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 0x881f40585bab4a37a30f15f6ad2dc0041fb8db91cfdecd1cbcad9799fa3b8231. 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/ae6c4331-9a40-4bfa-99fd-c0da7b536d8e.json and https://artists.proofprofile.net/proofs/artist/ae6c4331-9a40-4bfa-99fd-c0da7b536d8e.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 0x74744d143b20d434e7e35c26f21cf8c60ebb8b45d48ca707afb81109a2900a1b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCACD1556373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4786354e566d2c78e4e61d4082d7fb27e494a87d472cba5caba7f2c76e3a89. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:06Z), 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/QZNJW2354176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe091435ea9813a0bc18ee47a8956fba31f9f48e9ea24577184a1e31c46b8c94d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:43Z), 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/QZNJW2353603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046b87d45b6f0c27b03109ecc40a9a571bc9cfe912af4fb794ece71378cb5c91. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FRX201798387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6fe276581737c8682bda726f453c167383401880890a614f4c647168975ac5. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FRX201798391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dec3cc7c1b16e332a496d9a6be2470a2f1c3fa479386dfb83b2605a1513337. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FRX201798392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324e69e6aaeb4a5ede15fd91ee4c3c44d075d3a591f9f2e77512282c0bfa33bf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX201798394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74de347f4d3e25929d59a6f2ee3ac19e61fef72b868e3f4cbf264af73c9e608a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:19Z), 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/FR2X41856564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f9da7e1f616e0a982c0a64ce1f84163a221775808299382afbaddb9e66d42. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:20:34Z), 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/QZNJX2328685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b6c1387fff21fc48e77982f0019b61245f1a8911478d2e78c80807800bc5f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ZA41S2021050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1227b1ad189a4c235ce8841e410e4f143a893e505d1c3ad98831847003226c4a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:18:16Z), 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/ZA41S2100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d07e2b9a6a1527a40d4f0034e9d3c18445d87868d29f92cf82f0f8dc5f8e0e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZRP52113385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfa0d769c281b50e6d5784992d3973d0e16bd445e9200260fbdea4ee20a2650. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ZA41S2224919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c12bf05edfc2dda2f126a3cf02147cc0ce90755fdff1d477eed1827091b826. 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/QZW9L2313460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c50fe5cd52f5e5eb8ff2d746dfeae99d0671fcc1c62147313614ea3f65a2b1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJX2505813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba56d6c4c920612556aaba2f2972e83e3e7c3c7f2061cb716d2c63a126bec019. 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/FRX201708441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ace20d7b2e32b053c4c9c20cefedc7cec1dd4707802762cff1cb2c96c31e7e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZA41S2224617.
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