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 0xfcd708cb80a54bf8ddd9bb3465b606b6fd6804505aae9b0f5c958e0c4f75a00d. 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/856233ed-0878-4367-a9b0-bec857689f79.json and https://artists.proofprofile.net/proofs/artist/856233ed-0878-4367-a9b0-bec857689f79.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 0xb807464df2a8eac9a3fc8e826ca4719a0e108bbd3255a7277f7930bd66f3d39a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEB1920106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529f269a4fea23911c398ee97a3bd5c6a9c51d2022fbd4a82acc7586742dd08f. 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/TCAEB1920116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4168e98b65ab52f06f13243125ffd94041596863a1a90d968bff4eaad73ef922. 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/QZTAT2180528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a85a67f3a49e006d947e2f5a77e59e44d87aca2af467e54a05e5fd9f9f0d35. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTAT2180529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23136541c76313a7d2e10bdb3f118ce3d7271ef1d4b9081ec00f2fb75228e021. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAT2180530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe191f17d4719c537b03fe74738e977159a0c11c7b2620bf0dd9590a1aad9277f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:06:59Z), 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/QZTAT2180533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de282a9953fecc3cc2a5b442fb35bc882eed86a83de7f784dcaa3531008b45. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:47Z), 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/QZNWS2368822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700f8f6d8bdbff4056bc4c0ef5b5511a30fa4fef59a84ea9147e7fad36a41505. 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/QZWFQ2439174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb02290ba754f0f8c0f6a9ea11931dcd3fe3236c9eb98066c90c48a93d334be. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFQ2439179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63990b92688d9f108f987739fe67243e7b14f217982e4ec10576d16e10d01fb0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWW2569543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8663d2c9430b2d26e6c3c2f02bd4010fc5082de4291775b9e45415b68d6fe0c3. 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/QZNWW2569544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e22bf45960789ed0f314fd43f570ecada7987b816a0a8b4a11726db2017423. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWW2569545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea818d71fbfbd7f07b43077f9c3d1e8c029eb4f734d6dacdedecfc53d6235ba5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWW2569546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c10bcf7d8c68cd6ceb82808393132ed92d4bfc61cb4888872cb1a67efc7f939. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:20Z), 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/QZNWW2569547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315a1312bb09471de2d1d7f24f771330bf7d6f37cfd1ed87da0fc6020031dcf8. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:11:19Z), 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/QZNWW2569548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4ab7c3659e7dbc54b1206947fb3d6c7bc5b60613a09cc230de2123b8abef8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:35Z), 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/QZNWW2569549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3104c68baea711bdb794266a759962f789f3ccab0f21f51ed35323e0ff443768. 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/QZNWW2569550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4184b97ac8471895b4fe40d41da7f841a70a45a91ec54aae2eb9564de80af5ff. 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/QZNWW2569553.