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 0x8499b3a066b8c096de4730c6d6d01802f5b22c70c02669c663e29bee4fcb244e. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bdfe49c-e6b9-49ea-955a-d26769b8d344.json and https://artists.proofprofile.net/proofs/artist/3bdfe49c-e6b9-49ea-955a-d26769b8d344.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 0x43d908fffd6ef8c0446310d9600521ef04cd7737b5bb0ef9de5ade4136ce574c. 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/GBBKT9400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f01bb6ce0762a10a1bdf9020d990acbc30a016857372afacddac495b1f6da. 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/GBBKT9400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3833aac9129a026266e64cefacec4c113b10922bcac15a372ced6d4395e68f0b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBKT9400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b11ee8dc0154ab03c31f5dc003f7ee29f51a55cd79179585157d9920e3da85. 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/GBBKT9400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef48d69f7533648c0479bb512af0448a74e9f8bfb6bca2ee7738564625c66c96. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBBKT9400007.
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 0x9533bf7c2659f83102204aafc87b9f4e47e70ed53a1624c5fcc1c6fbad532f6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBKT9300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c45ede2b138131a0b8ca69c1b25c4551ea4672b4c43af5eb4de0951bb9fde04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBBKT9300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc0768f911556839b896f97f92b6348064801ae1b55a5ca743386f951ae9118. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBKT9300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7543c8f14a510d69775dc5645bab41cc590dbca176679dac4eaa70c30bcf8d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:32:39Z), 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/GBBKT9300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e33c6c4a250e20bc3696f0cd4a8e70825f73eab665ec1b47d7042c5f3f3ab0a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBKT9300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d8f433eac5ff6cb6a92b9be931202d005d33a825c0d0f3c7d88fb12495bb27. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBBKT9300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac746d8fcefbb9dcccbd28e697ec04b7506d7545e72896a546553f089bccdd4c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBBKT9300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9fbe103399aa7415ddbf4008b04406c53ab75bf214b882e37601858a7d2bd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBBKT9300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c49ff2b767e63c94e15c6e65402916a886fa621ef8404c02f8516dc076f6bb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBBKT9300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224e0dae4d37eef1ea63080775c0c9360bdbb8df3fc6af0d4e7f1d1669990a05. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBBKT9300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0a59a3ea5f5ebc28435a5799128f27bf2253e5a1029b8ae62f341704011a1b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBBKT9300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d04061b6dd3d26883ba9b6dd030435c018a82686aed3632781ee489f4e46a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGD2202409.