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 0xff2692112a0e3b0e86126aef8be93fec9ac0eaf8a7dfb64a802a8a0cacb0deba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d72df2e-4a0b-4385-8ee3-77b61dacc104.json and https://artists.proofprofile.net/proofs/artist/9d72df2e-4a0b-4385-8ee3-77b61dacc104.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 0x35c760e65038812916163743d69be8f03ff6e3a1af52b1dec978411bf8a8acd6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TR2320600255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34ab6423dc19b152aba81ca4b0e5d1e4bfb2ad3d448822ef20aeaa5e486dce. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR7204000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bba25e85e95f1ec9292bb6c6372d6b018911236c5d0596728d3d16b47d608b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TR7204000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f4f99b6799889d6511c46e1c15bbadcf5ac61ec48d6cd8b84dcaefeabf3fe2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR0720500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1304ec197c307c4c336471a33d6c8b22bea295020038a8124ea439cab86d4100. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR0720500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c5200c9047290d0e2033bb023e46ccdee6b6540543835bfdb765525bf5d014. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TR0720500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b9f7f8c67b127dcf2c32ce353835fded45b7a25a0cf432fbfc6eb697561506. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TR0720500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaad60908c174e660c60342627af5b23b752fc8adc24cb9e1a8dbca3d2c0bdd3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TR0720500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a5c9324c249264be87f3ea09aa92f623b40a1b15efb93a3353560d9237d86b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR7206000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4a186ef9c8c1016f6dcad31c07916a78ed47c885d0a41591f7c59e95bb8ec8. 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/TR7206000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec8ecf895ca3807769974bac3b10a0cb63961db0fddf1ce7d06e4dcd32843b. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:16Z), 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/TR2421400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf490346586ad33f707b7fc1fcc39818695484b923c6b91afbf236eea1358d2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR2421400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217764bb2325ab2c9bbca3c60fb526ea30766c0b738de4cfab9245441e546ca9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:03:11Z), 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/TR2421400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8bf8f0b0a5484e352c56fba69e74d95c7f02f5dd73a19bfdffce00efaba67. 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/TR7204000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca48a03a6553a9badf28b6ef2978351ed1d3d544f9de4ddf740f59af25a6514. 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/TRAVG1500005.