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 0xb1b4d1b4ad5f6ee07a3e62211c773ff04929173ac8f52b66ed5eefd3b2513b37. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7b985f7-47d2-4939-a9b5-9e940ab37ed5.json and https://artists.proofprofile.net/proofs/artist/f7b985f7-47d2-4939-a9b5-9e940ab37ed5.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 0xeaf7a71b428a707351a4289d1a09f4d6e7a5839961f7548722c437f6e573ad9e. 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/DEZC62200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7a71b428a707351a4289d1a09f4d6e7a5839961f7548722c437f6e573ad9e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4770cf175ecf8a2058fbc3b6725dfd2c8030768df5322618e76609c1a2c44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62431594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f4a0a0e51b60e119710c97bfd8140ae7ed98ab332f21d2a25451ba3085f8d. 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/DEZC62431596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c2628c0b4ea0d795ac422e03e94e9acb4e8db354ca0d709b746cde803e0ab7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1008adb722060fdb68237a19ca0cdcfe672905a30b23d723e0556e1a332d6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62455824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1b82a171786cec4d77b899d2a8890a983f007aad4b07bdde88ca94ae1358b. 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/DEZC62466755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c2628c0b4ea0d795ac422e03e94e9acb4e8db354ca0d709b746cde803e0ab7. 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/DEZC62453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6586dbb8b05f2fcbaf36f3c97f19039c77e2c67a590880df4b726fd96bc0f997. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62466758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b8a78829be62aab46af5ba80ba6de00b3e349902e11fc7519b645ff04ede2. 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/DEZC62466759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1008adb722060fdb68237a19ca0cdcfe672905a30b23d723e0556e1a332d6. 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/DEZC62455824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dc8f8535b640ddd7e832c69535ecf0c6ea34b8acc735fcc75b76fba118d62a. 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/DEZC62466764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95d279851d02056cc81ecbd91a56ac0793af7f40ce8f5a0715cd9e1c9f58b35. 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/DEZC62458360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1a3093ebd1554c80d33f4f85a175c07ca807fb625b918f3a3cc82f771e3995. 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/DEZC62467546.