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 0x0b0e8405b3afe80c921e97d7587f80d66e16334afd544e6a8e0117f5b57886ce. 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/3da2d0e5-ceb8-434f-8ae8-c1676fbd70d2.json and https://artists.proofprofile.net/proofs/artist/3da2d0e5-ceb8-434f-8ae8-c1676fbd70d2.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 0xf3a1fbd26b1df5759203c18417d940dc47c85b9a6d5417363b17d54a4f34b3c9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:36Z), 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/IDA142002593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff2064dffc9900ce5f54875e5ea73f99c17a05f619cea7ebf0381c218a9b0b9. 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/GX3HH2162005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d0d5bbafb6cc9ee884afd8b9b2844c235dfe1321d86a2679775e39b53ff35. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA052491104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15941a99564b15ffc26bd7068c2a6209a32efe8dd5a27a265aa7b74018c146a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DGA052491105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f41321b7e5d8755a5a0aca78b819fbbea7b67fd2e292e44413e5003b6a77a37. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DGA052491106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbcd6c80da54d4371d2620e73674f0ab9efc873cbeb2287a45fc82ec94b8261. 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/DGA0S2412165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2790a1b81d8e0afabbda02697e99374c7c7c07948440800c9b723160985b434c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR2X42254272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d2f1dab07e455b95237aa9a0922c41eef7cf374a52b8a365cab5ecd32986d9. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/IDA142313945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efd95f5db26c48743a414cc5ef62c625be626fe67677e83da389d7cc8ef852e. 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/IDA431916722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd090d9eca8ead208bacdbe3a94d006f033128aa4a26f031911d0992ececf4ea. 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/IDA431916415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1f836b267ab49f364305a4135350f24222d6eba9d08e30ea1feafa38aa945. 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/QZK6J2155959.