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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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9359f797a920f64865cc69404a6d31215c8d7e937e6b3ac02486ac9d1c10a. 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/ddb62608-9860-4b8a-b339-5d0d18d742b8.json and https://artists.proofprofile.net/proofs/artist/ddb62608-9860-4b8a-b339-5d0d18d742b8.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0766be071147bd99cce0f15315819de38038dbd19568b9c04d2d2e8572fba3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATN261773702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c3973708aca9b99d670334e0030da2e9c34b48f607a4c9a87d63cc25a3ccd8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ATN261773803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3a2238db392d7be6ab257758e2c9b6a17f0f8892b47ca68a93f661e9aee3e7. 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/ATN261773806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0691949bab126aee541b5ee16675b2f7fa43eb9b677c15c3b7c07e0703a37cb0. 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/ATN261773402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe49be5508a2dcd90ed2fdcf17e584682d694ba31661de875d30c31e803299. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ATN261773404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b1380e605c40c15654a2927bf3b8c2c8155a0cdcd69575e6e7cc1127c365f. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/ATN261773405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1abc9dfe4500cb5ff5a057a57ec7e8fb8fb2e2b5b04e66533dc832d3fa3ecb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATN261773406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8af3556d420181b4e53d2733b5e9e0f2399c9cebc0db1ea36da08ad17e5c758. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ATN261773408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6865ecdf779b15d00634bc3c4bc0a5c0d894cdc61e78ea713ec208595b5bf5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAEL1944947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7833222c5817d3efeaef9b7efb59af0aec6a9b99ade70e41a67885238f1a97f7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R2259177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44917feb774c5d2e106df122efd86ad7cfcfe84de85270b3a2192a5b3893186. 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/FR59R2259178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc0e336c9e25eab7879f1a93fc0456225035c63ef47748f9fa714a848fe3cf4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR59R2259180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae25bf96ede86e595a1714e42f854b606d92a174e4b664f8ebfc180a2712bf4. 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/FR59R2259181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9afdcdc5d1f7227798a8bf9a61bed4051d8c3f2ba61caab044be796c302c4d1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DE1KY2405715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fccec5400258870c357f6f7b180c64aa05106548842c060a41f749f46692a2. 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/DE1KY2405716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9afdcdc5d1f7227798a8bf9a61bed4051d8c3f2ba61caab044be796c302c4d1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DE1KY2405715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fccec5400258870c357f6f7b180c64aa05106548842c060a41f749f46692a2. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/DE1KY2405716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf143b266547ce504c1c28a5005cfafdf8b969fb8b531d8758442de899dac9f. 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/DE1KY2405717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50684eab68e8c6ae532d3df7ef94bc35608b045a1a2e416416e1d55514b34b43. 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/DE1KY2405718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb432998cd9585b6a354f21d517a3706a8611f45a7d29d4b0a58a38c2f27c60f1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DE1KY2405719.