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 0x5b31485501227b5adfbc81737b8c2fd9790c9fe96b1708f736e989061c877696. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e391cf1d-eebe-49f1-a2cb-a7add2c4cfd7.json and https://artists.proofprofile.net/proofs/artist/e391cf1d-eebe-49f1-a2cb-a7add2c4cfd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Melancholy Time Sung in Tea Trolley Lime
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 0x1a095b97b98f22e29284c09dd1bf223cd8a613b132bbd94cac7ae2fb21e455ed. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE6XW2187902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f0bda6bef5f9386ffba36b3adb0f4da4435037aecf415d0f4ed789417ffc18. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:08Z), 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/SE6HN2210490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b23d4981a2fcdb8771840b06a1cae92f447d49d601b9bf7adbe883c8844c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2301334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a807bb3f63de7e1150aa7b67f9e885fc4e3a7d22547f51c55e0112ac4263346. 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/QMANG2231749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9477023990cac8c9c6f5bec706ab79632e581ce04c04cea0163254807ab1bdb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLX9G2300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed63923a518f5071dc2dfbd18373e08b320cd4d78ccc3776ccbd895603b8cb0a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF2428267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584418eb7d60a2a870afaf6e2aa4ddfd15fda578f3eed444b7bd0d1ba65b24fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM3DF2402771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0981531c9d1394c929dd1d29e751b57c835124e8cc2b68617cb2367daee080. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2421494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6defe86ae493eaafb609d9407afc732183d72688157c877954bc32403162e07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2471469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d43e3d38bcf0211409b23d459886ed4b1c847e1cb866f3b444a8fa548c2c78e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT4K32506767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616059ac71fb0ca638bd58fab9dfee362d6adbfc6df3a01bcaad4a0f037ab5d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2437732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911cfe3386ba3b7f2e817f7175a11424e6ac2e8b360c3db06bd1e67dff848000. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2408507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac8277738562b178bae36caeb5369a53446d596a493af079617b3f0b99c511. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2407338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf453363160722772b97a79a1288ab5f8f4b520203cf184e065fb1f6f0bc024c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOPTR2306010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487496c4835300d27a563ecd2bb60288ebb8dc2781e89509f4231eebcb3c8a9e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2278309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb21e49138affaf4cd67b076954682615b41b7000f9207a1ee52cc885173bbf1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3DF2468354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c7fdd1598c5839c691a540c3f165b860fe5a54600956052acc55ec00d1bed. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/UKZGC2407346.
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 0x41f0664cba7e05c24d63abc2eddbf8257158ee570c384b299f04a1ac5ba573e5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2408552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c713a01f1a37595f30b9a53c72fbb0af2eaa75f03de79f3e746915055b84d8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USANG2296567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1fdcb8c847735ac7b26a6aaed2fa232fe82723fe3e3bcac33664fb1c843d5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UKZGC2406948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094f62fb251d20215ec7203203365bc90b420e77b84fde36274676f43c1bcc40. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UKZGC2407503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259021c9aac7dfeac6888b8fde463404bc9eacf157a64eb412138f46240ca799. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZPEW2468998.