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 0xf9fe0840336dd361d6ced07181b62a9cc47aeb0779b6fdb547e0d25171dfef9a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2d3eb42-a2ff-4e0e-b0cd-cba1448f234c.json and https://artists.proofprofile.net/proofs/artist/e2d3eb42-a2ff-4e0e-b0cd-cba1448f234c.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 0xa1292492bd1c223e400ba9f81576319634626fb1d75209252d4a55cd8cf7ca39. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES71G1927881.
Loko por la City (Walk It Talk It Peruvian Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfc9f71e4a21dcaad9201c20b4041c65d0c24182e07f5de1b21ee5bf87eddbc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:09:31Z), 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/ES71G2133668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845163577806c72f552829dc7473b146dba074cc44f2e3c2bd673ecefddeea0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES71G2234909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b76743f168779ae6a2ab7e9d8f6cec8b1fc80725f1f377718837b8b768f01. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES71G2247010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba171ebe1ffd7156e1a0459074b4c43193a9b4a720f7d8a31e16ce72927aeafb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ES71G2247011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e8fd89693918c5f14300d41f2ff63d96c1e483c021981522050c58928bece3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:45Z), 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/ES71G2247012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2f72e7c11dc6ac524420336e4b7fec4581f0e012c0807ec1fc8c288e53a267. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ES71G2247013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf53ff8c0c3a50bcb6dec964ac3fe542f7f6f43e7e6d92870c18e574546eb6e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4Q2319306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1276e57cdb4a79bd8951861fd5829e7f8162bb02c3c9eb36604c31e09300a60a. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/USL4Q2319307.