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 0xfd1a01e8414f8c2ab9db2561c50569245413770b887a0906fc9390dc10636ae3. 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/a44dfb66-205c-4638-93db-36c357bf6a5d.json and https://artists.proofprofile.net/proofs/artist/a44dfb66-205c-4638-93db-36c357bf6a5d.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 0x6431513d2d909a763200bf033dae3dafcd1ebff53a725f0014e4b1f50718ecd6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCACP1648581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4c982e67948c18183cafbd25dc5df58c0f1e787df4090c127770f2887c53e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:53Z), 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/TCACP1648582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1e45e91addab1fc444dd223f6655e00334d3ee41bffa2cfd49874340744172. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCACP1648584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b6ad8ec688392072ecb86f0d800c7fdb75da45a9ca43ee3f6068c449715301. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCACO1679492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fe36f1dbdb8f2ae94d16ae23af4252e760fe437e653ae273318eafee06785. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCACO1679493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f564a5ec6073f46b5e352fe2c4c93e6706965e6cca13ad48c0f9685266d6ac0. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/TCACO1679495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bf4aeb3b96fce5d78901fc1829719da2aa8e7f87229f46897a891f956c0ee9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACO1679498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09259e52b049e8c424ca6d728dafb30f04cb1840547c5fc4e94d926eadb34e5e. 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/TCACO1679501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f27ac31273006da409abdd9a523afad1a37b9e8ceda1dde0cb0d40bced4c02. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACO1680639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2354abb5f7075e4382e6b1b6e5bfab6fa109bac3419ded7a0a3431181ce81a. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/DEU601304493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dc96cbeb4e1218f22c991f91c7e2700d375c8f76b545f45d36b87ed17096dc. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEU601304497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3c35688d8a9e977cdfcc1222d60d66691106066116b7c6dfde4a938b7ae3ea. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEU601304500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e9377057a0aa58a38f17cc367dd5b6e858d6f74327ca6a8fbd9c34bcf3f862. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEU601706807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac0b6e6cd88219d35719e2c4999c62a768e264d3d1b4462d6eceaca4606681f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEU601706810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c078e60d6dac7733a7d2cf9b8127f1f4f6c6763434b39b1f00a4f84479337e. 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/DEU601706811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eda8a846ea13d0f8469d6875c23d674460ecf17e7b1005ac95b028b66f9c5e3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEU601706812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67f7856e81d1a678b416e9007b17fc4aa48ab98005eb812dbdbc1dc10e1d8b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM22368511.