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 0xadbdc4ae307ed06d3f02ffcb6ed80240a5f38a8e3e47be144a7d4f6b37b3e6c2. 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/c093d206-cba6-4c79-a3c3-e158bb32453c.json and https://artists.proofprofile.net/proofs/artist/c093d206-cba6-4c79-a3c3-e158bb32453c.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 0x7febb1739b5ddd391210319da1d982b5cde0153815dfe3eacc55bdeb406a15ce. 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/TCAHM2306231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97be41efb05dccffc0504ef72a333e722ef759bc9e61cd302ae1c0b3fb676bb. 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/TCAHP2370075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd23ea0a5a432830ba1db51ad55129676d3713c091867e0a41837cdd21745c3. 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/TCAHP2370170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007bfbb574dec44b8bc23b40d7669b24c7df60092aeb7ef13cb4def388a5836a. 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/TCAHP2370251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e77457dff1968e9706f4d9f356b656fe7e015d7c1ab67259a8c0194e55609. 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/TCAGW2327439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2e1bcc3f79d545fbeba52fdc76acb59ee59daa3470890ef1bde2be5643bb52. 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/TCAGW2327559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419507b3a0c0481fa1a7969859bfa0f29263551299e6159336414fe8b7f9c672. 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/QZDQH2393005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74fa118f2f9829e684225afd29c8c84405b844919c3960c8d8d1e00fe5260b6. 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/QZDQH2388407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53960b66b45df805494a5b6d55a38c20bb31a44d3c8ed15dbfbe3c4fe70ee70. 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/QZDQH2388406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b1a1f0a22e0f517d82203334ed0fcc11acdd5923164f3228e5716b153c4eb1. 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/TCAHN2387717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a158538f183a7d9fc9a3a540296d2089d0a684ab47c9e982d13df2ebb4e53c. 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/TCAHL2376273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0387dfdbcd5cb63b80aa68f4af430c8abccedf7629d2c6ab0e7a32637a7c677c. 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/QZDQH2377917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7a64b2cec2cbe72e63e5c34b76d180006030ac797d16123eece01640f2da8. 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/QZDQH2369233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e6d9793f6554f1ac8075c6e79e89cef9576ffee88d107e7dd62b6e7e27905. 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/TCAHT2476346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b4583a9332a9e8f317f365138dc4d2e8a3b5eb3481017bac1e88db74347e5. 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/TCAJH2513704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60501fbaa547e0ddb6cd772fd48d04e3f2d3b941cea8ed775a11ad17162945f8. 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/TCAIV2442452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f295631fba734e9597cf60ad6a8ef385fd03f07f1cb354fe2c52ad29133f7f3. 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/TCAIM2470408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eff91c8341a4a70ea2fde9b7d39da0b9fc193e5ffa8ce332fe972a951d7d83b. 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/QZDQH2421567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965cc7c9bf21f966ac2815bd88b3da7d67b7517007402701c63350aa3ad4d284. 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/TCAIE2463669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12b676b7bcd96fc40bf34b8dcb40f460c8b9224742e6aab7359c318707f1ab5. 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/TCAIA2413943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd703c5022deb005b39fab9d09f311ea2cd8aba29bfce9613605ef9ab67c37da. 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/TCAHY2496954.