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 0x91933d4793d8a0b982431ba4f7aacc4329dc7a85e8f75f6dabf4054862c94031. 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/c3453737-721e-4984-8abe-b0fc68fabb18.json and https://artists.proofprofile.net/proofs/artist/c3453737-721e-4984-8abe-b0fc68fabb18.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 0xd2a01821abec78c0c5d9fe24111af8df2b02036b52efc182e22abbbbeec0db80. 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/CLA1D2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1575195c2a15c5c9e25df4aa50abf327475929795d73295d2e4b0f5641351802. 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/CLA1D2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448008c82d2417e1a967870f5cf09bee767b43f599d1620f50c406cabd13c328. 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/CLA1D2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747b173bb6b19d5d05e30aba0b303a65404440613f70179ffeb24664bb7f079f. 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/CLA1D2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9382ed9eb935948ef92fe6b056054efaa31e0119d6e163b0e37497ea9f0de6cf. 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/QZNJY2379576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ff362814cb1870d0268f9bbef6294ba3b6a9c633243820d971c39a4b15636e. 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/QZNJW2320919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea463fd829e163f5d02d4f3d3fad4eb50d9056d017cf84a5f29d7359146783. 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/QZDA72269491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb13e6b1caaacb5fbbde8cc42b41eee0374d73360165866d65db2648280ea44. 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/QZRP42132193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8063a05f19f636b21c081ed4f204569e1e3d4bd7a6b0e57e658d903b61061667. 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/USA2P2311116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a01821abec78c0c5d9fe24111af8df2b02036b52efc182e22abbbbeec0db80. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLA1D2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e097905dcaf7f77d8fdb4d0bcf1cea77a5560aa783a258af4071f3a08d3b4be. 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/CLA1D2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce36a736466c86515e05086333c09fb00df8fcebebf7ecf0bcf23d719852c2d. 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/CLA1D2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8f7faa0d707ff9d7b2b284fdabcb626a42b41e75b0f3aa2f1f1a19c17d3bc. 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/QZHZ52227019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab01495f1787e5ba60bb777d822c9ca8ac449ea7cdf6f3be0645e216d1d3a3c8. 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/CLA1D2200034.