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 0xe873b1d29b7818e38ec321f45b51019103f8df9fe456d7ca7bd88f2387ccaa20. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc9582b6-a342-482b-a051-209f095157ce.json and https://artists.proofprofile.net/proofs/artist/fc9582b6-a342-482b-a051-209f095157ce.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 0x56b931eb865d3ac542c46c6b26886522b97c17f95e27c76bbcdb172bdc8e07da. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:42:11Z), 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/USLN71201500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a12acdf30eb58766ebb9324287fbba07fc0a299424761e6eaff12e7586aae2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMFMF1394602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e4a3916388c36a9badb0c9095a1cd8fc2e338a6fcead8f8e3ce6d65639863e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QMFMG1426958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c35fd0e8d70b31a8c6520cef588a5a5d9acacf9f27af50cd7d6706f9d9255. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:07:03Z), 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/QMFMG1426959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862d15ec14bbc7420be8ec37cbe0d5c1a0c5c6f71cf388d2e3046064b6641948. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:37Z), 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/USHM91658100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc231c841efe0a6b99316eff2ddae8284a9f5af2de8475a43540110bcff9078. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM91658101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec09e525b3e8e9d19a295118e70b0e515a02c04c64361855c5e2df53fc213c5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM91658102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12266e9775a8117538ffed6c65db880cbf9a945b1b6b98c3734f542bb753310d. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USHM91658103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cddb5891f4fdc8955f20d995cf97796700f81cdf75326ddef4ba55065e9a24. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USHM91658104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2185860ea2249f3fa8476b50d2d7aee48d4c73cf83530b717347d0542bcf1971. 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/USHM91658105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e5abe61b1f9aac36dc99dc2542ff709a82367441d0b9fef6ac43d018216654. 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/QMDA61325594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7e2bc26f1ed6885c7f6673e4254ae8a0b2cac063c983602ed751fa97df086e. 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/QMDA61325595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01a82907e97022c23dbe83bca9c5ff2f89933d03d64456624b0224eff695e38. 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/QMDA61325596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c83fdca0bbddd3424f720281af6d50b4530d38389c190182a5437d7cda21d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMDA61325589.
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 0xb9d1bc01aae7bedc8af07ce55afb84da75960368aa07f5f6b39d8cfef908cf12. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMDA61325590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0211cba26269f042ccefb9306b95c899f96f1d01ca19b1b3c55c083f2d0a6a3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMDA61325591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142e35d98740bcbb51a87d4ec063af309ee13968703371095fa890a1c0b652f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMDA61325592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa517efa516baf41335853a9204960143cc5287c9b9cf026d399156ccfd0c6ef. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMDA61325593.