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 0x45ecd59f8e2b82025c49031cbda6becc066f47c4fde83ba7be01f5d3a0ec88bc. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39e5e6b8-7154-45ad-98c9-7c46898e2d49.json and https://artists.proofprofile.net/proofs/artist/39e5e6b8-7154-45ad-98c9-7c46898e2d49.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 0xe43f57213928c32dc0711022f9c92b032f396d6ec0379e67e5433a8c564b1098. 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/ES90S2201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3a9f73c65b44db9d80c758e304c20f3b60a91e724e97780c63e45963b1e7e. 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/ES90S2201925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1a670e1b4c9428edb6f0b8d426c644a97e5779d2537919c62a5620cf42ae0f. 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/ES90S2101755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa588b157b2dff5ef77e4fb30405699fd885ae11c54cd238879724ba05c2e7334. 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/ES90S2201900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cad114a3539b2ce5e1190b821157b4b03416783e8a589448e5cf9dbc6eb551. 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/ES90S2101726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa0e277ab1536dc7f98c55b0538672625a908c60410c1c1584f082938779f32. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES90S2201929.
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 0xcb0890fcfb8e90c09d004d0c9593e67d9f104698102bb6bf4cf1a5a858a04ed7. 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/ESA092214016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa240436884c0a42794ae421b5af84610f89d21b979903d135bf1a4cab02f08b. 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/ESA092214017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a9d2f47b9950ba25c8e2a3a37e1de94c0462a2d640d7590c8187b8f6d10d3a. 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/ESA092214020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84017091ed417787d898d4fc782bd1e2782e60f9b457500f36c8bd534daef78e. 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/ESA092214021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc18e71acbc9f8c33f04cfab8cb2b36a26b81ba2c585c24faa50ade014e2619. 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/ESA092214028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069ef49f1d57404b2856b60e4b4562504d579b5da682e1c6a29fb1caac9f6c2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA092214018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18279062277db4d0c1ad647456dbeddb50f1530e153d9b6a164259656b589909. 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/ESA092214019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfa489c26c40a822b933540a57593186e3aa041de072dd018c9fb223c1b9fff. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ESA092214022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e819d82b45f3da366e3eb981e318538041a139589ea497548a20deb10b6a111. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ESA092214023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed904bde2bda04bed4f0de5e3cdfc4c3de78a63dd3bc1a7b3426741ef40ead83. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ESA092214024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161642c58e857a38e571e380c722fd145be45ca1f1fd9de2b12182da7f05af2b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ESA092214025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f4292382c4164dcdf693032e02938cc1aa67b4e61f371d793209915aa44a13. 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/ESA092410353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0869f29c090df15f04f6cf4cd1f5d8fe434aedf8386f5205f4cd8caf710bb279. 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/ESA092410354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4b7ee483b8723ab355acd9b53ba1d4d4d8575212a0938313c4ec49ddd4d432. 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/ESA092410355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01728c2e67dfc799f75f2f5ed1d038a60c0d0917694e28f903a0218bcc6099. 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/ESA092410358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e18358800235be7739a759e748b9274d3557a9ed3b26cd2cee99e6ba086cf6. 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/ESA092410359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a7041a5c038d605a0553802ea4d0cd1a157af85a21893073e542e46a782307. 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/ESA092410360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282f330d33b08a663a459857610e625330e38aa797c3f4580bc3b28d044c68e1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ESA092410361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc689facd7700590b1ebaab4f8808f6a771e93d4d330c774a197952d2ffc59. 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/ESA092410362.