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 0xc86718b44b0a6784ad40054acefc033be7a843ecf8bd6021be9230a343a9c88a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c824140-3d74-4331-8c0b-747020ab8fa4.json and https://artists.proofprofile.net/proofs/artist/8c824140-3d74-4331-8c0b-747020ab8fa4.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 0x7f086728dff0d7317dbe5223d8cdbae8240b132f7b6b2dc6d176a2276ccfb4ee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:29Z), 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/QM7282000436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af2bf20c92231791008aa515760a6087bad5d9359d43ba7fa02209e177f3349. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6N22227216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0917893c67ebeaac33041352e59d2503900c79a65cdc221f09d6258870314. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMDA62298563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571107643d69041d600e15b03f2dd71f4152e44cc6268ade4431fd8eabca3aca. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6P2475820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6df8f0f6cb28965e43697633df5e58bff5df14fa3d059a56ab75b1e9124aa8b. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFH2455938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21459eb3171884a394abb5f1020797d53391298b8a7294fdcfd7f2dff1a2a8. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZZ7L2489952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3eaafbbb35e8c0d422f5f40c283521cd61bf96d8b7d2ebab578ab5f786bf59. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7L2489953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6717eff6750e9a6dac610104739408fec79002efe1cd82a519d27a954299b6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZZ7L2489954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa862291b4bd1ac2ea6c8124cf992151a1143e00ea4fa701889441382f30ee93f. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZZ7L2489955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67247abe63e358c0f78f602dcd30d7a8c018e6402f2b45710543d690bc2837c1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:06Z), 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/QZZ7L2489956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69ea2e01f064ede39a13538e56a17c2c2b18b02520582352ac229ebec9885f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:08Z), 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/QZZ7L2489957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071861d6aff472d7054420f045670c179d11c29fa38a5760f376a4a28730b6c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:43Z), 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/QZZ7L2489958.