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 0x4c6b4fd0e82bc95a941d74c57e6d0aed9467b6303107c91c0f3ae7f30ed2a308. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e904dd59-37a3-432c-8fb4-a6a0cd54c55b.json and https://artists.proofprofile.net/proofs/artist/e904dd59-37a3-432c-8fb4-a6a0cd54c55b.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 0x2249a85388483d490b1b928c223b2e3d1918146fff86fd57d898774627b548b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ZB9B72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cd7d6117d5f3c16cf9733b497376affcdc37d9b814cec4181b4cc229a836b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3FC2550202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42796bd88ea18f5d9c8d2a5747b91efd03c40a533f2b9d4ff63754bb56f509a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QT3FC2550203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76d2ecac3bef3fe68fe2fc8d610cdfd45415d6eff0de72dffe2fe8bbfa9548f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3FC2550204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d39fd69e7d47721db45eea26da20478f24d7969793638709a0728d8190deb4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:07:48Z), 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/QT3FC2550205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50a5d1b5e75e82c205588db32049da3ee7157c1ba9be5dd251741687e1c8f1f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:37Z), 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/QT3FC2550206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cafabe0638c3c1696808089d240c484a164b1c2b43deb4cc4c314dd7c7422b. 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/QT3FC2550207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5443ed838c362c9b9c42389ba9541e0388386aa5b033a4570d85d338a81420e8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:16Z), 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/QT3FC2550208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256916063b661d5fa9509b793bc9cdbe2edcddf508bc86730c9d8ef5ef8c14f8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:48Z), 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/QZZ782587393.