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 0xedaf94a94728b6a212be9c4b529b352012c8cda892ba0ee7a96f1bff033636d4. 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/fbff5e84-3bb2-4a81-93cc-372c0ef79eb3.json and https://artists.proofprofile.net/proofs/artist/fbff5e84-3bb2-4a81-93cc-372c0ef79eb3.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 0x72a32484e8412bfe200c52f009440163ab5570ededa3548849e485ceef161e6a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAFY2121503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa54c03663683fb668434b71fa88822ffd998700d420e5d3a6573ee27fd690e8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAGC2295175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963756a24f9f5d1de4d0a3d982ecca6ac8416cc1fada5e1c5c54165f482ee70f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGC2295195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d710475245173075ed95064d37a60e6a44aa76d15081a06325a061a7cd58e3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAFW2188075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7bdc501128b50070a0f194a92d3f47f56adc3ee52bc45b801ccbd6ec757478. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/TCAGC2295216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6baaa6f14feb27b1c3666b2d4431481e659bf5bd886b80fbcfd86958062733. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAGC2295218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef38809dd2fda69e85fd37ebfe36f33f693023a4f93adcd5471e896a46866026. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGC2295229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d55b7da5e846d8a1e583d2542eef7edee1144649fee8fac3be2d5fc1ac8d91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHG2336012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203ad6a5447690fc57d68b5b743fe1c560fd774878146e34609a21fd22e95996. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHG2377993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862b8413ef64b58bd79f336882bcc788d6caa6cb15b8c5ddb97df93fd68c1b3b. 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/TCAHG2378002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b93304e1de181b3cbed0c80dd45272b27123b2b498b3f95cd3e1c98d5efedb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHG2378009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b0e0c1c8fda5cd6eb391bf0a7cdca74120a7888d5a2608c928308b23c6349e. 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/TCAHG2378019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b7fbc960c96724d36aa7159a20b890c4696c415d9ef38430fde03e5d03a37. 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/TCAHG2378023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536242a72ae6c403de564e1f0c82519eee715aab311d9aec93dd053c18bf1e32. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAHG2378026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8667b4927a211733374fb2c2a9aaf44005171337580899fd4ddd6f1f09ede13f. 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/TCAHG2378027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b02bcfea247f74e720f9090d04ecb5dec78a27a893a328aed4ffedd7739e6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHG2378064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d55b7da5e846d8a1e583d2542eef7edee1144649fee8fac3be2d5fc1ac8d91. 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/TCAHG2336012.