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 0x828952724b0deadf5d6a3c53894a508a636b4a967b1713a65e6115377accfcb1. 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/631f1b50-193a-487d-b910-1a0781990421.json and https://artists.proofprofile.net/proofs/artist/631f1b50-193a-487d-b910-1a0781990421.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 0xbf65669d735da2091ad95ab814c87e2bda9fa64ece9cb308e09b9d3ecb7b7bf3. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AEA0D2002911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa588b3004dcd185a7c147aae27768653137c7eb49bf51653882786ee78ea68c4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/AEA0D2071624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca1ddf23edf58780d4ebf06ac1aaf9b7fa71027e62b71671e6d109805fee86. 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/AEA0D2071625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf683261fd1a7424a57bf42ad3c97e01710801270fea0dde80155b9ee732688c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA0Q2149065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281cf059981f2e3f45d75881eed4b016b6ea374fe64516f526e3aacd4f68ad4f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/AEA0Q2178060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be8b6b6e77ebeec86ba7337fc4578266139cf4f1d2500c8f4f16b8892f547ce. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AEA0Q2178062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bdc878a4d249edb84b35c0f5ab5c42c2b34cc6312c31ab7b779b72e5c23cd2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA0Q2178064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c51871749197faa3906672843d5a027270e0f474003e114000e1348b948be28. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUA1H2280885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10727907498e72ea3444d0313045aae501c4094983942657217790f98434e4bb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AEA2M2208207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934bd830f79b9a16d9b8284d2ec04796bf118e2809355c34064688d1b8e34391. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282210231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df5e6b6f902bfd5b5867ea87aaf3d1ae3175e8662429f4c9ce00c9dbaff346a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRX452253608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b014de7a01410a207297f7d3a3cc4e81db9a1e8057f383abb938b10f8f5ae2. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR96X2329068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb9570516b833d55b1350ae40dfa469ac5cf96f5748697f507322eae07583ce. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM4TX2311747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6b9404432814294c3b27746e96e25563528b664949a1313a7e54befea141cd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX452304784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e63b83c159b0fcc78615b036cde32233ee9713e54dde3589546e145598708c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX452398353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5c3da1ab5c7fe0812c44aedae25ed24ae1fbffde085c32328cad9a885cd6e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7282378424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d731c7c693c5423be7d9fa5ca44c8abf9a1b0351647806e5a484a20b1a6d15b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMBZ92365706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479ca63b33fbb6d15b04a99b7319799cc6d73b4285f2ed40145ffb29aab0993e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMDA62394236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91c7b14d0e482b30ea95c9cce7b8a91559513e4c370d635e5d693a80c76ee47. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QMFME2343469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc516fde854745788ebe6e0257782198c3bd9b5b2c087392e670db67ef3ff303a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2399282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ae738651de713f02f6dbd1c9e8ae7277000574da0893c52891b4a60eb99313. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0P2384855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce417c115f93c0eb9be0e8600113a1328e6ed20cabda1c23dc90cb4a0f17413. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QMFMG2361545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f07abfa9f744cfa500681156a09cee85ab50123b595a79abbd0f05981058e4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX452445477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3b579b60a4942df8d6a91cb91b5ca5d090cea0bfc8e2c079fdb2779b13a249. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA072494169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd75ca569568151147f85d80b5b59010c6462c27c5da680d23c9e45396e5371. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA092413366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698883ca017cb3303b8a2f53a23ef85b635a333b15fed5c11768571d774a1dc. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DGA0Q2428660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c6271a880bd691e0485db8f736f7b6971604dba5e28050c3ab3631eca4d822. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/DGA0R2452151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ae90d4d91d9c6600141501bf1497f72c1e41d0851736d244ec9517a0f2c09. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA0T2400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d77254851eba390a2ceed6c916194bb31c87380678a0e5a2d2cfc4ceeb6a91e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX762505936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d591bf948673c02b8866055518d816d3331eac57628f528f3b27c054637248d. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/RUAGT2545703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cf32af8bf90e4ca455827ec66e1c593f19fd692ca543b6c2a062fec0b6ceb3. 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/QZFZ62373236.