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 0x65ca04af27c91aecf5f9f53b8367835fa3e4e12d226eeb31ab7bd2aebd62e37a. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaabd552-b350-44d2-b3b3-6176e20374a1.json and https://artists.proofprofile.net/proofs/artist/aaabd552-b350-44d2-b3b3-6176e20374a1.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 0x039905b3045c7adf8a71721595bcca829fa80b2c4ac945df1edf06ab6b7d70d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1973434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde70043b8eaaf2107f7903bebad7d7135c0fbae4d667962135b1e3630cc525df. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:04:39Z), 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/US7VG1973436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341b37e0102a6b2aebd8d466f4e2247314cd9729ebe032d19ab13d77bad8ee24. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1973437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8501c6d68da62f4433ded3bac90aed5d239a82d606a3773ba6ea4cd464662c7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1973438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c681dc4f8e7bb84bc4501c8268d65bee04268e1d4ecf57ca4c9b0e19dfca2. 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/US7VG1973439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea25607b3420d8aea110b9a8385d253fc617ec3e8302197dfbb5d074b070c208. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG1973441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c85d2422e78b393d67c90308cf9c211c7e1487095e7e09c94ce76a370370427. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US7VG1973435.
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 0x3eea9aeffbaff9628c006cb08013320cb67db663b3fcfaee78a23fa58748c763. 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/US7VG1973609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354fc5cc72943916953bbddd79d9156c33bf3194a56ae7004328ea06608f331. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1974879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0218dfcfcc129cf28d14a0df9f486adf27bd4aa992226389c1669466d9771. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1974881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78492353cf52809fe77ae7590b6fa3fa3c75e47df6b5c07373acdd832151696d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ62078665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75632b97fb07997bb748ee202c3175e940d41bdc68744d03c923a15667d7fca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ62078666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c8db1208fe096a26cb290c86f714bdb149eed17716f3f66f499690d27c97c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ62078667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef70cf7bdc8c62481a53a3687fe3acf43ceb4128cdd975ac7b6f2b2be2858c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ62078670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d99d319866f9d25244a1a1f18c42d5652b3fe10c3d49cd9841df88e2a6b0746. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ62078671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8598470e028a78df547264a856ac08f1db25d10519219811f5d886833e46b9a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ62078672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5684d240885eaa11ee81234b3872e84a7af466e000897bade96261dd6b878ae2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ62078676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7dfb11aa1b70ebc6862d74453ac474bb63c09ca75ef6ec6cd9bf70934a30fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ62078677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8886b933943a7abc0c0cf8e3c178463fbb9bc906563593e8be9b1f2ecc9d670b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHZ62078668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a6df88c4a8a7ada2ab9c2b2850e05fb780c54b8bef4b4e90300e616039982c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ62078669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9b044a7f079b0aee386ce853d17373dc96b04dfad432b8558a2785481781fa. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHZ62078673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90128c5f0e35b54cb9cf676c67d4e6479e596a7c02532a1ffd69e225ff5153f6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ62078674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dcc5d8386661831ccfbb39371587f57e8fd90cfe46c3eb55fd1b39b1075256. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZHZ62078678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a2059e5541dd5b71d08e11c32dfa8065455192e33a22fc20b3a9cda004f932. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHZ62078679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d7a371c22a58dc6c4b0d589df769a0d3e992d2d7de72d50a5dce9f744284b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXV662400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38447982cb18b416f605436c3cd82e3e58ba2b45cc8eb064f6d236db2908408. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXV662400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c882d5f9603551d2653c168f1446b6fa501f504899850cd059c1882909859b6. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BXV662400004.