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 0xd5e5f5844b79c3164d443dd3531c1fae982618a31334ba635490a97f19c86503. 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/babbf364-847c-42be-accc-a27bc0d4da4a.json and https://artists.proofprofile.net/proofs/artist/babbf364-847c-42be-accc-a27bc0d4da4a.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 0x5f6335d097f0d2c450090b7a927778cbe5cddf58ab400ecdd823e67b4ae439b7. 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/ZBB852500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd050fe997d0a52f3fedb55388e15daa256dbd95364ec3ad716248d6003c0c4. 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/ZBB852500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4403d3065ac707cb968d546592e6c404dccf29559fcf1c660209df82f136a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZBB852500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc262800fa7a41a66abaa5a8e8ee2c6aaf9686ba29cc92c6cba9e0b10b9db6722. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZBB852500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02003803c948905801c474a2a56579fea5f68e0e0876d99f761142716c18aebe. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:43Z), 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/ZBB852500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435947206ca6e8ec94ce2bc754568c24a078ce025a87b69d1dc0220b9e13e406. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAUM72400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51157564cb2674abf0d5aa0cfa1320fbaf9a32f612bfb0a25693f2401438fa64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAUM72400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20199e9a08428581f05dca28467fa6da3fffacb154a257d9a52c2692943783. 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/ZAUM72400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6b6f9e9b4dbe81265196c7156cfd465c54e1e45f353222910a5299a53cd8d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAUM72202631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f46807c9b3879d06f756d6f5bd88225a0e260e08d61e8fc9f09b632c5ea032. 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/ZAUM72202635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aebd75ac33bdce6b95acd1fc63834ffff0e1bd7382dc55051d6c1beab992f9. 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/ZAUM72202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f231ef687f7e9ac022b2281b1e3f3efdadb60fdaf4c5e671fc87d2e1d2c88a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA56E2415705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6b6f9e9b4dbe81265196c7156cfd465c54e1e45f353222910a5299a53cd8d. 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/ZAUM72202631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6b6f9e9b4dbe81265196c7156cfd465c54e1e45f353222910a5299a53cd8d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAUM72202631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31121411f5f75d0542e7a870f063445b14d2fc34a00e435124eaf41da8e79746. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2442256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe4ac8ddbe2e2da969400f01492f3baccc5bf7e43527c5fc064f8db43a6690. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZA7A42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fb75c024f079451e781027fefa8a7c7dd26e6eb57dfe8e86d023e82b97a797. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZA56E2415702.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch