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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a659962a1bd6e0e354bf44e93258f4079c32451370e68e4bf38c7956946f11b. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/018c5e1e-50b4-419b-9b53-819fc1cd1a14.json and https://artists.proofprofile.net/proofs/artist/018c5e1e-50b4-419b-9b53-819fc1cd1a14.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aadd9288e931d8e60dad2ab4fe2dcf66d7627eba85cee8c807f17155f73857. 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/BX1K42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83fc5ed3a8889d9caf282e1ffd0683497236c9c0d3e3d57c1df901da171ee26. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BX1K42100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a6024793988d17addf554fa7f12c8df3765b07f6ec46a36b14b8ece6de4be7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX1K42300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426a26c8ce9f35a21aa36ab483eb42c303c44bdac2caaf8cd2e2bef7e938f8a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBRKQ2224273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05591e94e1f8981512948cab3b22c5b077a0eaab77e2b18e7b5ef6d46b48dd37. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTRX2106069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb002c95eeb02fb954d95e6baa5449894f83c5440d3b74a506323285051a23a57. 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/GBWUL2109005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78379d6493e48badae7b6bac679b2588c7f5d5ae18ddab1f9e1df024e791f229. 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/BXHBP1900967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01453a1750fb712e080e565ee32589dc4d1f32dc3776bd0d7130187c0f3a9321. 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/BXHBP1900968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3895ce588e8d974c1f4a873ce23c2955954654d8466099f5666c17bbcf9b081. 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/BX1K42000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3224961dd278bbb6b23023cfd68e35609ac5c85bedf3072a139e994da91eb6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN1967883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc849fef014148c2836ed8c07d4644ef0e9bd4e9fb6b125ccefd23f9c143c2b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZ5FN1967884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecc67e6ec89061b91c6c1b1d456bba7d0628788ec6884d9498aef705d267faa. 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/BX1K42200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb53bfc27c2e2cbcb80c6a07e7fc2ed66513e350052cca1db89e89410470bd5e. 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/BX1K42000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384e75134c426f47b3c3df0f6484d775fcdf8be5da2a4158d21b3d0c3d0327f9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCCNG2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b343ad74bda1b11301e8fba0058757dfab34aa6277b7b8680bc1a753fa78e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZ5FN1987991.