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 0x8b86798ec6e5d0c3c3c6a1ed2c9908552164ced6f1a59b366bb7194d020b8d4f. 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/2ac2d879-31ed-4c07-8fdb-19c6f66c7356.json and https://artists.proofprofile.net/proofs/artist/2ac2d879-31ed-4c07-8fdb-19c6f66c7356.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 0xdd11d0a3723cec2affab74e0ad6ad02aa44c552335037414284d8ec35878ea8c. 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/USA5R0818004.
Heritage of the March, Vol. 69 - The Music of Whiting and Bach
Heritage of the March, Vol. 68 - The Music of Hildreth and Myers
Heritage of the March, Vol. 58 - The Music of Clark and Hall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b40b0ba78c5838445feb3c0b0b22c6fa6ca96831fa2cc66be4497a086dc2bc3. 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/USA5R1134705.
Variations On A Shaker Melody: Variations On A Shaker Melody
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8385e9f9093d81caf0c9f47dbf367108e3464cafce00f5518f51b08e1689746b. 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/USA5R1031401.
Down a Country Lane: Down a Country Lane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7bfe5fdd1f3355eb31063ea76964238a6b5be127f89378bee9cfcedc6ee574. 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/USA5R1031402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0622d41e071fda83749f633ccfe65b7a0e63a198da8be5ceaf7f22294d66e5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USA5R1031410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3b516655b3ff17358b40f0b9fd234bd4ec177547672708c21200807156fdd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA5R0921816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4673c03ef9a4ddddd2d54fac0818c6bb9b1aa65e7043f1c57599bcce3a4727. 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/USA5R0922401.
Soldiers on Parade (Screaming Eagles; Sky Soldiers; American Soldiers; Big Red One; Follow Me; Dogface Soldier)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe288012e99bd25ffbbbdd356ec2f40f0700c053e47cd193f85627c32098d4b75. 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/USA5R0922403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1307d5c30f6f8ea542832f72faeed66cfe5fc29269de705369008193b712b23. 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/USA5R0922405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908cd8631a27886211e8b8d76d6aa08a82c69a3e37b742b880204dec43f58fed. 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/USA5R0922406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a7271b2aa2a00930598469cff89eaa330ed2748bda4c14f6379d0fc92ec3a. 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/USA5R0922408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acf049003b3f2f75fd9fb68d975914c80ea28f8784340e4ab89fcc343a7521e. 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/USA5R0922409.
Where the Stars and Stripes and the Eagle Fly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5018ca03a6539a106ab15350641b374a952139f955afd098d98b12c831b27723. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USA5R0922410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7120ad5c329294ac5893bc1147f822a7c6b90d685d59e1c1a883e9413d92da8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USA5R0922411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dbfabfe231f8aeb54037d31dd111274ef9d50c45e4a94a7178b60c0c82f08b. 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/USA5R0922412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a4482329dd2f9ffc9588b24f699c18dd35d6bc22cde8862f35397fecae97e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USA5R0922413.
Bonus Track: The Warriors Anthem (I Am an American)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82707948342339015cca35ae7e0026915ac4843819300fd9355210c5a39fd30. 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/USA5R0922414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf845cbddfd655197c3fe49c6ce0bb20c4ba8783343a0825481756406c2607313. 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/USA5R0507501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d9e23f18a4b5b2ee272501e57ce6bc459248a731c3560759b281a51ce06f7. 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/USA5R0507504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee8597c0ca9f402fa129391b40f0b4a731d7a283678241947c1d48db9cbfa4c. 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/USA5R0507510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822181ea6d33e2883cbf43b4275fbba87ccbbea166992f3efc4cef1c8bd74c9c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA5R0507513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ace0f6dcf89a35cd9ab2ff048ae2bc5e1fd3383a9179f9d6d1d51dc3d98d05. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA5R0507518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ae07795f3d3e7b5803d1d13de738b73917d16347122bb241a4d1f369b85e6c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA5R0514005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9bf29d5493a59b1eb0122a228ffea64bd69ea532bb7e239f7b659dec02b9bc. 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/USA5R0509313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ccc186a75804e1cfa7ed05e4b761670e99541f99d6fca1926041cb8246fb11. 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/USA5R0507012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa857493eb4d7b331d6efcb66558fd594ded818fca4141563de1aec095791d708. 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/USA5R0507013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4e61d5a2359acd467e7b6d85916136b04bba75a59684f47e90d37424d32b04. 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/USA5R0507604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e18291511db412c914d8c0f0c89e0debc6757ee8e04747c89bbaf5455e7a82. 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/USA5R0507622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe196bba8ca1f2f3a01ebba67cadc7eca49cf08cac41587bee3c5231fdd83132b. 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/USA5R0511315.