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 0x99ea85b9401476a5a5e465c0b92726b419e5def0c5d7e02aea0505beb3bc9c7f. 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/1f78de9e-f830-4483-a794-ca704a14e718.json and https://artists.proofprofile.net/proofs/artist/1f78de9e-f830-4483-a794-ca704a14e718.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 0x9e4f103e0d8d1f07d9b1b58d5ef6698ad7b88925f9cfa6c6b0acaabc281d62aa. 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/AUNV01800515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eee6201168b5fbfa9f2832aec2a5f958a0f0d43b91a7c9a9e6c145fedd6305. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/CA5KR1905183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd574387b933a95921068a51551a1e2fea5bf4e3df0f80e8ac542106d9f84e. 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/CA5KR1935183.
No Blood Left To Bleed (feat. Micah Martin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8137c9619742e03ba8e74aae7877b7b71195ae30df756e4eb81b32e7b96e7e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTGW2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d954b99c15289e6f4eb25130b1b93d8324bac26966f97ea8d9e431b808c2f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CA5KR2206669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4943e2c66b44b9a5bb845f3cd72ce493e9ea58edcf33e6023177b05a27c6c73. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CA5KR2208126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e2e50a51f7140a874ad4d16b4612733dedfe10624d029582a7786acd070a2a. 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/CA5KR2220648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3629d3e2635fdc5fa84b8ac1096bb1b0bd7bc8e63262c952a1abb45019e200a7. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAGW2348388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61d6381507b1564ef0e0adf0cb79d6e0c7525045c1389df37eba9dcabda3967. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAGW2348352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3629d3e2635fdc5fa84b8ac1096bb1b0bd7bc8e63262c952a1abb45019e200a7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAGW2348388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c896acdc883ee2e2e7ea06d58f4b2071d3cc33e8723a44ac18975d7e472fcf. 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/NLF712300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf4f556146238fb6dbeb64b44442f5ffdcfed80165ffa190dc1f801b6b3659. 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/NLF712100807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281618ec6f74f68562d2b0aecf927f08eeaf1d3d135dcd9487e444c638f3d955. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAUG12300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda62cbb2d16796ba420442f1a18518af5074539b0a7026cfd055de1cecd175d4. 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/QZK6F2322439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda62cbb2d16796ba420442f1a18518af5074539b0a7026cfd055de1cecd175d4. 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/QZK6F2322439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1744b6ef310fb858e7115ccf79560325d9d3ab16531918e789b601b386345187. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBSMU5319734.