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 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 0x4e89923fd5cc4d85b099dca1e5e4eec3bdab8f05dcfe98b5cf368064a2a5a704. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7405ba47-eac9-42f3-aa79-1c1c0701da7f.json and https://artists.proofprofile.net/proofs/artist/7405ba47-eac9-42f3-aa79-1c1c0701da7f.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 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 0x3a322cb45231644ec2ef24d1839c7bcbb2f2161b00a0ff95205e403ad7f243d0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEFS42202369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7798563ead24294c9e64b02d716d334a44073bf19cd4ab5f480f95462157a252. 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/DEFS42202370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2256099d7283571791ddaf8d23fea0b7e1c2fbeb48376d6a38127b4ddc7b4a06. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEFS42202371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be62659a0ddbcc7226976f3bb7b8edd3ed4c10dd680b36d4df72c4fdb9cbed8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEFS42202372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f902a721178c3d4bf9d8c89d315804e240e261212f2a904ae0915b1c5c0f781. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/DEFS42202373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040404bf89b780d04f4288b93316f91cb60a5c1a3dd60ae505d0651b00c61219. 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/DEFS42202374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85606df51898f187b6a3f472587c25bd075719c97b0f541858e78b307fec9d6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEFS42202377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea687dd670232513abbd20775f39cbacce4227f7ed2463e281f4f9213192987e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH6541786488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d22fd3f8ccf9204a063a61bfabffc51f373f086ee39f501e77e31c0b68ea5. 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/CH6541786487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1715a910b72f4fc0468a7054b7c8d40615587ee866ca4a19bdf94ce881587a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6541786486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca6b945206033da40dd3e9a6cc1c3f2a8a5dcbc7130746676c7b8165d494f33. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6541786485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5091392ca3fb5457f7c55060a0ac314c648d9280f4abde58831e91c579a274c. 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/CH6541786450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4b6e8901746c4ca7c23ebddf4cafc597756201dc25d1945fd815e7488457e. 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/CH6541786449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4da45017d977e470404ba083f0ab08f2768a05e94ca9c88ec48c9f11c8a04f. 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/CH6541786448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b81566f58995b95a0800b14ab32b4f7dca726c42dba38fe615df196e6d95a4. 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/CH6541786447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924068cbae0f47128dba4b59577860187c663dea9d3bb5aa0fa20bc9f8520128. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH6541786446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfaa9053418f03207fcc0c163bf9ddb9b327b4c56d76458c6af5eb930f33f97. 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/CH6542379599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091b439bace9dc4a3d833cfc386ebc6dbc2b4ba80a968c2f19ead15798078c7a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CH6542379600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce54b59ad6a9988d72d98b645c99c2ad6e0b64415f9df9a4e5b4f0d63d59b5. 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/CH6541669480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9658713bd671078697ff76d22512f332e5855e63b6ee0f5ad7d60938889391d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6541669484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269201e812064276ba58b80733be379c1e0724dca804c9e9408766fd5e0beecd. 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/CH6541669486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf956cc857638d98c11513db87467b638d499e9bc23bc4e190a58f8ecb393078e. 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/CH6542013086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450a4c173f460dbdfb0af17fd7679c4ae981c4003e834a07a9705429b9840cd1. 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/CH6542013083.