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 0x3671de7e22e3920b26ddf50279445b2bc37cb73a9231b7498bf81ce5df886f82. 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/05695f7c-fd5a-45e4-9d58-8290fd70de9b.json and https://artists.proofprofile.net/proofs/artist/05695f7c-fd5a-45e4-9d58-8290fd70de9b.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 0xe7efe65070e4cd13514bac52eeacb17817211be9341ffc3616d2e0de1f4f45f9. 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/CA5KR2209290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa084759bb4e690f8962d2e605670d6ba788e1e436e69857295c52a5ad80445. 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/QZS652121801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ef9ac3aadb53d558e24d232c0a427105af4823c59e30f7a3e1d9296e55df4. 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/GX3HH2489205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ca24ebd977142852780c67e88eb6339b9b968ef2c2fa648cd6c2f95bf48f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82416437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3634e3ba2e7335a84cbef9717a6b54a0426f42b0a2fdf3330a2b2a5ce0a5c6d0. 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/GX38U2486159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8fb6a52bd9162844618bdae42ad68ec8b00e2b6acb399dee32d58ffbe98f75. 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/DEPI82415494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f435df491b35c9441a2083f3cf8c874e03151a5493cec34ee7303d1d6515a10. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LE2421369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd294f13e5a0562aa495419f50416578bcc1e93aab4db688f0f4099ce89e2131f. 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/NL1DT2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543b0fdd303d02d9b26e53e38655ab0b6ae8af06dce31259af968412ba02cdfe. 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/GX8LE2481756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5dbcbc99749c3db1851a61f8ed6c5a837a902b147029d9599fa0b6ccb0226. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GX8KD2458032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe509500c37baad8f6162123673825d5d49730303ba244fd2a173ac8fa36c06ef. 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/NL1DT2300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa0380ab796782a052f9cec03012354be4254f25b2b404e48572bd17d852e5. 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/GX38U2320311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5842ff701f6ce6d1e0cfeb3dd6b6714bb0e286282dd2710ad4c525dd74e7a341. 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/GX8LE2315938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8efe23023d5890ba34d998bc598ea750aa1e049bd7ffd1a0e3b25087624a93. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZK6G2327960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9484c4b6c77eddcbdfaf47946b2760210c5584c5f73fdd102f7099662275d7a. 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/DEPI82300825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917ef683ecaa2d34284c138e0c0a3d8b511ea60eb1d680be1e7a59c311f29e63. 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/NL1DT2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c626232faf7d7d2b61cff1943066dc765d8dea5569ad311f00b79855489f03. 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/DKD3Z2107599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61854a666f7a220e2cf34d73a46d0436d9640418c72c0f6594f124c53876c0af. 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/USLZJ2257379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0b7ee97e5a8b98176494d82dcf08f14c302fe9ee011c23c4f6b37224f3162. 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/CH7812218084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e98cc2ba9790c0e365416ad3af0e6964c43fd3a53da06dcd3c85ea1106489. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZS672134241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d654443449373bca8698b6391f64f2a515667c2cc01b95e1cc3a1f31254ffd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR0013417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bfcd5b8b54e1e76bda508e63b2a4b9afb1119d986a3a52a6728c18702ef4d1. 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/ATR981229228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2140c0e62d1982c6e177bd68eb5241132831e5d8e20b78f41592679fa773aa. 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/GX5MY2580343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf48272d6078c176c4a149631eb204b0f00af6dbe0795f850577e31d4bb10143. 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/GX3HH2588870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a70552d868f88fc8d92f66308dd6dbff722c000bd9f517d31cb7d17505c5a. 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/DEPI82511612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ec4fdbeb18af3b158faeb9632fb6fca92379d8121aef1dff5d1549d07096fc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82504339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a0c7f4577ae7e02882d88d785a9c9d746a9a444c07debe6d13019be4808541. 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/QM4TW2581963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc01568116569559dd8023469f4ca874f0593f341204f965684693b3bd26f5. 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/DEPI82455550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679311e65834461683ecdcb1f41525bc558d28a160d165729712aecf8c3ee0d0. 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/DEPI82450073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fe4d5de25124e5fb2ea82a03c5b7e36dcc027ac30bc601b2f5a7e1458c07af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXESV2419572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150e11fd677aace501456f5bb5294f799911d4f027a8e2598bac58acc83a327d. 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/GX4R52446775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917ef683ecaa2d34284c138e0c0a3d8b511ea60eb1d680be1e7a59c311f29e63. 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/NL1DT2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8fb6a52bd9162844618bdae42ad68ec8b00e2b6acb399dee32d58ffbe98f75. 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/DEPI82415494.