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 0x6823cbf19f04ab4d5cd3845abbc247b0661d32974f37720871e23b2e0c9cc338. 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/99acdf56-115d-46ee-8140-a6664fdcc786.json and https://artists.proofprofile.net/proofs/artist/99acdf56-115d-46ee-8140-a6664fdcc786.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 0x34c6b0acd529f3203aab579a02eee3bd3a4d868c29acdb60bf001d806be39307. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPW462441839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594e0bbfed4fd4e5c3fe4644765608006410829db8a89e04259a4b359c736812. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPW462441840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4e319311f111df20f408553038bacdc535102715bef606171d98e350d59e26. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPW462441841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ba5c2729a9c8e60810c3352bb403c9ce39f67ae7e47d72b327d5113e70b7d8. 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/JPW462441842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c24d662b11c2aba12b1b1343ac59a3936d34801091206a10877cc3d67f99b. 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/JPW462441843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de86fd8c9b97a9837a5d5a17f68a5556cb29cec101875468d2208d8dd7eb219. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPW462441844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cb14882c7d650316943c6d6d3d3ae854f64a94bdef68864bd2eae5e7ed73d9. 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/JPW462441845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff4f916889c4bf891339087b0fb1c62adf7b5f1edf01fc0b223387afe16b218. 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/JPW462441846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd5d249ac16021326279de8368703f1ddec468c9d049ce80dcf7b2694780812. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPW462441847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565878eb2b916d16b35c1531447cf7b68c047cf9fe4b7d22a851e03ff7891022. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/JPW462441848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e8067b91253fb67cdcab3a9958dc18d143de99bcbb62d6fcb9433ef475b3b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JP92Y2508042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eba4f2219f1e93f2c53429b3eb6ccb41c68eb5c220b6a817a3b657b1bc495f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92Y2508043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d34ff3fbf7d552fc9cdd3d14201b31a8aa712431948ec347892b309a9076f4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/JP92Y2508044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d93b0fa2a7bff2c0a91abf09f50d5f52dd62d9d17b4c572be52df14951a6342. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/JP92Y2508045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2605b9efc1e2b1ab79a00e0881108819833accf9d04fcfbb1c191341e142250d. 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/JP92Y2508046.