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 0xb52dee44f8cd00695e0290de67c85b0287a9702436e233cf104c65d633725918. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deeb16a4-df50-433d-b63d-53336b0ff0ad.json and https://artists.proofprofile.net/proofs/artist/deeb16a4-df50-433d-b63d-53336b0ff0ad.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 0xaef93b29598002fe65e12ab5aa49a679c8487e88edbc0122378bf901d19139dc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NL1AP1956984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d6088c3e425a03d11577ced56011d0f743b79d834367cd2a8b211fa05e269. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/NL4NL2157916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9820f73a6035bbf8c0841cce12825c84f645f3b717b7eb5a4c857995c20dceb6. 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/DEYW82306407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f8d494772d648b9816d3dfe44502c8fb8c47c1de2fcf254b49a5fc37422605. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEYW82306410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4615d80c40a1cb435326ea21532baf58f84ba3e7ebe7df52810eb73c02490996. 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/DEYW82306412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42c75638d0ae8ba863e8cc799c2b3050346fe1bdfacd15927be49fa52bef04b. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/DEYW82405355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb955eeeda67946966af0d16deef91a99e4621c23d7da5fd794e93592c216864c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEYW82406501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76ad794df0248f84b446047dcebf91a27118c481991225357eaf78cc3feb2e7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEYW82412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da313a0b54915e671b98ae575ba41a045e9d9589c952f0ff964db0e8cc90919. 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/DEYW82415751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae1418b7660ae2d8703d3d166b63b71aa63e14724202b4deae6505f885198b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEYW82418434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec5df86f8751e03afeb7e5a8e97d7e0941bc1be2a3611c0d272d36b265a968d. 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/DEYW82419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace864f20035d514decd6ed585a28617eb7705732e03d960a3bd8664df0b054. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEYW82500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cc3fc0cf97837e08b5fcedb56d49e30b8ff5b69a7df61aab22ef7b4a59a553. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEYW82504011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa99db679317aa22d47678eed48dc48c2f198c610c6ef3a52575addfe59ab5cf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEYW82505058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0907327069d7bd5c27205160490c136995d96f8f604b3412737eb8ceea9e0ef8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEYW82506051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1240af7fa6dde885ba0c3338587d778ff1a46c163a00d0479717dcef142c0a27. 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/DEYW82507682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3164b180c1e5105305a473948248307115ee3e8e4ec89d7e950dced90ec09485. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DEYW82509627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb01a65b30482ed194d8d2fcfe7a3c6ee09718b43f7e59e6538db843df7f22d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEYW82515170.