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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3fa6d8d4ae9bd2214f4635b5779ba7834a33f76cfb02b5edee300386abe908. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bda8d394eafd2a38c0cadcc1957c3802f4cb1c84d08b34e32c0d19e0b2f2bb. 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/QZDQH2303098.
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 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/QZDQH2303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31631da15e20c66b9d08c94ea08211aeac71d7a624fdde6057e2eff4eb4a4c70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/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 0x3efe74ee25e9232cd899472623ede66c59517cafebdc3777ddacf928cc3b5833. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/MXF160400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d83ef8a0a689129637a775835cf3950249aff4b362ac86a485e4826a5027833. 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/MXF160800675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0f47aa7608e0ee129485bffd99c38a1006deebd38fb9749ba2be18f830f4d. 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/MXF160102102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d2f3749edd5d9421ba351fa2da8735e1fd0cbf9dda04f45fd3f8c25f12e479. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/MXF161300688.
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 958689 (2026-07-19T07:11:11Z), 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/MXF161300691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eea2e76e27601664a313909b06526942b3876e81f92e0060d8a5eef984f88d4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/MXF161300693.
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 0x13a032cae4578f411a6b63b60b26cf7af2f95bd8a7ba565bb552c27a1b88a850. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCACK1525159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26a623a8bdd5fabb2bfd07485f101aa4a9b790cd5a53e81083d62a797b0bf48. 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/TCACK1525161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26754fbe73ce1bd95de7cc49b82bbaf2aa6dbfc9129cb1caffb4087b3d649e57. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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 (2026-07-20T09:45:25Z), 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 (2026-07-17T06:09:33Z), 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/QM6DC1666771.