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 0x4643097ddc5d68723f6571ae648894bd6e1e1020e75c01d082da6c94e6f568d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b1d0b6c-5163-42dc-a9ec-480dafeeded0.json and https://artists.proofprofile.net/proofs/artist/8b1d0b6c-5163-42dc-a9ec-480dafeeded0.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 0xa5bcaa0b71891dd091fa11a400a278ce3b1512ce1cbb0d9f5e606b64d9d0189c. 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/QZDA82363465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bcaa0b71891dd091fa11a400a278ce3b1512ce1cbb0d9f5e606b64d9d0189c. 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/QZDA82363465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e3abe32fe34e6b66c92a9b00db258ed3a0798dd81e2087876ced49fdd7400c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA82363463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e3abe32fe34e6b66c92a9b00db258ed3a0798dd81e2087876ced49fdd7400c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA82363463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4532934b80f5092170ff846d749d68293ed6bad32b627b3ed0c8027c7305735. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNC2359015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4532934b80f5092170ff846d749d68293ed6bad32b627b3ed0c8027c7305735. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZHNC2359015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe939ba55286ed3c216b8502ed47eb53f52b4a63066b6ef66b47ddf3769bad7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFH2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe939ba55286ed3c216b8502ed47eb53f52b4a63066b6ef66b47ddf3769bad7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZWFH2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634ce954e1e7752523038aec700dcf33248c24aa47c67034b1054c9511be4c3e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:55:58Z), 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/QZK6L2492471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe4c8467a6e9922be828668750953d4c11379c78e90efc2cc81d0ec68d079f3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/EGWKS2474007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe4c8467a6e9922be828668750953d4c11379c78e90efc2cc81d0ec68d079f3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/EGWKS2474007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4648a514c22f91964e817faa2647941d2a2142229bf7f2b13cb20e732060325. 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/EGWKS2479724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ca867a663fba10c4f40ccf8a72041a86e5d05551b6acb19e91f12759e7f7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/EGWKS2595659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe572eaf6d845d4ecb7bf4952c7651ca57bc2d411c3149ea7d3d2d5765a58b8c9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/EGWKS2572673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60760b294d020dba99c45b6aa5b82fa1057e75ce436560908e3cfd1e3b8b6010. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/EGWKS2573099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76a9e084e635863a734352d0d7b53bf2a6b7887058575164be9785d8b019d88. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/EGWKS2541664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d6d67fc1ff4278fe66308d34c01ea3c5e0398aecf65b74cd637057db53f9e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/EGWKS2559452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59816e35b1fbe22a64f518e9c273d73b2945e2ccb66da1930fcd0129d7dee2e2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:43:18Z), 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/EGWKS2559917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb097a8f1cbbc93d0071467cf2b6850f362ad72020a41e9957bceda889af1fb7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/EGWKS2550694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a95f89db5bca883dc14097af7d4e625283c4e180cafb9db677179a7635891. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/EGWKS2516210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb097a8f1cbbc93d0071467cf2b6850f362ad72020a41e9957bceda889af1fb7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/EGWKS2550694.