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 0xe3451e3709c4b4c195649834decf0b3e4adb4a64a2ed120db615ec6404624dc8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8f6ee68-de6d-4299-8a0f-9adcf6bd19b9.json and https://artists.proofprofile.net/proofs/artist/b8f6ee68-de6d-4299-8a0f-9adcf6bd19b9.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 0x5dbb30ba351e7828235baaf732bd9fbe9e3f36decba71f1f60be2c6e41f6fd94. 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/TWB519704002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448407072b17b3beefa562e70603a02414fe0898c321a7e00106cf07d1e736c. 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/TWA539400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343bc737f90877bb78aba1b4cfbc20bdbdf306deb5e9106b8b745e7b29add260. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWA539389001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0154c1213d7050c620d424e3219122eea2170167f6c40204450d22478ba674b. 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/TWA539389002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec99c0d4f0b12666544a0c19bd3b13a886452008bdb91e75bcd7d131a8cdeea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA539389004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c61ec5824317a33e5ef06d0ccdd13d8b32f318138ce27cf3fd098ec5b99f07. 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/TWA539389007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76050ad8d1ce6bad9b2ea686a879ac77d88e5bfc3da5ddd86bf1716056cdbae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA539389008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088567127e8c27e8d1d28642da344491da41fd6e3edbf156d4971bf9118cbe82. 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/TWA539389009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec12d0dcda7133b7217e2fdb0bdaaf4a553f3f66ad8b2fc2c3d01bac8bccbad. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TWA539389010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb33f6679790f2a3e3257014e068ca987cb45b173d55412bb7d939621808cfa1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA539516901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8d24e1031e7f95a1e7284c6ce476f9388ebbfcfde554e015de54878d0f3f2. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T22:53:31Z), 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/TWA539516902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dedd253fce36da82996a3fd7c11e3fd1ea9d6d54809d605701b866d89f3abc. 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/TWA539516903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fd467b1a7325236dfa53e3accd4403c280fcec6a46628faa9550a66e213fda. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWA539389005.
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 0xc3c939acf555ea2cefe8d9d88933b47ba68c85ced382dcfe2aa814c33f9e1b92. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWA539389006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1569d232b1272d8fcb8b3a1e23eb329e8117e0baa9e814074b81e5834080efe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TWA539389011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a2160f050798af7c07a79421393a7ec79ab50e7a656128b2f3cf2afae07397. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TWA539389012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44520b9efd831e164c6d97c308e874d7c42606674b5c495513cb3db22fcc5b9c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWA539389013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2ec1d95aeb47c6350241af7760f24779010d6d77cd42ead8f38b8b9889c95. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWA539389014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6aa28e17132fb926acbaa17dda11bd3ba28cee25243a38d110956025b0dbb8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWA539516904.