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 0x39b65e0dd6888955984d5a2dbebae0cd62c2a6cd0c98738a15c47674ecfc50a3. 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/11387fa0-704b-4af1-b7c8-870245114c51.json and https://artists.proofprofile.net/proofs/artist/11387fa0-704b-4af1-b7c8-870245114c51.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 0xf96d71913ed89aea5b35e3009ddab521b57c4386d6333c10dd9b7988f37b7bc6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUB422201467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3a7792740a770c7f3b5f68a3bb0b9d31541fe04e9a8d34b71db47c3db8578. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/RUA1D2273582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15144ce9b6046a5020bc600537060015de54e5a783b5ac3ee4165323b966a59. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/RUB422300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f6a1f4ac3b540fe2de6a781d7cc3cd91fa4e9de1d81d94e73631ae66758869. 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/RUB422300757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb541762bf1c269439366dcc5227fb982988f08c4bf86c6a2f46c80daf63ad2a7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RUA1D2369053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c69b422b2c15ecfdd98869f1c80f589bcd2daefad8d9859ca29db88efc3b6e. 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/RUAGV2304382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4afef51aa2bbe0e8cf4e6c71adbb6b1d29030da145c40a4c4ff2bb9cb25a5d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUAGV2305710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e9f76a2035da8fb44bf195383c6a9dc835470e73de90760564a53caf1fec3e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/RUA1D2420566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda00525720faaa33e203556beeea88d06a9baee7a11d674be4ed3741f27624f7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RUA1D2443104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b7d27ed44553abd6cd1f32fdb324783ac1ef904d0b0128c647d446888d15b4. 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/RUAGV2404883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d10db15ae69e8519a4dc6436db41a4b9e4db76788f95735e5ee50f826db761. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/RUAGV2404884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf7d48b93416dc2210d7ae4bb1ba2981ca8c99027590ec109a9f28857211c21. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/RUAGV2404541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c565b787a06343393d59007a5f94d6fba3bc6f9969f99b2c7c590e92f3e61d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUAGV2306680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f43cffe1e0ed1674098134e27c0dceb353e2cdcb1a68ab87a536d09e744f6d. 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/RUAGV2406342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dd69c318476ca6e7437d26ad5988174bb99a95acbd6d72d63c5e55c2417244. 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/RUAGV2407155.