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 0x0d65f2d9d4a0d4421cefcaf27875c9cafe8aa94d59cfc5c83bbb38b20e927d01. 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/90a86bcc-69f5-4691-8e26-95026d5846fd.json and https://artists.proofprofile.net/proofs/artist/90a86bcc-69f5-4691-8e26-95026d5846fd.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 0xdf1d4d287691e2cd59812bbc8a88fe31905b253f81302dbfd4dccfb8ae0d39a3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCACU1669218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6d9fa01cf2fa20bd2946630a894a7b2c42183dd6a41f7c49db7a96731ec14c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/BEDS71905602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb014fe4753225171375e087c6f692e50b2393f5178919d4596779099b02a91. 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/BEDS71905603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f08d73cf8199d81f56fddf550ec38cc0754f406d99ddfb62fdad452483067. 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/BEDS71905606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140f29dbc4f8fa35f1dffa498a7f91f9d3bb1eee0f54018971316aac054eb595. 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/BEDS71905610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a61fb327ac479547f4902ac4348a2d417664d83e3ea40aff741c344df851b2a. 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/BEDS72107802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e506b95f36cada9a55e2cf92db65b37fdfe9941855e7d8f2df9113218036d7. 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/BEDS72107803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f449f46d5fab2b8c493218656c5f003fc21c91606c2d8eeac454cc2858088. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BEDS72107804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ff153382aef623514717ae4db1fb222701344428a2e6a0ad2d111ffa3f3fe. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BEDS72107809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8f73a66565ddf1545c3fd48911bd74db192b31ceb2e8e6891ab5cfb7a6d78. 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/FXR732407009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fa61eb9dd56e631c7ba1d5713e0ba99649c306319676f3b1dace014e521f81. 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/FXR732407001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce88b27567bada57764a5e96bce9f47c2a2294535a03a66a80aebed3e303558. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FXR732407002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1a5180899d9b2329464b581a14ae1bcd22de54d03d0b3cfe2c63d76e0e077. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/FXR732407003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342e6e6e17c11eb0ec948b753e3fee9e5b7f85c9c9d75e22cf13381fc1e4de5. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/FXR732407004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aacef7cb6bb2931d77a241f38699f5de9084ed69a893a0e0837666dbee0cfa. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FXR732407006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd9c0bab25b7548a08c8be9afbb73734e3fb2071d9a1ad69fed30682145f8d7. 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/FXR732407007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d06209670b1c5d0c99021e3381b2967314bf9b9d465010d0e4c09b7221d6f6. 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/FXR732407008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8f73a66565ddf1545c3fd48911bd74db192b31ceb2e8e6891ab5cfb7a6d78. 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/FXR732407009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22c977510d4636a88b2f2893a2cec7e7895ac05858ebbefcc0a04524592295f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FXR732407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8235b538d43a304988002174166dba56658feeef5f2482231c075736b478702. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FXR732407011.