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 0x0a78507c960de85b9d75a11222611f3adb227b25c1652bd7992a1a55dafdb42e. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f95ddfc7-2dd9-493a-afa6-9702cc026ad5.json and https://artists.proofprofile.net/proofs/artist/f95ddfc7-2dd9-493a-afa6-9702cc026ad5.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 0xa7b33cf881fd13d14d296a515ba24a69f41ab1b201f6f420ce1592c71117829b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR6V80002071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf49007299ffceec597e712b97a614e07db0a60870745b42c0388f048ab7dbe0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR6V80002072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1816184f74b233bed60aa9fc2af0ab0b6e7870567d04dca1cbe7479b1c3e9d5. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FR6V80002074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef24495ac18904fc98fb06c9a0b7d6e0d1f454d4f4ae110e359042557c411591. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR6V80002075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c12328009e752f5a2326f0bcc18ddcf8507712ad5d0350bc73ea68c3983e868. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR6V80002078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a101cf2bed11a384b23968826785f23b6d66991eb42b4c8b5b74eb76637e4da. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR6V80002079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2353d5fc5cd1739996b67e549566112e8cf22a2abc18c8672a83469a30c3ab07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fae78c9eabbdf2e19aa441c8dc72f4925d100566c2059f71fd546577be0637. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80002084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1833869bd211ccf55187d7f7cb2f1dc091331582f7f1b3a8f92147c4f26316. 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/FR6V80317070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8785d5bea212540714ae7dd7a30d467981585902ae4d30c3a7c564a454154. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR6V80317071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7ea62ef0613833b68dd5dd033083b0b1049bbbc21086cac7f11b319c004b27. 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/FR6V80317068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23c8f06d32cf5290be0940c0497bf1a42416832839b0c0c2c61e72627fec88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V80317092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd2dda81abc59883ab070d738a6ebe68e2f721965a09777b7e6472fc0552f25. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FR6V80317093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab28893e9ab42d075db5ac3b5c11f9222102192eef3de1068be14839c7ed79f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR6V80317094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eee042b9fdf588a79ee733614c0813ad486a323ffa60ed0ec833e9b8c2b5c6. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/FR6V80317096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc923a184a48036235d2a01368a1c37dc52ccdf71a95f514303adc755e111f049. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR6V80317097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4310c6aeb6381d2b90188ac87fa0ab135c78e48b12cf7dc9b6279fd7d71cf3. 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/FR6V80317098.
21 Nature Backgrounds That Inspire The Mind