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 0xfd1358570546ad247fc976538b677d2fd413fcc33849e43b039ae8050ffe0efe. 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/fc872713-130f-4810-a171-15f72ca6d827.json and https://artists.proofprofile.net/proofs/artist/fc872713-130f-4810-a171-15f72ca6d827.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 0x21f786e02d009f1107032007cd3459b5cf294505d8eecff47ed849af717ecb4a. 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/AEA0Q2133162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e83e674febb5c2adbdaffeac85a33d579d3b51abc64a052a97efc8663190a. 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/AEA0D2131151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4437a913810f540014c3b3139af4a7cfb43545f7e28b914535d86c144294d2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/RUA1H2244364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859e014dfb97496b973bb98cf14116645ec023474c1a2b7483c9f68173dc0cf8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUA1H2244367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ce9138b4321f09468aceb18329f60246a8cdf5739fc272d63adcd57fb5af6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1H2244369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6151d7430eb23f336a70544e3edd5bdd7afe8249eabd442d646ca04ec475ca31. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/RUA1H2244371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83253e7e4df8361a76f56810300875b59a85b29dbfde48beff2a5b8f4a03c3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/AEA2M2150021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d670f46564a5eebe4136b4fded0312abc00dcb71ea0f2997a95df74338b831b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/AEA2M2150023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfd31dd7c5c3c1f7341c54f372d5a4e9ebc9bfc24c810fe7d91c5c4db109438. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AEA2M2150025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd2107497a9af84819eb17952139dff894ede35285e3b8744fd2e25176ffdf8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AEA2M2150029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9b347dc154637443f9fbd647326e0f9470c47463b6530a1bb2abfa962c52a6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AEA2M2150031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29296663a43ea56cb00e3534454ca833c041023ee8f8964013f459b3f56245d4. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AEA2M2150032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1f902e08827766a89efa8dab1ef2116d9db068d223ade5fc8735df7702d754. 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/RUA1H2359710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f9dcc1cceed5ab0c6101fe909f50f36985d86c9f10c90b4bb7509cdcd4d4e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AEA2M2359888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce8638464bee781052eb5c7f53f809b1ca32bd897bc90e7ff4507cbe3c0d226. 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/AEA2M2389583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b331092e51fe3e364b1c3e786eb5212ffdf027ae3920f9c4cef9eb8af2a06c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/AEA0Q2385123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971beb626e81a5630c3bc00b5b15be61cbe26e77247316bdc9aff49635457ff. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/RUAH62430132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ae8ed5ed6368d62cece60406f92bbf55d03217e278b26f94e728e833626322. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/RUAH62430133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa047281ec85479723a0e9a3b193291dd48b4de2868e3681b70b7c3bb7f358. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/RUAH62430137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc7b2f73f88c594eee2d6b96e5e2614128e0934ed3a0d55f302e2475a656d06. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUAH62430139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0041fde72318171431a2809a53d309e127aa252141edd6f3b0cc1a5e151f84. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/RUAH62430146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a21f156bdf8a375069949ddda89b7231295cb939ef31811d68cebfb8d37146. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/RUA1D2549752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8816f21b7ae08a09b46026cf20d8641ba488742e6e3bc1139a27025a99ed4e3. 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/RUAH62500685.