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 0x5a91143eece4f3343f664c11142500a1d8b232259ee84cb9d471da8198f41df0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c2c17ea-0cb0-45f4-8dc5-c823c761b2d2.json and https://artists.proofprofile.net/proofs/artist/4c2c17ea-0cb0-45f4-8dc5-c823c761b2d2.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 0x9e54de7802aaf51267b089bab4eda2582ee8064aa990854b913a55d9cbac2eda. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6F2442748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd54fb579ee701ddac2157bf5699feae8ab2283873d84fbd668c5b047c307294. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZK6G2435739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dfe7557e9c8f86458dfa2e2acebbdfc09293b1aabc85535b901520f36a4d7d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFE2468440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb23f1d3e336fd5fe2dc8122b9c094b439531fb4b37d6e006220be69cd68ecc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFE2468450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3ee1939b2f729d15a1c19aa32300bc0826fef5506ba797daf3ad6cb4b0b15b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:52Z), 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/QZWFE2468442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644a45d8ff3bf654daa173349bd5ca94e733c2923088018d32ed1e674e253e1d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFS2436146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6ed8bfb15ffa3d0a4d53ccb2d81b7c89cc629509e26b26974582709e40647. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F42435350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e3abc8670e9e253846a84d740d54804f3c0ed375d4fadb42c0d736e466e4d1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA52565450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e68d11d349edc73fc64d0f498487e6300b74af43c94dd6a0509316ecfd73f65. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHN32515546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94ff0daa8f259d710e583e7bca04171f50c975e886cdfb374df0a86e14aa0fa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:07Z), 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/QZHN82542315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe14b6bf16a29918c8daf89d3a712b8cc71c812c644cb2fb7f81577afa7ed3cc. 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/QZMEM2503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a76b22fa3b500d5d982c6fbe2f131831668f09e280c8a20b49c60689f99e2. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:03Z), 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/QZMEM2503036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d96012fb9596ca67f8af651085b8c79d078a5bd9de18b5bd4b9b1cb378c7a3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:48:59Z), 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/QZMEM2503037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6f40beaf5173e259095aa5eb4f23192151a71340170d33d0d2a144fa2b341f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2503039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9196f3e5f52b75ced5c4ed1e23465d95a54389209290edb3ef642cea6002d0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTBE2574506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec23c6055b6f5367124e2e09ffb92a6d840284a231f21a5ac3444134a55cde. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFK2534594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea556bf1f8cb8977a9dd89fcf8d13ca9853f4994fbf60f5bca610ab02a223b8. 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/QZWFK2534598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c0cc66c354bf9234e1beffc75e47f5477f4389e6c9a8b952db51873a0fcd46. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFL2585128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd737eb6f462ce66f310c7b5f81aeb56fcccffcf135c7235d03a77e1ac9f07d. 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/QT3F82512638.