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 0xadd0f772103b4d77771a93b9a58228dd3321e806863932931eae210b9d5366e4. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dee0d7c-ae6b-4a6d-ab29-7224b831137b.json and https://artists.proofprofile.net/proofs/artist/4dee0d7c-ae6b-4a6d-ab29-7224b831137b.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 0x604f2eb864191dde42d990b23f4f9381170d4ba296a99fc3127478caca8f234c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHZ2438256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb20d105fccc0ae79139e4bc8e63695f1f85709499b8e4b98932cf8029a71c91. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHZ2438268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec214bd372728b6f73a1fac1d57547ad2e519dff7b19ae846069ef8bd48287a9. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCAHZ2438285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00edb00c9fc2b5f0051f2dff56cea3832b27e1f4893513dd42f8781c377994c6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHZ2438310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70b7a01f8f8c18f5299aa0174224dc82ef337cec5c4bc0908040a4ad2242cba. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHZ2438316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af45f2b578943906bb2f132e0e2d737a84ac773df0a92438fe9528ca25386a7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHZ2450903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba97bd564243c6cbd9cf6cb55d5bce1fc6b7c9dfe41805491e1b18f8b9d1909. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAHZ2450931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f7ead7290cdcbe99fc82da284e020f14066d11b334513b13ceb28bb1ce775. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHZ2450947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dbf84f92c388ce9f1afef18cf0416c1e3f7136735c8e8b4716694c85a1dbc3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHZ2450970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1909810284784f0eb53ebe88ff49eae6bb3ec39699b780c35b62d6cbf00b35aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHZ2464317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f0640e115cb68954a975162a8751158911a622d81eeaadd04338268e76d4a6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHZ2464334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d883c67b232956122e3f3553ae6600dc53388102c801da9f9fcfe6bdb203778. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAHZ2464341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627dd415d297fd5c34f4e0e12e625ab9f2bcd1850102177f01dca01dcc512bc1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHZ2464349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42942ee062147f9e96406f23d220457f786b0ea6e634bc6bed148c422b9fbbf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHZ2464350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574cdb4e3b4059ce7995876c4556a4be27f6a8fde35dd22ed496867997d010d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHZ2464358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfc3025bbb7d9cb37802008b774a27958f096443afe8acd81ffbc078bad15a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIA2475417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69fa13ba104a586322d3cadc04711c35e7b64558493abcf6f8d131b21c8d318. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIA2475452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e85b779e62aebae239d3a38451847c28f53aa5e429789a4c043c0c94b5e150a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAIA2475466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0547f6b1987dd54a5200fdc5e89bbb5cb7c8b8ea054a6e47f174a055254305a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIA2475470.