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 0x1c9b6c5845d81b4707a761f5ab695e518c265a0392367ffc38a245c0b7c92d62. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8c28bc0-4e8d-468e-a6d4-ae2c8e96b21d.json and https://artists.proofprofile.net/proofs/artist/c8c28bc0-4e8d-468e-a6d4-ae2c8e96b21d.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 0x45d28bafee0ec175a8f3b505650f11abc0543d35c6e8549b716f82e4b3b7f8f5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJV2375582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60fe983646c6c93e2a5cba361753fac132b2456c19d1b154dd1f4f14ca136a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA42202888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03694dfd6b5bb54e24be2cfeb982778e32e02a2f8885f7e280ca7cd09f8d47b9. 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/GX5MY2129923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7955992c46013720cd84ca55828e40013b9df0954c1c09e4b3fc7351be1b145d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX5MY2129926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a498b78d8e815cd4090cf56c6ac08a7d975e3bf6baba5e666ba86cbba44df0. 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/GX5MY2129928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840a638f711913a6cea635a3b60a60a4e785fa92f0db94777208a343d3a58754. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX3HH2185923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ba7d6d39d4fe8f13fa3f4bbf47754a91123a584753be8ec1f31b1c2b6cd91. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU7396201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8796ab2ea099af9be491955cccfc724ac870fad71c439ae794a5c58bd301e6a5. 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/GBSMU7396204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548e88b4a381dd8b3e7f3a9c24429b689e6a39b817c2b9dec90ecafd96fe23d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU7395447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc276add316a00c09e5df3b8a8029d2100562d0f3da892236fddfe26395792be9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU7395453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a544641cf5026b9db96d9818809182331afe3c45a34c89e055f23987fd1132e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJZ2386674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c238c1e3fbcbdaf70a73cc932553e24e0a07783df5100f5b6f229d9e6038a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJZ2386678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f5a82d940aa89aab5dd9b3d67ab72bbf0812bd1fc4521fd28fc69ac031055. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJZ2374834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7397daa6a813d0861695bb12a6c5921cadabe6b16aac956bb8dc8587105437d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2497573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acddef185d87a004a6c36fa61273aa8488b7f6121b52b8c4ab9767f3b7ef82c. 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/USANG2230692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb535097faeb11f2482d1abf414fef072197dfe2db77fb2d1a9fc1ccbbfd29d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9L2415174.