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 0xaa1e6d3af008de82e22a7fc9f519585054c24d8c9ade889d1ddbf2721f11527c. 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/1b2d0229-256f-475b-a343-63e629858134.json and https://artists.proofprofile.net/proofs/artist/1b2d0229-256f-475b-a343-63e629858134.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 0xd16d08d954f78560ad2e07262b00999281c40a74fc18a0b9b36e905609656ae0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1706264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846f5855e7bff1f17dabc7b8154f2e18dee98d7d6778ae1f96580afdb559032f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:39Z), 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/US7VG1706265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00faf6fbaac89bca3b58ea0d2f690132fa30c4dd6de79384d457a4eac08fcf0e. 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/US7VG1706266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f3c26fab0497353db757d3409723f3499749d1f0d0245cd7cf9ccc0809bc65. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US7VG1706267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ac6cf0ead7a358a343be19275c435a3373a0853cb4b1e09582eea3a9b1244. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US7VG1706268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3daef8e663db93857cab9afc9d7892be387a058cac1134f9625b53f05efac68. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1706273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c287a3e0e6bcf8364f06b42584a05b1214155e449293afe52fac3c9813edc0e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US7VG1706274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6ea7cf45084b1136f7845f7e2b562bccdeef54da43c27fa71923d2a9d10eba. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:40Z), 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/US7VG1706275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e2bc3b6266f7e837214694b66220dea3227ac16accf2774db98c2706d4b5c0. 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/BXAPX1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8385edcbab5a5212ca638660efbba286dd8187480832ad2841478e32c9bae67b. 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/US7VG1876284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a3022442453af60a64878c3386d2ea22495cc1ff6be07e7420274e76a6ad9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS1949850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c07d67d94e5f2e5c491a6a023927e07bfea149ac68791b4467c01c2d2f61f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXIQQ2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c9f100fc721edd8c19b6f1f0682badd344c533b077cdafe64d96dbdc859b4. 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/BXIQQ2100017.