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 0x5e05803d677a6b57f4e12a89223f1567b74c1a9b7dbab783250bbdc73869bc8b. 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/f523a8b5-2d1a-4554-80c3-fa85a5023768.json and https://artists.proofprofile.net/proofs/artist/f523a8b5-2d1a-4554-80c3-fa85a5023768.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 0x3569a2f391e7d7fbb13d39ba5df3807f47a4835515250460850ab9b640c0a005. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPI591000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987368049f14b728fe50637ace91c9de2687dded0b2937f39f311a1ca34aaed1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/JPI591000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf787c4fb78fc2133fca1db28bb9d07a13ee3dd00c3fd4e28efd906a7017aca6. 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/JPI591000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8043d6bd89cac17fc5a6e2deeac0b24c5a18c2fab0df2b4528ec79346d3318. 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/JPI591000261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8230f6700a9a482d2827702f899ac2fb1bad994d6956851f6c17059a1473c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPI591300694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880317beb66076cd663b70c84d83468412809078b78e3f90660aed4e47d46711. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/JPI591300698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb0d7f4ac109d155e9d6c1434713641231ee7637b70dd5bcf088e71ad801c26. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:32Z), 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/JPI591300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7aa8282b344917782620d5c590d0fde846157b1dd64f721b74f6bff4a097fe. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:53Z), 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/JPI591300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561ea3e38770f024253129a777d5dc601977fc926373a4963410c45b42c33f1c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPI591300695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fca3ff22fa2371a262f8c7ca6218416901b1b70c3a9736abfb9dcf4c901d7c0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:45:49Z), 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/JPR751500821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da2c64653579b76d8a2e7f5c74bcf3b6f08c93b5b642b523d8e0581ff62b640. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/JPPO01801881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012af3a4a72c3b1c186b8634c733042c6024918588754b482d75dc3cb589fe57. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPPO01801883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41424428a231fcf58bc1f1489dd6a5872e04e710a7865bcc895f6f2d1b6975. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPO01900635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deccbd417daeb47ab46494c0cf7a5ba215e272adc40b0ac017e46b23ca08702. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPPO02001180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12b590d02e470fc3c7179b43bd981461da6df593f841bd1f2ee6cb1d2b3a78a. 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/JPPO02203269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc33b939265a266826e51d1ac51d33a1600b3ecfbd7b916c8944bd1740d3991d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPPO02301509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bad4c58807785511742f15304074b4ab6d00a88fa2a71d858b77086f1b6e1d. 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/JPVI02304194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2786e52625527baf71d8f85e0f787bcca6d0b21e25a68fbceee18f3e6af9d88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPPO01801878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9060f6608134f5f8809588713b890764d0b01e68933294d2bfdb0a9117060a67. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPPO02301508.
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