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 0xbb35ccaf814a2da32322e5990ed63b60f55da9069e47d8dc4650fbda1dd48843. 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/a6d8e446-1612-4c5f-b02a-8fb3fc056191.json and https://artists.proofprofile.net/proofs/artist/a6d8e446-1612-4c5f-b02a-8fb3fc056191.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 0xbc93f7e994341c3496f1a4cebc561843df24cc559cdb0b081d659b8fb19e8eff. 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/QZNWR2253528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf929d42264f6d36946ffb790d7d698aed27b8ee98dfb95b3c32f0193751e4d41. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWR2253530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9f9ec2cd5f147a2bccefa1d22de3df5041807cbdf93ae09752b81cdd56444b. 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/QZNWR2253534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f7ecd714545eb200b9ce881fc23f7452f0b1691591b8c7d87ec4c91053af1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWR2253535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794f93d0f77230a953473380649bb5b68c171864391b622c8b7612def191f881. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5363c315063e1cfc21d83c73f21eb715a0a60351d6cfed2cbe2fde8e056f0fb7. 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/GB8KE2211514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f2f3cffe1efe551a2cf14477ec718bbc65206b0c0c9137f93a929257831e40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92273287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa63a06a44f31c91eb0765eb5dce57a62d01e8f5ff8f4dc5deac9df9d563dbe. 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/QMBZ92261972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0acc4512948c795c92f7d79c00bf78be5756603c2afca64f2b580d04f147b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92261973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34322c31bb1bf67cf4f3a3523c41fc98443e34e0b5413dcbc8542b13ff1ad97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22274481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1bbf33baae5ae18d8ebb0c518254bdc65b319d3eae78adda24c1b09cf5cf0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS632289376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179248f424bd335705be9a5a44da7c03fb5d810687bf428a009994b94063321e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZKDK2212282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2813b1e82174811cb0c9b32081a4805219a27054dffda517164c6a1fa594bbdf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMER2276699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690bc71641a35c9a250daba4153a41ab98f102abb550e255b5df09957ca8cd45. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZKDK2227685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b139760b3b36de990024e903853d1f1f1ab211d32bd4c37a2ec076729ce2818. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFU2185442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977bc582cc0a9e04ea767e73633ff06d236ec5e3c29690523131a65ebb7f9e2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAFP2146677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00741768cd21e3743854ce322851ff95c855fffe45e4e1410ac2c777824396b0. 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/TCAFI2197546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74746ee7f3404fa5dc2cee29699a1de89ac75fec28785cf6d8066c13664ee4d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUBEC2045019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b31eedce83b3bc2367dd467a67780b19c7ecbe47eed5ae6316bfe51daa4b2a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWR2211082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4bb6d31ae3c3b9c1f09a79385ed4ae765a2d5b4a95c10586776a9d55b85ba3. 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/QZNWR2211084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bdbfa3f5e8b56337164a3006b19fcc315bd4bf81b218e225bd8c8656b27213. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWR2211085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51ef37254ab720d4d782602e6d448545d9e02377fb4253f1d733620a4d5cf51. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZNWR2211083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e39e04ad891361f0acd90fdd50f1c472dc566b8d06ae709331caf1096244ea. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZNWR2211086.