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 0xfc337bbc62599c81d286eb186dbf3e44cd39286364396b6d1d518ec0ee2fd6a6. 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/e32b18f2-31fe-48d8-9984-e09ad9062d5c.json and https://artists.proofprofile.net/proofs/artist/e32b18f2-31fe-48d8-9984-e09ad9062d5c.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 0x180b135d57ac50e80ad040c3d2ea952b2f14f8c8cffdc2b8ad21a5378d6513a1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2127108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f93ccae229a4f6fa9e4a0d0702b037382d60f2c52813aab050cee5721c0784a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:49:38Z), 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/US7VG2251289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d97efd3aadbb79baa07e18cbfd63522d0ccedfe4680977d4b05ce069c18d1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZW9L2200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67074883eac9e64d9be4d68c2fb9b8600ec6a680ae4382a48f8745ff3868d307. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZW9N2235183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10326d6652dcfee92d68bfcef5589034f89f78eb3c11bf7537897cf41844ae0. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/US7VG2394615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d93826e70dd3bfbaa4c899ea31b34f5330eb4a884eacde839dfb119277189c. 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/QZGLM2356603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a0bd4d319436a94854e8743710ff4a680efd9fd5a0fbd278c5f51c23665943. 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/QZNJV2380769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203ebb22cbae00e076421c772611863979876db4005f7b050cc06e01ffa16613. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTVM2304555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f9e29433353760d16d070a4807f4fc94c5cc5bd301ccb5ad5cc5e5d6198473. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZW9K2339858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc667322ffe7bcbdfaf85bc5d4bb841d0a0ff6fe497fae0fc9145c1d685a79530. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:32:43Z), 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/QZW9M2344695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c926b3b7541af32f4f63fd71c4213633e152480135d63113dc4b7814d9d723. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ2437398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0356691a418d1328171d2905455874068f17cc2c665ea264e39deded9b75803f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92440765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f9e29433353760d16d070a4807f4fc94c5cc5bd301ccb5ad5cc5e5d6198473. 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/QZW9K2339858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a0bd4d319436a94854e8743710ff4a680efd9fd5a0fbd278c5f51c23665943. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJV2380769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180b135d57ac50e80ad040c3d2ea952b2f14f8c8cffdc2b8ad21a5378d6513a1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNJY2127108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb62663795725dd62cdd1081a33019c41962dccd29f357b29f10037e847da503. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QM6P42567716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9189383f7f7ef7300dfd7c2b9128500fb04e48e7eeab24c1707feaef01f647e9. 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/QMBZ92533088.