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 0x68941d1767f0e281396837539ac8c2fb99739be49c988032ee62a1f9cd78d00f. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d348f2ef-13fe-4800-9148-a32fa495f9ec.json and https://artists.proofprofile.net/proofs/artist/d348f2ef-13fe-4800-9148-a32fa495f9ec.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 0x851ebe4869103c9920c44027421c658d96809194a97120d690c941d249575201. 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/QZK6F2555408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b07f37eb8f1c1aff84990a27c4ec19e5777597180079d8fd1abf3bf8996c96. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:04Z), 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/QZMEM2575944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b10395e4149fb55f882a9b76f78be8caeecca7a44e7de011b835570a8ac03. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMEM2575954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9569737539b82deb8ddcac4cd6ddbf0d6a64a99873f302b2892b1942422c7c3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:46:04Z), 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/QZMEP2517512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5973b1f932e43aa2213ac25fa2313cc558f62a40c7ba17bb39d1168f29b232. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEP2517514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6fbe71662ff4e5960f6f5ac13a0cb49b56f6eff16479cae71a2d543822bfc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEP2559323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988f2768a195c6f89608cd8fef4690435914a2b9d46326503270d79ab651fd5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMEP2559324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d028159b279b751ee666746dfc21f9072cdc906506cb8a48150a2f67fa9ee8f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWZ2573906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb475a9a5a2275b135be41bd45ac0a91abf1ff784093e5a88a310fe6a45b05be. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:19Z), 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/QZNWZ2573908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390f9485be8ca64858b90af893389f8198d3aaba503b3de3f03de19aca41e66f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWZ2573909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d0f5793e4b35838abab99c0d6185f89ebe4fbba956bb0dbc7b8ff73576f95d. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:32:23Z), 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/QZNWZ2573911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdf851221ce76fb7ddf9cd13907fc15b453bceafdcce2e57b08a907e5333e93. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWZ2573912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab2a7e58794133fa8baa1ccc5516c4d7fa0706df66929181006bc001e5a4bbf. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:29:50Z), 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/QZNWZ2573913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b6961fea419a63f5c13350ca1a7397f854567a5b4bc549405b80457a4f312. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:05:25Z), 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/QZNWZ2573914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a170a6808220fda0c4b8354ffd309055142d2c10c752e53c4fd6c07b7b9b2db. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWZ2573915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b95f7c98004d08c4260f90a1d8c39ac19500b3f6d6a837f9637c9d1927bef8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWZ2573916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395b5c59764c5850db071cbf3c5087c2f06318e1b5cc4c8be374abfe2e6c569. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:35:37Z), 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/QZNWZ2573917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7057de2075156f066dee45289585cbc8732157e19888672aba03adc5bf41b769. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:16Z), 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/QZNWZ2573922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1401bf0dfa6c397c843101f005a8028c91759ea51978d831353a77d35776afb2. 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/QZMEQ2554307.