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 0xee825ca4b4f61aeb65ff6abec65b00b850c1c78c19d7ec1e557fd41a5b83600c. 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/b6c2f048-7eae-44a6-8913-6e2d21d462c5.json and https://artists.proofprofile.net/proofs/artist/b6c2f048-7eae-44a6-8913-6e2d21d462c5.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 0xb8df176d4ffba56d5e56a292d7521f4b797bf142184fd83fb549031463d765ca. 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/GBPS84166802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdc1689b76ac56a063d28d4afa4469d6488d3dd38b8e63e3f189b16860d9a5e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBPS84166805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1f4b6f379e2d4492c07d4faf5e0366cd4e0188367720421b578395eda5558. 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/GBLLT2100683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2c64229b364b782398cbf5cfa393914d886dab97bd3f050b465ec8d6b0f33. 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/GBLLT2100684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6485010331d3c558025384707f6d471d13d675fe10f5f8a0163fa5c8596f29. 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/GBLLT2100685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0154b7fe94b22c65e0dd9a2488b73fa5a22019aafee93c8b18a51bc5782d6a. 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/GBLLT2100686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db12f6c887375f19e685cb581eb4314062710db2d6cda85cfa10412e19201ae. 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/GBLLT2100687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4eb30408be03df0aa6e03c46d1f41d4e6bf91af5bb8801e206395c3616d5b. 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/GBLLT2100688.
Twinkle Twinkle Little Star - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c74bdbfb78090b7e04b793f2a691daff24fdc0de13596a022afdbfecdfb8408. 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/GBLLT2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd48535230e5f4c2207c9cd8a4975d56795ca0f00f871e83fab55c3c78fdbffd. 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/GBLLT2100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9564d8089268427e1c13d37064f2a45881fc9a29824effabe3700c2a1e92fa. 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/GBLLT2100691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc0e11bbc1100e93be0b7f3d46975d37b5b88530cd9f76e3ea9fc6c747f287f. 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/GBLLT2100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd97f769d3f61faac07470bf081ee0d3dbf1501af2c731d6628ce32ede05a99c. 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/GBLLT2100693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d701abcdc21555761f23993fd1d6fc11b2ca1c7ec023530a1161f685e6573f9. 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/GBLLT2410484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef6d4b16a7bb7cbaf611ef4bfc00d7ab53ba110d995454e41bcba143b4745c5. 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/GBLLT2351449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b587446f3a234d5383937d690d5ccc71f4c481dd548a524d06d3bd16c817d. 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/GBLLT2100905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb759c9092d6487ee183764a610c3849cdd12c59fdbf3465c6f245047069e30. 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/GBLLT2035353.