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 0x037a054687a6ff4c67f78bd99c24b7e5ea929b34536987ca4510fdf1ac725e4f. 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/7918b0e8-ec02-4176-ac05-db50ccbb1590.json and https://artists.proofprofile.net/proofs/artist/7918b0e8-ec02-4176-ac05-db50ccbb1590.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 0xc6f42a16862406f42163be8932175131c21ca7767f24c33246915b9589a6f2c7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:41Z), 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/QZNJX2547667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3f70954b290b706e984fef2a215e77b4d211b55a0ad9bdeab3aef5731e356d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJX2554658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bee3e8239a400aaa1c1911b93d68d925ae232286f07b804d9772940f17285a. 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/QZNJX2554656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc79336d7c19aeb2df7c45359a24a0a37d6cfb6fe661a2456cedba3fe194333. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJX2554652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894cc9db3443d2dd82c9c6f17328118af3f7d7f94f87c4ec6fc415b0b381b83. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNJX2554654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0b8ee9a5b09070a77b0dd44e31543879ce0484b3812fc428efc88addd80596. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNJX2547668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801b37ea6b6ad86b0acbbde4ab1fdcc11514c3b087f192ef53aba102d2a3c53b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:09Z), 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/QZNJX2547653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bd9f68bd1867be18e876648fcf494939fd34396694b9c5f54bbd138737901. 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/QZNJX2547669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a832dc34502d42aea32e7ff9241388184cb34e40da3379a0eac3d5f7255fae. 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/QZNJX2554650.