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 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 0x0df564e40df97d931e482165cfab405a5fc321e76582266dd8869e679113fcce. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c058e9c6-d892-4e5c-9b11-afa6bed6d005.json and https://artists.proofprofile.net/proofs/artist/c058e9c6-d892-4e5c-9b11-afa6bed6d005.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 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 0xe7c7da544f2e66260ad878bade62f2c068b3b4540eae372e06098f59eb9e2943. 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/QZNJY2149849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cabaf16616daffcf8367d82f039dfbbe3398385cc07ab6c8da0ede38092b54. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2149850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585d89fae503e9b818da9c55fd0e820b7670b242ba92eab238aea784360082b4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJY2149851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9178d559a32923ae056a0eeaf61ea5ad2569897203f2163182cf43f0834cd892. 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/QZNJY2149854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d89afae28626a44f1ee735f0241239510b281c1f0e1b7ebf6a2f43d0b97907. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2149852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d462adcd78173c874462cc74d5968542662fbbb21855aa6f42d0e7fa85164. 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/QZNJY2149853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d90636878a0d209646d37fd6af569f36b903b6e5170e76d3da5c95ba54f6c. 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/QZNJY2149855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33afb6a182446c54e29d3557adca6649cfb343fc3377b036fe65b8623a1c979e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJY2149856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd58e8486810f34514f53fa600decb71c824336988ddc4c64e8cc10d81248b. 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/US7VG2112412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b69b25d55bc43db797f50e202ce2212c107dea5378dfce9b21a314950c883f. 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/BCL662300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3e8118c8cf0f7e05d154962874c7bd807187b5d4229c2415155e4b5024aed4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJV2375614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e4f2e156b1e064804908e54ffd3be70b856b35dd9fd6262c9fc9e7a608a208. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJZ2200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24def6fb2873dabb3fbddcaae595890781fbf0dc18c07d55d455feed39c14ac3. 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/QZMZ92383979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd9733576a75613dc5f7609f4eaae1e02cb6e5bb39ac524c968f3b6608a654. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJX2306004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781d580182af31f7a04f9187bad1362c5f2dca9e0bfd27b158bc5460694e2241. 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/QZMZ92313953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71c87267402e7a6e43b0ba81ee7079e941c2151d9a49249c03554f6de27851f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLM2376184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb36e75974f684a1376b0499f5721bad6396908d131ffbb0a7f1a4cfb145c67. 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/QZNJX2306005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9166a71bc5ceaa7d6861a218d15ffddc361833962a14c85206df2c10cd7af17b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJX2306006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a60b3ddde4ba079a8108b37531db9553a9ed49658a4d8fafd416ee14c954333. 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/QZMZ92074731.