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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 0xedf751dd4a559e0764fd35a1a31dde528a0490f9bd964e67416ae5411926fffd. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/251a20cd-828a-4c29-aec4-162df2ea07c2.json and https://artists.proofprofile.net/proofs/artist/251a20cd-828a-4c29-aec4-162df2ea07c2.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 0x9f0abca47578779ba5ab4758dafb3a245139235471b08defc8be2faf1bcfdda6. 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/ITAD82200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e474cfc05e2ee3389acd7db97ab3595f4e864a32100d04f1a96d37217794b. 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/ITAD82200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c88b6081751ba6e1b19a1fa4e232c9a27a924cb98b5ad800194f7ecafc1467. 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/ITAD82200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477f08f4f81bf034527d24a054febec04d13e299b0a0b2b8834c31216ae06b23. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:28Z), 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/ITAD82200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e686bccad06e7851dc52c166773fe3cfd042d97eb5187e41e56dd78f3bc3893. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ITAD82300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c04f077580611b3b82f54f343958057591b976aac14b83de8ed9fd26f379e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITAD82300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead0d319b8a16350681b04b4240eb0bf1289f6b1fb5c092fe0af69fb13d4e09. 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/ITAD82300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a380ee62e65aa3f7d2e664f58637160630ef966a0dd39e06248c7058fee25. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITAD82300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0db4ce0a01d60eb09cf46433386fdbd4050599e14ef9af1a68c86f8e9d563. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:23:58Z), 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/ITAD82300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcda5bc38e8e591747c88494981109c4f93ba515876a9766ce271e39cb9d85e6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:21:37Z), 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/ITAD82300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e474cfc05e2ee3389acd7db97ab3595f4e864a32100d04f1a96d37217794b. 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/ITAD82200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e474cfc05e2ee3389acd7db97ab3595f4e864a32100d04f1a96d37217794b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITAD82200082.
House Relax, Vol. 11 (Summer Deep Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead0d319b8a16350681b04b4240eb0bf1289f6b1fb5c092fe0af69fb13d4e09. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITAD82300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b2ba5503a2cbb200528868c13bc793e4cd380323bf32f95a651b7e5795982. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ITAD82200046.
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