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 0x39b025409c0707d72a99bdc0385aabbeb670a3816ba495322b22ce8b760c4d80. 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/b55d5b7a-8d13-48d5-bc4f-158f308b5e52.json and https://artists.proofprofile.net/proofs/artist/b55d5b7a-8d13-48d5-bc4f-158f308b5e52.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 0x5b4d146daf99ba0f31d995ced50129cceb824332234e84112278f75a18e0d6b6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:41Z), 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/QM3DF2247837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649f7d21c3c78d171d574569c0441a0b20c1fb9f3ee6893f03f962a7f2e36394. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX3HH2381876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4fb2b25297b5604b931d4a439074b79988d3d03cff78f61946136df5a40908. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:45Z), 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/UKZGC2305616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750678e05dc6cd2edc3b0eca08acbd779a27af43168c9f1c560e19d1756caf45. 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/UKZGC2307943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df7f9d08b7294cfe98a01dd26802018e23a8ce24277e22051abb4229a175eb. 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/UKZGC2308013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71081f1468b8a54df2301650e6509b053efd76b48441bc1816efecebc7a2f69. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UKZGC2308072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5023643e2f5111ae13ca9ed95d8860d43e18257c0a56eccd9adb748a8a40d. 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/UKZGC2308680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ad14d58ae263e4379d33dc786e77ec95460e1c1904ec6ed41ea5d5ce06d5d6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKZGC2310060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e34f4abc9d1943fbb1857e9e34a3a5287b45eade1635e86a8de239cbbfc2eac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZGC2400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391c04860bf62473b55ad53951986bdc2de2ed612aa5787abc7fe6f9232ac73a. 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/UKZGC2402588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e04127b6f07705e10ee8aedd33b50200a8b74ee7b428856ca5df35ecbf44c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKZGC2401871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920864d49fa7f739981b73354180eb132ce8600fb1ed8b7afbe78ab07cd2cad. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/US3DF2453265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d1035ff594699e6fbe6904bae92bc27667bad5f144a0937896b16bb97f2e77. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKZGC2404023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71959dc3217018cbd2debd92b0ef3850f3dd1958041bb3f406d595fa2999a725. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:13:30Z), 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/UKZGC2405707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d227fdb26e7eb4be2442a2911085c955335fe94fcd835b5152c501ea772a73. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/UKZGC2404827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b908db4a6e891fce6f77ff783b92c5243b2aeed48dc60df4174d7463c93f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKZGC2404724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bdb95903a50f7726f4ec8c10cf513a5a75ba67bdfa6d991251a6858c49ce67. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:04:14Z), 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/UKZGC2404918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e39f230943772e5d417c00f89c5f81c731c080cba6ae51627f3fa2a2493ab9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKZGC2404787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd0fd0160ce4ebe3986fbc99659e4903b484edaf7b505fd8cb38224db11f16. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKZGC2404886.