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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 0x359643edf56728cb38f098034b99fc1e90998ddebfcde7ae4777028804ae3144. 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/d2d9e64c-8d59-420b-8754-0a0ff5ae0983.json and https://artists.proofprofile.net/proofs/artist/d2d9e64c-8d59-420b-8754-0a0ff5ae0983.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 0x16a19f705faee7a962b94e943b11b946c7e12d231f512147bc59c09da7417b93. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SEYOK1901059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094248ac3fb79dd2ab0e33e281ae6d5cb81b8820864bd95d70489a3a03d999e4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SEYOK1901060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b4fbb594808996d2e7b758001744f5efacbf8e2adbcda39fe8493d669a83b4. 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/SEYOK1901061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd141704982bc49b5b451529e4c7365982b703dc609ab350c32b840ecdb19557. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SEYOK1901062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f928e79834bfa1f00a197a8598d7f7409cd1397be4d0d1b2c52ce721e246484. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEYOK1901063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997dbad491bd227b118a844cd777dae50062712c9e5a5259ce4af8da4bca2217. 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/SEYOK1901064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6db0958b67b9d91d79f6739b667f99f4f7914a0775a5e2f5f6e79c914b0a8d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SEYOK1901066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17e90b02b36f6553e63f9f18b0947de474e702d04a4b2218fd0fc427206ca3b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SEYOK1901067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79af1681a9e3a699f86de4e2a5b3f449fbc025c663deb4e0a14e03a2af9265c. 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/SEYOK1948841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0cb569de4002443d8f4ab71f9d5e1d8330a986912f53074f732d0ea0498e7d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEYOK1948846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8a3b5a5324c3d02db26de0a4a6f2fcbe338a91f64413ebf13563c56160ec1a. 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/SEYOK1948848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37705753891a0ee6af8e71effaefca70ed4752f6833f9d2b018c305084dc2fb0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMFME2031464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e79e2b4f00762215ca81340a81be162ae9ea4f8a44ac2858bfde4b74bc4e01. 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/QMFME2031475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c39bc9081a5e78bdad3f15b117b4424769c67ccec7acceff5e05fd6ba3d155. 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/QMFME2031477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0fbb9cfcd7c155bef01b0092e0f1b0bf946538b22d744a13b48593b424e787. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:40:02Z), 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/QMFME2031478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5e848a3390bc20e2c1cc6fae49284eb9116d9b7d13b3a0e68dc6a396a0e3bf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:37Z), 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/QM4TX2264281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62294046cee4b0a340348b959ce14c06c2251a0aac148b175251aa90bde2695. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM4TX2264282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ccc796895de8ef075bdae5644dac179f3f12dc000565073503fd07f135fe43. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QMDA72207431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e5cd0aec5c13dc561e6cd459c0ac3cac6dce04001a6f55ce6989f7c08ed1b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:04:11Z), 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/QMDA72207444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48a790275cfecca477e0318d59737077295c34cf33927e436f25e6e25b00179. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMDA72207449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962cf30e6900355243cb934578cb2e2f1075019aff6f7a8a2198e0d0390f7d9b. 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/QMDA72207450.