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 0xbc3fa6d8d4ae9bd2214f4635b5779ba7834a33f76cfb02b5edee300386abe908. 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/181624e6-9c7d-4480-b405-ef65d58bf449.json and https://artists.proofprofile.net/proofs/artist/181624e6-9c7d-4480-b405-ef65d58bf449.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 0xca664797a49837c0323f41c5fe7c8fecea7472863fc02ae2950236a2b9811b51. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDQH2303099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9818e44406460419e4f7befe646f5f87f0ccf493387174f09a715f5b482e2e29. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDQH2303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31631da15e20c66b9d08c94ea08211aeac71d7a624fdde6057e2eff4eb4a4c70. 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/QZDQH2303101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44e8f611711bb3150056def49ef19d4b04b046b7f46f92f307493b9a83bd93a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDQH2303104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa611da48f65c8346f16fed580ad2456e1ab55ef56409e55e450dd1ef4844f00f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDQH2303107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d83ef8a0a689129637a775835cf3950249aff4b362ac86a485e4826a5027833. 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/MXF160800675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0f47aa7608e0ee129485bffd99c38a1006deebd38fb9749ba2be18f830f4d. 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/MXF160102102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e999251335d84435c56d537faa6ccbfb266ab9cce2b8510362dad5e56202d26. 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/MXF160201198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39804aeacd977d517f53f69e9994e0b11b41544121aa5f49888a2f52d6d38472. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF160201203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3adacd3fe3799ac1222b95009c7b434fdf0d4102d581158a2c5cdafe3649cf. 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/MXF161300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801457d04473bedd67f759c847d11d286de47f376fb4d4de8e7da58387b361b8. 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/MXF161300691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3884453a66a7fa09480093637887c5704ee19831eaba87cb35de2a314c370db. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/MXF160400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d38d3d3fe87fd483633424e2fb5f4b0e712f25f45c22567d21a5568d2d307. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/TCACK1525156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11920036136a18ce8fe70589c6e8884a10006d9d6fab6ddac01707d5e99f9bf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCACK1525157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26a623a8bdd5fabb2bfd07485f101aa4a9b790cd5a53e81083d62a797b0bf48. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCACK1525161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26754fbe73ce1bd95de7cc49b82bbaf2aa6dbfc9129cb1caffb4087b3d649e57. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:09Z), 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/TCACK1525177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cad052cb79413ed8498cc14ba9afa6c5c36e65b424d6ae74b3d1c1ee28c960. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:37Z), 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/QM6DC1666771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cad052cb79413ed8498cc14ba9afa6c5c36e65b424d6ae74b3d1c1ee28c960. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:16Z), 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/QM6DC1666771.