355df8effb68916c2675a984d33a4b86845c8f037d32fb7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USX9P1130059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5011b4c8622eadfa0fd90319a6b8a7c44e9a37913f4834524758f9535c9f2b. 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/USX9P1130060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6522d1ce897880ee62d63989d3addf324341a18a9d8df88acc4b549b5ed3d49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P1130061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edd3b018f0d83eeb7cb72021dee071b98d12f2629dd886df81ca9a8a9dc0fa6. 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/USX9P1130062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c932c0f19f8ac119877896699f5cb4739e96ccf63281988469fddf95b4fd7b. 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/USX9P1130063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd771c1db4a710e8cc6b42b31009fd3ed16c07d457612c59e88bc65b34770654c. 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/USX9P1130064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fd7154c1ff0af534d473c379dfb6cf0fe478ac45500203ece8f9391f2db855. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX9P1130065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac5b4a141b383bd95c8e59bb83a650b81742354bafb67694528db3cc7fa26a1. 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/USX9P1130066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739cafd32cdee3d3ed506eaa941da3ff43d74a291918164868719f77c04c8c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P1130067.