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 0xcf83ed5508f2f12502e47257f5e8f6a3ee4b6f9ff9f13097d3a4036d5bc27f29. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ce1ca33-e5cd-4a5a-8491-908d8c71ef82.json and https://artists.proofprofile.net/proofs/artist/9ce1ca33-e5cd-4a5a-8491-908d8c71ef82.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 0xf4ccfcf881c90375f815d0daba547c89efa665fcd6d69683c1e4b7a7884f4ebf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGJ1861119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922f8295f6a1c19c42e4280ad689368749f670c5dd9924472634d41d0b160217. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USCGJ1861120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5a68211829a9cbba7de3c5f64394a08c4e5ed8f55443e3e7a4192b395f9cd. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USCGJ1861121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022f413c826e681bfafeada0e222f2e88e8ea070ea98107eb215f05fb6a13c0e. 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/USCGJ1861122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e2dbd91fd68a4672b0f81b57eb112529a21c1814c789a75b3ed0bb93e348ca. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGJ1861123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a86b922a55732e5d3eb0b435dd8275d54fa6d6109a7066eaab17c75248cf3e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGJ1861124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2712a0c1502e04b534f1ebadd6d0b69838d5d1809431f8671958664733e912a. 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/USCGJ1861126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead73fda6c36bd67b0d6cfa23f1ccd7df2bb40e0392bcdc7cb09eda5b02878f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USCGJ1861127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0af2795072863fb1ad3951312d96cc1c8321e065632a656b04a1b95a5e498b9. 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/USCGJ1861128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8ff7970277ade6df7cede7aa0c1c76582df95aa5267b1711aa9fdafeee46c6. 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/USCGJ1861129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f259d534cc0585ed95e730bb998903d094068a697bc9daaa5ebd1cd6561f2d4. 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/USCGJ1861130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc486995b3d67abb82ff73bd6475ac38144e9f4c8ae2b5fc4f11b95360d5e74e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USCGJ2339802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001c70f6e4dbbbb09f87ad28b339d8f78a8ed58697ecfe0be5b33d53bec9b21e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USCGJ2339803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cc2b91bd2118e263ddce45ab9b739c57854ab0cc8b10d6e2c846c3a5386949. 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/USCGJ2339804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa20dd701bf754209c867006982b324dd23c176040cb62258e398f63022a1dc. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USCGJ2339805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392138d666586c71fc8dd4b08a0b9894a7a2521e96aef3526d153742a7cfafe2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USCGJ2339806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d583b39357912708877e566aba8f36ccdcb46a22cecb46273f1ed54ba9233f. 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/USCGJ2339807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a99f48cd7c19f62f8d7bd8bcfa36ea91ef8fc9b6f82b8d20ebebf84522db56d. 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/USCGJ2339808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74bc7187136899c3245183577ae603d9078c3eecf7849f89ff854dea7e13144. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USCGJ2339809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbf76c369312e3369b0f4f7b594716936f2ca94a30f433624c05d85f2fd2240. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGJ2339810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf44135f568cfd0f666e16920a4ce78558b90d3e9d01ab8ace65cf891698d964. 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/USCGJ2339811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab949ce70b81573ec1029ad1fbdfeecb72881be94887a3f2d494478bda6346e7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USCGJ2339812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8400c83e9bbc9ae90e043b013bd842f599867592f4902a4600d46b940ff52b. 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/USCGJ2339813.