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 0x58249ca3794ab581a0b121804bf1c8598dccb17b0a75cf288307e9f405af1850. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deb8256b-118e-4b8c-9cac-2d1431f539c1.json and https://artists.proofprofile.net/proofs/artist/deb8256b-118e-4b8c-9cac-2d1431f539c1.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 0x3b6c0270d22a991bfe17914cff53b5fbb9bf951f68729f9e0f97d0c1c9a571d5. 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/FR26V2070336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c16f1ae3625b9580b611f89f22e1b64864a228d39c00b8c3e9b9644bb87a44f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:07:06Z), 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/ESA012043057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f84e912f6527594866ee84031e01c7f6380e539ac2a6f52a1dea88ecd376a3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:39:55Z), 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/VNA0F2126129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f47d652db9edf808b28395317fc60ce23c8a4f73e146409d974d51b7d67bcf. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:20:16Z), 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/VNA0R2000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce467b5c79102d7a4b890f8f317d226de7bf1df2763181b691d143d51b0d5b92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/VNA0R2000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5da179e910d639d781bc8329d0db2a82f0de583d29e72fb551c81f41bead3e. 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/FRX202208468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871987f37dc744adb39fdfd8d29d4e19571206bff6a6e4b289d3dc33211fd6d4. 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/VNA0R2000451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96511080221c8866a88f2ea0129362ea670165db2e26577a10b3c29a14dc85d4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/VNA0R2000450.
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 0xc6af70a6c95111cff5ed67233c5c984229058c50c1841134a0cf9ba25bb1c826. 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/VNA0M1930311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30954bc3f74f3ffced30d89378b8c1e30b5ca5fd19861cc2ce1d203fe4aeb6. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:39:36Z), 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/QZMEM2364267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd02c61c41c3bacb97ea58d5ca873484c803089349521ad417bfde6764cdf90. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR26V2070335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db0ea9502bb3c8c03deeeb4a9f092dbea3259493ec99f7c1d1040f46770c016. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR26V2070337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68998ef057ae915131c1c093408c87dcee24e5b8c5c69a64131a05a94dd90ecc. 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/FR26V2070339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df9bb43a85f462f58d39d18e336703b66ea7ee29d1f588233b37a8ed8e10392. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/VNA0D2401388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a0635e0088ac8f123cc0569db92c583b3f625e92a5cc8a4dd3428376486a06. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:40:31Z), 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/QMBZ92524310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1326040f688d5c1f5b57d1de82a1e3d8e64c82affec247205ccc059bfbaa61. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX762532432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977519427ef609149d3c17a8acad8d5e4ac131fd06f17ee51e732471150ccc0d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTVM2536677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99e192afa12b3d4083cd30d2dfc0e11e2aa32db9d17a65eac5f62f5223a38c. 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/QM4TW2361376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894c66e9384f7a0a1cdce089c435632e6686c70c7082a5b38157d8b9673dfee. 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/VNA0M1909777.