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 0x7c892e86fc64cfd95a772a95f5aa1be51c68bb2bf0befdcc850709dddca6420e. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9005cfef-aaf0-47c2-a589-73fff440a54b.json and https://artists.proofprofile.net/proofs/artist/9005cfef-aaf0-47c2-a589-73fff440a54b.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 0x50347446a0e52c1df9a51c277ae3dc36ef6531c5e933e1aa8ab86f273d507b10. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFV2477228.
Helldivers A Cup of Liber-tea (Epic Metal Cover)
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.
Dancer in the Darkness - Epic Metal Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2205487ff2fee126a6d056a43a7373f9f0e641d58408650f8c45b8c1db46175. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPJ32440857.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb169bbf1dbade366068e1b926dfa5f6fe5af84c05dbdb8e9048790ff6936a171. 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/QZPJ32440860.
Naruto Rising Fighting Spirit (Metal Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703f0a964a99c99471f5a124662ce215c43d01c2a71541a9b6e38f0044b0e5f2. 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/QZPJ32452377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837ac9bc798778439e0aae45f806adfa51e9171aac03fe0af686ebe9116acbe3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZPJ32452378.
Do Robots Dream Of Eternal Sleep - Cinematic Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8876d969c547d890db7400ac3cba3e5c4778fead51fdcb6cbd6367ebe248f7. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZPJ32452380.
Suffering Leaves Suffering Leaves - Cinematic Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd11c8ef0c3d8c01303937b13d6bbc06ead153a257def067ba657e8c9a87e2c0. 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/QZPJ32452382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f44561bde11780379ce4d49a96bad9cbce2dca786a90db53a362f13d5facc6e. 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/QZPJ32371675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49d03638853a222dcf280b44612ced394da1237518e892ea7283fe8dbd3bda2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZPJ32452384.