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 0x59a4bc020327408f0f8c64f3d1fb0dd24fa6ef987c4d1daf874bd990e3c66049. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5b20e72-06b6-4487-8140-11bee95e6ce2.json and https://artists.proofprofile.net/proofs/artist/c5b20e72-06b6-4487-8140-11bee95e6ce2.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 0xc7bd95da6f5f4be1a444f62d39d9967f5f7f96416693e737c3171ad3fb5565e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM92191670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9eae29a1d298da47bdec9a43923f61a86885fe75a02c5eab9da86ca102ada2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:29:36Z), 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/USCGH2226155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb274889fcf5c41c3eea4f862f089d74cde91ba835e0b858cf73642a5b21b39e5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:56Z), 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/USCGH2252453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca158142e6d1da2e3b026a240aa9fc7c2cde409ae99b21243dfb94c99d0920c1. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/CA5FV2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056dce72539253d51dcfce0fe5f6fab0e85c59e588e236062320b60ea7e85e2b. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/CA5FV2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33c453d5f9da37806d6cd5a3a3d2a2e8f7d166b714479cdf8bac1d80707b0c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CA5FV2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ada707c15d83b2770592fb50fd5554475fbcdd849da7c7931e25df8cb1ca4. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CA5FV2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318723f320e21207beba6a68f4292dbcf953d08d552f258ebb5e79750316a87a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5FV2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8db217abb1505c88f4c48512254d8e4a853331140858e720292d1ee0e97ed7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:06Z), 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/CA5FV2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a41e45b99c801de8096390954aeeb610d1949be7d53d25a197097b6270dcff1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5FV2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3e7f0cd74b5697b80edf75fac417de4e5ce5eb957ed7f1009f375a3547a32e. 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/CA5FV2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bab466dbf88002469937db5aaf0546285facd2558ff617c581107e2f8f2c47. 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/CA5FV2400010.