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 0x81d1701ba97e127167697c0ee3bf3b4675fd5f2bc5db839f083ad6b303940f52. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a96d420f-238f-4a5d-8108-55d17a721f37.json and https://artists.proofprofile.net/proofs/artist/a96d420f-238f-4a5d-8108-55d17a721f37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Katawa Shoujo Enigmatic Box of Sound (Original Game Soundtrack Selections)
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 0xaf41389caad919858a690fc696ac29b40600e9bd6a517a92940d1228ef4fa0a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ6K41200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3eda35d38f287d724e27cfa25db2a60fb0788b9c7f0eaa65894003193fa87c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZ6K41200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43839659618d17a50225c829073c78cb631c8ba57ec5a9286330bcaadd7cbd2f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ6K41200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6381f9777ca61786f64798b59a9fb24dd11c2f262c46588783ddc079732cfe3e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:47Z), 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/QZ6K41200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5642e14bc6293724ef8d6bc35af2a3cc49a5fd7c8d1aee13b58e04c42c62f53f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ6K41200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94733703bf304773279fba594f4d1db08e93c17fe05efdb44237d500c57e350d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:04Z), 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/QZ6K41200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49644e0fb7770305a2dfd39a2959d9a7445189fd45bf8e42f099ac8e10fd372. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZ6K41200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fec553990e12712e3d0562e5087af751cd506f54a1700a6250312de4e890d0b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZ6K41200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b6f7831301bd1023230e507f87ebeba42d6594a7fca854d9ae5222d8ae0523. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZ6K41200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab91dc61d17b5d4840e7fcda86a2b61559d68f72624d46f86963b06236beb3e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ6K41200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be46c0e01e3718dbb8415c8c112c93b82476f989dccd0faf0f7d6375d97c44b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ6K41200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b07753c2d1b30eceae805cbf7fddfcf91e3f4ad60096ff466c319329ac4787e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZ6K41200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce99286f9c581c36ccc7ddb183fd90f287c4db3c844909cd73c89bdd99905e8f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ6K41200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d23d68550b0fe69d09224cc6e2bb657bae29f1251114bdd4c426254b84cf32. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:42Z), 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/QZ6K41200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721c5e109bd201aeb1e80e37f2bd38b9ac22a42429f8849cfd292295d0bbcdf. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZ6K41200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453a2ad4cea66bc4e88d4578a91a2be16e08f5de8de6a15e44f7a18167581a10. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZ6K41200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4a291a96568d42dd40eadc2c8f1e0de354c281ff0032c7ab04b5451279c49f. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:55Z), 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/QZ6K41200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66db647eb87c09b6744b537fd23027bd81f25a4d8feb02082a5c3c8a3433a63a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZ6K41200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fce73147de8080f9e0e3790d1fe53ddf847263d8dc81f0f7dbc1cf20402f88. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:43Z), 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/QZ6K41200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e841c6bed926b8c14db07d435c339061b3cf2206cfcf6cfa2a159f665589127. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZ6K41200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4b066c2f763f4227e35a2b2fb35baed4df6d890f18f01db6af5c5132e19485. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ6K41200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b73e17310bef1327518ebbfef11f17fc6f11809022ead57899bfe4ea563ea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:25:46Z), 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/QZ6K41200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebff726ea85bbd8838ef2b8f663104bb4f97e14de7c2dd98797fdfaeb7ac8f4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZ6K41200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd78b5e308236308e084d385b97b69c55998189a7f365cdc8352f36a472eab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ6K41200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb87cdd6c651989954e9ce397d11e843c940013273bef68478d052c86752df. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:28Z), 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/QZ6K41200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4c6321094a9adafbf62470ad306b3ea0bcd53129356a5771b3e0c511dd289. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ6K41200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4c8ae221c8072ff270cf6c09ae5540dc5221de66f0cde81a5b847114147575. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6K41000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff37f96909edd53b452f6597a0b0109fd2e1e1bbdcd07b46e3e0fe69036e7912. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ6K41400030.