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 0xc93c68fde368c026836a52ef6c763c8ad1ebf5f3434ee23b8deca049bda8b40b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4073360d-a6e9-443f-a863-b7cea854e806.json and https://artists.proofprofile.net/proofs/artist/4073360d-a6e9-443f-a863-b7cea854e806.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 0x1fa32367ecc2e74892e331ed16b6edd2943539c17de0fe37157c6cd353a7a738. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:08Z), 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/QZTB32301581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78511492c07885795952169efc0690f2070bd64fc15e320377462ef72e54a22. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:38Z), 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/QZTB32301582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d198e036443d422fe4488596296709d602414cb76ccb1feedc14ed6262ed7d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB32301583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5586060c0e68494c97d5fd0e900fa3488c29f64c79028a984300ab9407084c37. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:41Z), 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/QZTB32301584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc5d4423541e0e17603ef5399afb748ec602742595f0b08af14e9419d92206. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB32301585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39bb21e033a8c1a35e18234d6255ab6305286b1b8df3c9b032cc26052227151. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZTB32301586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c4adfa934af91bd926769d709f36368fbfa120490033bdfe376380de48eeeb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB32301587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d6e5245476f2e9a4b3fc5f95c0da3faca78e2f0712131351239b897862751. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB32301588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1357a5e1cf61265eee3dbbb97be4da826b156f03dbbb8ee811ced6f55d3ec99d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:56Z), 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/QZTB32301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d368ad93d0328e1a5241759368cbf31cbf1e2d342b4196234a387c34183f8d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:03Z), 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/QZTB32314431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1b3ac32a248db1b43fcdb3c2519369f1121c143dccccaae3600c6939580cf3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTB32314432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ca0fb30f0d6a1fccdcead32ceecb3e40510b7032b2007e6c05a97ee0e95fa. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:40:20Z), 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/QZTB32314433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83889ff07902cf0529f223f6b9cfdf04c1fee936cc80c7fcbb651646ee0437f9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTB32314434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1754c3ff5ab00c7af3fdd085d1bbefa52b2dabee4068d6a0a2fdd0eb98dfe17a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:17:45Z), 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/QZTB32314435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc07598e4aa1e8047200e7899617bd480cfd9b6f44e28746d5a2e4cd5e02598. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:21Z), 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/QZTB92303132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf8a0130343ab6c0c78b119bf6cc4ec2579f7d939a66c0858eac85825f4349b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB92303591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a238bf7ff0808b388261fedc9c45643c623d8371a27ed566d4f4bc8875c5b9. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:43Z), 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/QZWFM2329180.