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 0xcfb02796387e27559a23686d941c07069f011b89bc9ddaad1d08946cfde49437. 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/cfcc3ee9-4f63-40b2-b6a9-62e6f62df8b7.json and https://artists.proofprofile.net/proofs/artist/cfcc3ee9-4f63-40b2-b6a9-62e6f62df8b7.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 0xf3aa284c842765ad4d919c164465049a5648af2d7b8d13b75575945c8f1c9b06. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AUOD21301246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6591f4f82257a17d601f2b4b9abe0c36f4b3ad5c0f9dd795274f940d5cf5e8. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/AUOD21301247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb018463ba17e98a1fdcb73148fe925f26d9dbb6b18377362f22668f6ef3653e7. 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/AUOD21301248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb613f21c2ca0c32e4353154602e10766d794450b23637e883a1de90118f1e808. 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/AUOD21301249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22f5488d97ecbe8b4db9634dd0b8917d6f67f2162c00f73073d7542ba8eb8e8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AUOD21301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a190c3370706709bac6f51a5824be9a0e46cc395bc9a9b577f1311a35fdb99. 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/AUOD21301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a89dcb546cb6322a4a727d1f4cad711a84a4ee0e84db2521cce72f6ebb33e75. 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/AUOD21301252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65abe90b8bf798cf8f856e8b20e2c01a537c1f3f783dfb8cabe5a5c50c51dd64. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AUOD21301253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8d59e7a103abd72df333daacdfe8c4bce0a4ccc04eafc1fe201e6edfd6934e. 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/AUOD21301254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b5f36402ca2850fe35763e9a10a7a8d616b07ca4f3aabb121215a372fa4590. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/AUOD21301256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77fb3294f3dc88b17af81bbb0d20a6216a0226b26cf3c470497a36022deb56f. 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/AUOD21301257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc80928a6982555741e4859314756522c82a9d6c43225c1ee9e2d65e59957860. 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/AUOD21301258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2429fbd2bb68b8ee76646ec44a64aa36f98177dfb029b278eee5e38187f94ffe. 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/AUOD21301259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba17798e2c6adee2675cf2e898892c1125c489ffff9af67a22ed7b95dff7fcd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AUOD21301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34117824736720f51230b116bd64f82077df56ca3f76a9d80386faef00fe4ab4. 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/AUOD21301261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b8665639b8ee2258be24f931d710adc37c216be2ea9c196dae38fee680c94. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/AULIJ1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd415b6549060b7d903eba13e5710ed91ab87351dc74175ff5e7c263ba78da8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/AULIJ1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94341a0959b0ac5576f7e6f2ab099faccbc7973300df99aeba2d63e421c7bfb2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/AULIJ1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7922245e457ba3a592e723afe5639d8376fd2be2dcc132c85250b8c97acf2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AULIJ1700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cd049e8caf86550187013e52ac8b3d17eaabd7b9ac234f853ce15aee7a82ba. 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/QZFZ21900902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb94b2c4dc18e1683381bbaf609fabcaecc2e3f95d42276daf7f6534c612f3f. 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/AUWA02000672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c24c28f9baaa00f6ae8a102719ddef5db419e59677a004cfb236ab1367c308. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/AUWA02000673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e3bd625a17ca9d7ed2b95b8e7e5a501e942e7fa123679612b5f4d6043b672. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AUWA02000677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17429057da9418bfcba5ed2aabb0a2409530a2e8f53a7d46ce7aa68a7fa96694. 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/AUWA02000681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3429486e2f35462448cd77a400169eada88a5d532fce3d5df7255d6db6ce35. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUOB11200915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1a80facc285dc9ed31ebe8e671b3a9a170488348f063c596b4903f22283673. 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/QZHN31906990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7446ab987677a8d779ecfff00b7b4c6a1d7394651a7753eb0e79c71a5d5293. 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/AULIJ1700075.