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 0x079202ae32df7564fbbbd34c33c9b171b3e6a40e9a50b7b4f21aa9f44c202b33. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac357817-8969-4207-80b6-1b51327a7a03.json and https://artists.proofprofile.net/proofs/artist/ac357817-8969-4207-80b6-1b51327a7a03.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 0x20c92439dd2717c13f6d4ddb7109a2cc8a737d07dcd83aa6ab820382e800db2f. 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/QT3F42459272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481099f24a2a538ab5795d43b952fbda56ce90f137982c309602411d47239f57. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QT3F42459273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d1dec4a62a25113ea81a93620d5f084a7a4140b304de30b0bc33a8b0773b1d. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QT3F42459274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac2e0e1813646e529a73d3904d1899f1894d20cf811363c14a28b2db93db7eb. 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/QT3F42459275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e87fa0040c9d4ca536ab3551d1a1b2453de7e44aac23863fdcb1fee1feaeeb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QT3F42459276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581acb038edee2dd4ea660bd8b75b2e535ada126ead202581eba0d292c97c58c. 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/QZFYY2510375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbddc482a59f06eb9ac5498cfc157fcf368dc5d512f33fe30ee22dcfe20a9e0a. 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/QZFYY2510376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff743ef209627163d4a8d1c666b5f9ddc9c39b9beb34c260de2147f21b2ef0c3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY2510377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa364a96ddc8d95990d11e4d6b56c7b8cbebc96009772e92ef41f1909f05e9c99. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFYY2510378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dc472bd285c24e106dc479db1417ca7a355e2ce12e532a41e8ad67e4251cb2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYY2510379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708176bda6097c68b5de34981b42446dd37bdf044b1d7a853e7dae1504750752. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFYZ2519261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f09a4d80fdc7164857757a27db6e6dd6aa1985a3b7af1f12866149cfd61a679. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFYZ2519262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133a1ee37c3828b7701828456891c8472013c1cd36253997e5d6e8211f406e89. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYZ2519263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d594cf96e451af3cbed6f95552cd46f6c30b0392ab76d72cc7504c808abae. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFYZ2519264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61314aee0778ca08a3991b67b82a9e2eb220252e2aa16182242b09092e8d7fe. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFYZ2593748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01cc677f6b7a190ba0ad74068b44b7ba9582aa6aefd68458ef21c850385db79. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFYZ2593749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fd0f97ade5926b11b5d61dde14d9f5fa5c5fc613999ba3855fff316c232a8a. 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/QZFYZ2593750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b47b645816c50347c3ae27bf1b3b83a91e4b32df60d570e074b36edc1c948. 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/QZFYZ2593751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7722bf55a85f95f8e6172ea693de9118e1fe6b13424ddf45c2d452f795cd328d. 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/QZFYZ2593752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f359c8e92eff2c2f50404c588e8d06dccd3bf65b881688f0632af940a610d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ62509538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fffa2e33787daefead1730a430b2ad365b4ecc7881b63e6cafe605ea18d1363. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ62509539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe98542972d154d5e26ca07ec29b8cc12de0a2701d0e16f2b4fe4e371942b02. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ62509540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae88444ba73a55c3b60c631f45262d1e1056f49393d57b949e13cb072e0d177a. 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/QZFZ62509541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fbffdaedb7f6623722d5b8302fe14d08672ffc2ed640200732aa4aee557628. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFZ62509542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd9d453c081fe2615433135b4bc499511e95888aa7f741c8fcfbd36c618dfed. 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/QZDA62594979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af5d204eda89614acaf60d9b494d64ae08d33aa9de45918e1b2a95041b3b1bc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA62594980.