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 0x81372a95c9d2847bb3e3e17b494b16156969a956962d607a814f03a65ed4b3ee. 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/eeb76f3f-324e-475f-8619-a691b59ba8f1.json and https://artists.proofprofile.net/proofs/artist/eeb76f3f-324e-475f-8619-a691b59ba8f1.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 0x308f0c49ab4856f4cc0fac9c3f28a567d10994fe3f23cd13e4a2ace3111f89af. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZLBC2430878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86cf47836cbd6149f9fecaf807b2f791d779c2ba4b78e2c533e64ea0cf3961d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:11:49Z), 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/QZPEW2529524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce43fa842ecc2418f91478b194fea3aa286ac5848120eda3a0cc3116db35355e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPEW2557308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a612e5bd638ab647c3a03d5570f00670b97d10b6f69e341b06e02a306bac100. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2221224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61633d8ef84dc7ed9285865dadf5e51b62ba74de0c910b8520ac3837afb67f9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:22Z), 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/CAQTR2403314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95c1fb44b9855bcf144435bfeab993265147316eb96f403f093c54fd280f0f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:12Z), 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/AEA0Q2428423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbace6ad3dced54f988c8d892a20e2cef4909dbb5617a904279b1ae42ca8e0b92. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL9KR2323825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ced9644643c7c0082b4bd0d8502cec7b65e22d5e47693d0625c6b3dacc7889. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL9KR2325967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe674fe504a7a025b95809d4adb51a0be6cba54a0fe54541ab5afc4301c5f95c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMHP2482463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b4f67fbfd53f7f9d2a08da4f2767835e1cd4a06c9a795e08d99131c726ba67. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/INT632505025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e03b127678cafb5f57d53342612046a9b4fd4f9c741ddeabfe85241533cab4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZLBC2311459.