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 0xf9df4e37408552dfdba1629190eb24efa19a185629523c86202bc912ace86b37. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a62be31-a171-47c0-af34-1bf23662becf.json and https://artists.proofprofile.net/proofs/artist/9a62be31-a171-47c0-af34-1bf23662becf.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 0xfad1d7f85677ecd417736b934a5b5333352f0599403e390117a83279453888ce. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZNW72403967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c086675f8d0f6a213c3d71df7e2ada636270af8083b391d048b205d7a778974. 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/QZNW72403968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff319ef134375d55b7a9544abe509a2cf938e618886db7d0344c723e07a3cc26. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:15Z), 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/QZNW72405724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809628e2595c77a85042f8e59cf0e23c71245cf9f0d83e66640ab9e7660fe75e. 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/QZNW72405725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9f5ce55338d240e4c0aeb78d86173d7aba4e338acb1a6b8dc4e3c602f5ef54. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNW72405726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fb49f057fe1fec8a51b31051fc1e2434608a7cb8bcac167e68b3db0cfc409d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:03:00Z), 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/QZNW72405727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4285d97c6ec162ace4fdbc2ab8eb74ba996fe4d75f78e31e057a27c280108d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNW72405730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78aa28d32ac14981f5d1dbc0679f4a52512a54351ac011d7163f9d0dad07a44. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:23:06Z), 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/QZNW72405731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed6af4082ae174e791b4d3ee68b7809a0e7a3c91b100689844204576482f63e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:40Z), 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/QZNW72405733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067f0150745435ffa0740e0535ffda00d86c766380019b7b85cc7d6f1bf89694. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNW72405734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f6c0af1916a812d60bec6e93b36d0b12ef897876f4ecabf518f113a345d58b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNW72406946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e16acf6a973af57c413251d6900854f5faded82559d7326323731ccd3ec226. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNW72406947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803760353597b2861c2f15d2988c6849e4e332ee62e79c1620dde1e54e2294d5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:27Z), 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/QZNW72406948.