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 0xe764d1eac6c432045505fb03210acc19683cf66739f184b4f9e9f1c70f9d1cb5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6df45770-2cbb-447f-a745-69a2c37c508b.json and https://artists.proofprofile.net/proofs/artist/6df45770-2cbb-447f-a745-69a2c37c508b.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 0xfb63d8ae59b0dccfde3224ad3ec6f88c5d452c6dd3ed234c6a7df6a2ad474b42. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCABN2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb98cd8d67e53eed256572329fbc4e4190a9ee9d658e0055b3af911366c2b16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCABN2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0358c1f9f322adbd2c44edb2444c064643adda2e36877802831c85fba1a1f07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCABN2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f35ae98d3f299afaaefa64bfac2fb623a90f867ca4e9be1d7e5a9a747b67d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCABN2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb36d21ea115063ed738118e80bbfe0b1f26893bad58d60706344f4e741b0b8. 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/BCABN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2abfcbbcb017cb95eeaa9bffcf2d7ff863b582781af8d11584339f506ba9081. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCABN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99561e567065e05d64b23edc745de9ccd5c52b9b302a91740855c9369596538. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCABN2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e66e74c84ed303b3c728a271fda612d5a3bbaef4e96bd349d039d46f4ea4b9. 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/BCABN2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4d185379129ab887f153b146faae1e9ce54e5dfe435e415016eef6ee5e448. 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/BCABN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19abae446375d0e45d34852a591e2529be695e7f0287f2fa2ba0ffde8525625a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCABN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb36d21ea115063ed738118e80bbfe0b1f26893bad58d60706344f4e741b0b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCABN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb98cd8d67e53eed256572329fbc4e4190a9ee9d658e0055b3af911366c2b16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCABN2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2abfcbbcb017cb95eeaa9bffcf2d7ff863b582781af8d11584339f506ba9081. 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/BCABN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4d185379129ab887f153b146faae1e9ce54e5dfe435e415016eef6ee5e448. 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/BCABN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0afff958d6a074afedfd4b1430a099e1dd44603bb32d31fddbaecd0426d6e1. 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/BCABN2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb3fd0bf94fdc360ce9da512834cb2a0be0a77423466af792f8a9d2ab498250. 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/BCABN2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99561e567065e05d64b23edc745de9ccd5c52b9b302a91740855c9369596538. 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/BCABN2000005.