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 0x76a6b3cfada397efb67428e37e06625e871b009aa66b952707c9d4c27715f601. 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/7e747996-2f92-4205-b8b2-d839cf2dfc2e.json and https://artists.proofprofile.net/proofs/artist/7e747996-2f92-4205-b8b2-d839cf2dfc2e.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 0x83c0f6bbd21376d3d80f9acceb4534e9792cfb42ae632025afaac9fdad4755ed. 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/QM6N22466981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54877107485ac4aed7e1931d8b724918436ba74d1ad8caaa394a4b4a4e3117e6. 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/QM6MZ2483160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4badfa60c3d49d50c5173d1b5ffb34399bd832ac02647936f42e08bed3820af0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFMF2319204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd412ff1e9909c3b0bbb357e19412eafca01b71a1a4d5b64b34845f64fb6e79cf. 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/QM6N22482341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a49c863cea9378d7db8007149ee4b1e786093d13f358663872f51eebb8d794. 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/QM6N22482342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e886f2ae447f8fc6a17fea3e8ed378791365552b7c657dc1c10a26574cdec8f. 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/QM6N22482343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb56744c00569045a4f3bb6a5c1126d500e44cd52931fc9debf0ebd990cc11. 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/QM6N22482344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59b6f459b92705e352098bb07edd219159b5c1e91a01481eb3ba6124be0fe26. 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/QM6N22482345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a49810f12045820239971cba30205e8c04ab7d73f936c0d17d8b828cc763eb8. 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/QM6N22482346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ec2248be62c069700c9373e261028f004e28e381cd7073ac05bec90b9b01d. 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/QM6N22482347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef84ae21494b48942d7129e9fc62dfde8beff001de0ccd63223bc895aef059f9. 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/QM6N22482348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfc232c9a68bdff0306aec469d175dae67f182742a60c62b64615a943d25edf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR59R1900985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf76b5890588ffac84ed774662d5043ab71bc6f2a3595b6c33844304b84b72. 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/FR59R1900988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cd486c964511948239a60c498fc80ac521830cfacbdbdbe575ec0344c41092. 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/FR59R1900992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d389614fe7a208d78c97557ada3f2ce8a72aa3bcbfffd11bba6774fa9ab3e0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMEU32009393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0709e9a760f33716c474df0b06ff3b041284491311a497239824e17158f4d0. 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/FR2X41996077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fea990ec04fe51531899dc8bc5c3a1ea7fa8f7144c81863cd45ab0df2a00ba. 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/UK43Q1806306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd64f178fe2e2813ab79f0edf8ab01e4a52a5fa9794d4380d8fd294e64ce2156. 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/UK43Q1806256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe6b6258a4aaa1e897f25eb3dbb7dfac3dc42afa85b276c673babf88c965100. 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/QMEZE1746358.