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 0x439c0c05b4993376627dcacdf88d1cac5fa1f3a480abd783958a103438a481f7. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa356110-a71b-44a5-9615-f5ad8646739c.json and https://artists.proofprofile.net/proofs/artist/aa356110-a71b-44a5-9615-f5ad8646739c.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 0xce5bd7c4921f72bb3d997105e236ce57215df767524da9976cf59c870f3fbf0e. 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/US2S71869001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06170bc363f67a9bafc951a20a2191f2a91b2d5c05c1a9c71386ee5817fcd31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US2S71869003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469703a0fa5afdab9ea832c79c3a10f18a0ec476ddcfd352a4119c091e033b1. 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/US2S71869005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb5ccb65a315cb379d550a3238ef567892a9bdf842d7ae9e810d1efb9a49f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US2S71869006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe374566bcf3f8b78303a6da16f4803e576ab1d982582151faf660b124d892a5f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US2S71869011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d0126f8a4f86c9d82d8aaccd6efd1b34014965ab80e2309114995a77bfeccd. 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/US2S71869012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75179dabd1f4f9d9d5ef2a8c4d3fff28498e020c057f38facfd763b88df4a3d9. 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/US2S71869013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8899966ae1e59bc8badee3272a47be55a8cf9177749f72fb7b6e6c1f77e5f196. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2S71869014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab131ab071afb5e9f0c7d33ecbc5c861a0f58547ded50c7e68a96bdd7269ef1. 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/US2S71869018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72472d9afee1db8f37037b1fe91d04cdae7cfebcf8ecf9b5a40326578b215a5b. 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/US2S71869021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d982815330f0129f9eb678673253a72744243127b549a5800650822e58ccc4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US2S71869002.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38224cb65b52fcb736314d1f109cf23266079f8e59fd0fc97b402509b1327bbc. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US2S71869004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac09634199772a980f9d36a13f7576bec6d91ee24bfce8755f3c82fb3c2ca16. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US2S71869007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17569a9e552b86056599577a865d6dafc84483aa81862a924792f3da1a7c83. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US2S71869008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc784c5487ab2bd02a7d78f2cc344e174922866e07eacfa056baecbc10e716b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US2S71869009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d776f534006b5c343eb828b68143a6436b4c3b45d5807aea67d1d37e71b2cc. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US2S71869010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c6992c37930ef3b013a782b71d4669756c000a956d34a3bca19ff55455a7ba. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US2S71869015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55086d385b74fa78270a67749954be1add9b5c350951247f8816d124e9bc79b2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US2S71869016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc2a9529a70a7930a718d26fb093e10dfcd4a549cb833ceea9d3d7c57a6fcd. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US2S71869019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25235fb4df0a0ba0dacf5bf5a05bcf948a4b6dcbca1152765e9ef831b4b11466. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US2S71869020.