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 0x7fc8dcb9400383255a8fa730057fbdd8f573f6ec6f9b79b31e0a4df4214afd41. 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/074a12c3-0733-47eb-b9b9-2362b56d71ed.json and https://artists.proofprofile.net/proofs/artist/074a12c3-0733-47eb-b9b9-2362b56d71ed.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 0xdc95249618e96e8c3172b79c51844b8d74955f30c6476cbda379ac166555a319. 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/RSA221832549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3fd16b3e0c0c6a86951db784045fb208296da4063c8d0cce3b8cfedc5c06bc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:50Z), 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/RSA291700429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd5cd80e77b4d0a01d92ba428acb1628f7691d6eb2c59b21373518f1d31726c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RSA291700433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ffde1fdf6e268e3383c286e6a349f330f49ddbd56bce0361f4b8ee062acc6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/RSA221830872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd768be21448a91d225509b0e4ddbb1ea514b54b0cd42fa5a16f4b2cb176f3d68. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RSA291700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f91ab711ca431393d8c6764e073982e4964419e1bef6cc4f393af9d7b2a821. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:56Z), 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/RSA472100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5e440a14bea5270f9c13cc57c3b6ae7ae81c7745edb750cb028175b29ddd31. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/RSA472100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbcccae6ba67f65ea66bdca6a90584b13cb2fd4e57d32bf01e866c9b2e3e7a7. 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/RSA472100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fdf9a76c86ae4689fe97811fce4899b551ce92fc4d82135b8f47a7bdb2856d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEKB72529546.