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 0x595277566c82e80b272e5e4f263a3abcc626429431dff4bb7144549c504b128f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d470b034-487a-459d-87fc-3924dc15d7f1.json and https://artists.proofprofile.net/proofs/artist/d470b034-487a-459d-87fc-3924dc15d7f1.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 0x127c583c7baee9fd05aa899108d8233e2e7513b90893614b0c8f5227b9d242dd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX8LD2587333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cfc67f55012821c978ff92f7f81101355bd53efc27877d560bc83c8ede50cc. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8LD2534629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8133f7b8ba50c51021b3e302688b9c5d09c15483ce11453e21cc77f91f035a9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX8LD2519784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ddd1d79f65beab9ca786a3a35c29d5723be073f7e3857458b67269a2c7842. 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/GX8LD2553537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ae0e7a61679a2c114edc27c9dc07d91d724f04193276ab0617a5ec9c0d99a0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:26Z), 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/GX8LD2598126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f9c4a67e9a0ac67f17dcf5182f66efda932967baf9e57a11d656f7962d811. 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/GX8LD2506133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee10f5da9da361d3ed6754801a77c38282be372cdbfb63c049607965494542c7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GX8LD2559461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0d5c1898c053a1de634fff15465f303ad2c0b543730790f8b6db6817d64d6a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:44:57Z), 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/GX8LD2535264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553f48fcd3aadfa6bb1c78412dd240ad3de34a780d1c6fee426715b2770bc44c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX8LD2553655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0715bd5300cf1a45f1f195a9439a46bde5cc296f5ea76e18914bd4caaf54d12e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8LD2566842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46824a43fb238133c25f21caa21d1b6c9289095404741d5b98db460c4ac3328. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:47Z), 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/GX8LD2517339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9021be743081c86934fcea22f0924c89bd38f2d70a1ef03b78878a0cdde35. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8LD2574096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c03180c2379be554e0d697a6984a7f9487a3398324b77bf55b18080dd8c9224. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8LD2528669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e470a91b9739e53bee4925f1292af98f3fe520ee517d74597a14d67b974ddcd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:24Z), 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/GX8LD2546642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1bf26d2a2446d20de83b0b071a31ed833b11645e32ea3bd293d9c56db553d4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GX8LD2586601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f54ba2188ad9bf0a7378c7d70654baa649c36baa5bf94156520ecf0c903753. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GX8LD2507418.