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 0xa76a069393577b705659c6c7bfd80417047ad7feb2f41d67b84abfcb66eecefe. 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/eb288d14-b448-492d-97d1-94a0cb88ff28.json and https://artists.proofprofile.net/proofs/artist/eb288d14-b448-492d-97d1-94a0cb88ff28.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 0x4c52fc03035913133f11896581487382cbc2acc81c07d77c95c1cb9b4a0a63d6. 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/FR59R2165088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2091da78da4ab2ca0a5de44d0fb6d95a992c1cb876fc5dd5bdf636bbe8582aad. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R2165090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d572900e3165a1288255e9f975214fd46e729d5ab202cbeccdc4f01a06fd96. 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/GX3Q92329360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a00f366d57c54f7cad34f3a36e2c253213bd5a95fce8bf38b00759ee61eba7. 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/FR2X42176813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064236685c0141b07e3537de454155a5f0d445b71380fe8aaef70ca98462a291. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR2X42176660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9abd694e76edf1141a9b475afdd6e39e556d7cc80413153e2c1c3cfebca163. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42176661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876ed823569e79670d51ccbe9c4f321b4f0ff3265a147dd7f2ce6023c8d90ae8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR2X42176662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec9a5ea2848352d2c3c728297796588d515266a117d794444a19fb696777eac. 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/FR2X42176663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1abced3eae64b16baf5d517c564350886789c7a8e480f4c6b6c32c01a10e4e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X42176664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c3b66ee12824f8037e36f7f8389b0f9150f5f40a307d470e7a515b5bda4297. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR2X42176665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd51cfecd272d66725c29f7fc98f9c6272dab8492513575e180c88c4adbd8cd4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FR2X42176666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf9cc2d2e73ef1c73f52797a76d7b6e4b4efebb5c566a0bfe9aa680935e580. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR2X42176860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c77483874a3deb292113ec8fa1a7d442cfc1886b790c2dd075364721bed582. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR2X42176861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c43347b8a36c882b781241c7c79516793b09798d005908d95696e3250e3e9aa. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FR2X42176863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26894bb089806a4e1188c9bdc619a72665a7f3e4288347e198b1cc6082164be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR2X42176864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faab955edeb98543aa508021e46db665300aabf36fd5944bbf63819f6cb7b5a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR2X42176865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c3e62af14bdc0cd458c5dcaf3986f6e774fd3a4abdc153c16979cabc3e3ce. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/FR2X42176667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf7ff7f9bcd3da6fccc27df07c7cf6b2f747c677e9ad4e7c7570760b41ccac0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR2X42176670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260efa36cd626bb3b601fc002991806cb3d4710ab0d75008ded3c8a1b7c61589. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR2X42176673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a40901ae769142373afbee1d0f29f31008c034c795b6b4e883234889c3f7c23. 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/FR2X42176687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff13b11d520b5ac78f56d3d43915bee5ff56642dc8681a21d1f53228a858a0d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42176610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b04fdd1e551c2a4a4b3f3af22a9fc34d6e9de07f7ed2a5c0c6104bab7b3604e. 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/FR2X42176611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b08d723f3cc495c163f68178e49d152b89fc79a8cfe299b039224abbdd9eb. 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/GBMA22315746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98328ea17d653df071299b1c4d4bec4b70710680df7ffe353a4917036bd5ddc. 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/GBMA22315747.