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 0x177bdb2f044d0a6b03caf7b6bf439cfe349c476d2107cb112b79a039b365d576. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a5a4c7-6f24-4e38-a251-8887fadcd2ea.json and https://artists.proofprofile.net/proofs/artist/91a5a4c7-6f24-4e38-a251-8887fadcd2ea.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 0x155f387a204581825caa2c27c5de83ccd23e773e5be1421de40fa105a0f03498. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:29Z), 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/QMBZ92043611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed68cb3908be6d63be2b72339891cb23de05e45b9b22f8ce04646b37d9e93dc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:38:05Z), 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/QZNWQ2102999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd581194dd027e2d00449ea7345e8613f7c78f7abe8d7e70a9f1657ab3a210. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB52314985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd204cdf828a9df0b47700894a1db70ef6ac5b574d7a4b994749f5bb7b86a6907. 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/QZDA42422962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2423e21ade3529865b1c54908c1914257416752088f82f52136b52b342489b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWS2494266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd581194dd027e2d00449ea7345e8613f7c78f7abe8d7e70a9f1657ab3a210. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTB52314985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b4cc803e89edf45f87f92940091143875a6810dfefe519b649c7b82a7d766. 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/QZFZ62576235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2423e21ade3529865b1c54908c1914257416752088f82f52136b52b342489b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWS2494266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029de88386512ca3be847ec108603afa7f4dfbd2a05c2e16af7c2516efe5dd58. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ62576236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf590e7074fb5810d024779bb7f0d30241c349f89f4396343a28b5a8a80960128. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ62576237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0de1331aa18e67e95cfb9979991cc4eca43f470c7ac4251b34de5ca37706ad. 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/QZFZ62576238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b09f82a15b4d766bc99bcb25faa92fc7e2794bfecb6233190f3e0409a3c362a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ62576239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa20f81b71388ee684e28e685e270b8b9a694d32193bd8cf9f50fbfdd1ab80. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ62576240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf926a578bca0c957861cffcb5d1a268f9a2db74eb4c4d753ed9f3015c400c66. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFZ62576241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f44ecd11fe1555e46b8d1f6383faea6cd5cabe6ee19d9da51f5390a103abcc4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFZ62576242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784106709880f18cc0e800e3356a7e73443d529dc9506b680f7d8e5b15f2c5c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZFZ62576243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf462ef4e9f07b459bbbb6e035b344eb9c613b152b8884474eb32e12dcdd19a3. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFZ62576244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd204cdf828a9df0b47700894a1db70ef6ac5b574d7a4b994749f5bb7b86a6907. 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/QZDA42422962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40aeeaa63fe06b6b90e96c60547891f51c82b69a0aa682020c000432e4b3925. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ62576245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674dd19e18755a4cac7378cced86a836dfc7898a8fa9f4cb9a1e373ad9df4412. 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/GBCPZ2120433.