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 0xfeec634de36d9b74fc290db00302b46af73ee37ec9dc9a8ec22fb1c62cb4daf0. 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/46b47b4e-d3b4-44a2-8221-bc043699c6c0.json and https://artists.proofprofile.net/proofs/artist/46b47b4e-d3b4-44a2-8221-bc043699c6c0.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 0xccf75c3ce063fa991b06e985a8f7f11043778a5647b023355d1086630b700a61. 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/UKZGC2405871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf30f77cd89abde82667e12ece38a16e15243a91cba5b18fe06e01202b771e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2404888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba7a3a8384eda653e268a9840f6675c2319f8f097e02b773b7277674dc52ab3. 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/QZK6N2357923.
Invader Zim Theme - Industrial Metal Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601d6ae9c3fdb5a91bdbd833461cb4ed2566e8901a8ad1317f06387d5af35fc. 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/QZGWW2092365.
I'm Blue (Da Ba Dee) [Industrial Metal Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9303122bb1c67a811e9fbc91d6dc9f1112ed2747840bcf6a24e9b6f6522f7873. 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/UKZGC2501886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3e4c7b42fa1bb35ddf5a92a5eedb8a5a8d320377d084e6cc7ac3fc4f918466. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32440849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc4690385a4ba7e84d79fb0cc014e2a1af217d35960d777f12fc60c3490ea79. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32440850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac02e68e6df18cd4472cf967c07757b1b78126671952cdb360b4b4d628f5a05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32440851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552846dd579dbf8da5d96949e4b83150d422ae53acb9179488c98282b0d88b4a. 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/QZPJ32440852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679383cfcaaf1a13fbd9eee5fe9841a9f866699b33425cdf600ef2de60eb25bc. 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/QZPJ32440853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8ad8b37e9c261eaa3dc863e7ddc25b45176c255f1a61105987f9a697754e1. 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/QZPJ32440854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f11d80679e2dbf3bd1dbfc50ba76e873490eba2788cc54a2445b5d5ea01fa0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32440855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6208a3cc1b3e7642b65ba1ee243c118620339450ef7512fae9880064f78c46. 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/QZPJ32440856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4394616055d34e596532477f6b0590d827d4aa403af9c1f5f4fa39ca487b2ee6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32440858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41123c80482a5c71b23abeaf883f41bd2371a30c2598f108031381f758ab5488. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32373096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa9bf9088085fba01f035711c9edb3cc73b34a9da0eb1cf2549164dd0aa33b3. 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/QZPJ32440859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfca0a64b1de68e91c8b57c2d420dc9c7da9eb3d27aa9e9f1b4f17b4ff4d4643. 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/QZPJ32325807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a9e2ec4ee50f1d8319a794b7ce891bf05986f635500abeec2857e624fdfc24. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32325808.