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 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 0xe95052502e3b14800fb74bf73ef0b0cd234f2aaaab14aa6587892dd6810c083a. 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/e6fdd134-fc0b-40d2-9fb1-dd67731951bd.json and https://artists.proofprofile.net/proofs/artist/e6fdd134-fc0b-40d2-9fb1-dd67731951bd.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 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 0x8279742fa83631d85796cbb951a9b77c93185386b9d4d1fc02081b6cfa956572. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBP6T2000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f3132d72063a42cb1faa4ca3961b969b08d46b9c20b22f16d0c038b0b4e58. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBP6T1900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ddb7f2c4a6ed1bc0fbd8999d38c0bf83ef196549434ebab0e135f549258549. 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/GBP6T1900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04d1550d29b5a734324d5373e2d843962357dbc1c4b696f35517bf4c8d35d95. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBP6T1700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ab26c7e71d3955c97908f8ffad2e3a36e38a61d5d317f60db23f8a42798ba2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBP6T1700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b04720a7994a42928d80c0b00869b827c13d176c32553fdf0205028ed753d41. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBP6T1400095.
Thundering Mantis - Alpha Steppa #Streetdub Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47362d7095c012a01e52318235b2112622ae23cf59b651d44250cc29f7b29b4. 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/GBP6T2100397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88df6be138aa2551ab50e623a9322cf2d9fbcd5f6241b6d21c74051da0273e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBP6T2100398.
Black Rose - Alpha Steppa Mariachi #Streetdub Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04559d40042c5f32c452011765d647ebba530da5cf16dbd867cf57194f7c860a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBP6T2100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580426c58a5003d64af5dcd8e0c2f30d653049b9407fc9dcc3eadff6c36c2dd0. 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/GBP6T2100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c46fb55acbc757495ddf35b8050a09e35bf82405bed5500037c9abed2e9fd9c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBP6T2100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ebd2a7d6403b4db93d1f86882eea99663246da214180d7252aa4b7351064e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/PLE351900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d4ff3273b278717612edd4e59cb44be2a6d79660fa28fb5c9fc212d8a9799. 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/GBP6T1400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2005cdf95e2cccf48035a2353c8129b134e6ce2152dce41221412708e5a36e7. 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/GBP6T1400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b994febd7f19f1f7bad369b3831e32a0a217b3ac4510ee7e98e910f804851. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBP6T1700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbc53e4f198fe66fb55074b6a39c5f9e5b3c9bcd812f36ef1f0b13987f0c0f9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBP6T1700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf24cf47b3a5cbf952d7053c4ea83481e676adb18bea6aa023474d38aee59dd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBP6T1000052.